भ त क Government of India ववद य त म त र लय Ministry of Power उत त क ष त र य ववद य त वमवत Northern Regional Power Committee

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1 भ त क Government of India ववद य त म त र लय Ministry of Power उत त क ष त र य ववद य त वमवत Northern Regional Power Committee.-उक ष वव /प रच लन/106/01/2017/ ददन क: व म : प रच लन मन वय उप वमवत क दस य To: As per list ववषय: प रच लन मन वय उप वमवत क 140 व ब ठक क क यग च Subject: Agenda of 140 th OCC meeting. प रच लन मन वय उप- वमवत क 140व ब ठक क 10:30 बज उ.क ष.वव.. वचव लय, नई ददल ल म आय वजत क ज एर उक त ब ठक क क यग च उत त क ष त र य ववद य त वमवत क व ब इट प उपलब ध ह 140 th meeting of the Operation Co-ordination sub-committee will be held on , 10:30am at NRPC Secretariat, New Delhi. The agenda of this meeting has been up-loaded on the NRPC s web-site Members are requested to kindly intimate for any discrepancy /missing agenda points.they are requested to go through the related Agenda points and keep the status ready for discussion in the meeting -sd- (उप न द र क म र) अध क षण अभ य त ( प रच लन) 18-ए, शह द ज त स ह म र ग, कटव र य य, नई ददल ल फ न: फ क : ई-म ल: seo-nrpc@nic.in व ब ईट: 18-A, Shaheed Jeet Singh Marg, Katwaria Sarai, New Delhi Phone: Fax: e- mail: seo-nrpc@nic.in Website:

2 Agenda for the 140 th Meeting of the Operation Coordination Sub-Committee (OCC) of NRPC Date & time: at hrs. Venue: NRPC Secretariat, New Delhi 1. Confirmation of Minutes: The minutes of the 139 th OCC meeting held on and at New Delhi were issued vide letter of even number dated The sub-committee may discuss and confirm the Minutes. 2. Review of Grid operations of last month (September 2017): 2.1 Anticipated vis-à-vis Actual Power Supply Position (Provisional) for September, Anticipated Power Supply Position v/s Actual (Provisional) Power Supply Position of Northern Region during the month of September, 2017 is as given below: State Delhi Haryana H.P. Punjab Rajasthan U.P. Uttarakhand Req/ Anticipated Actual %age Anticipated Actual %age Avl (MU/day) Variation (MW) Variation Req Avl Req Avl Req Avl Req Avl Req Avl Req Avl Req Avl As per above, it has been observed that there are much variations (i.e. > 5.0%) in the Anticipated vis-à-vis Actual Power Supply Position (Provisional) for the month of September, 2017 in terms of Energy requirement for Haryana, Punjab & Uttarakhand and in terms of Peak demand for Haryana, Punjab, Rajasthan & UP. These states are requested to submit reasons for such variations in writing so that the same can be deliberated in the meeting. The provisional Power Supply Position for the month of September, 2017 were available on CEA website. All SLDCs are requested to furnish the provisional and final power supply position in prescribed formats by 2 nd and 15 th day of the month respectively in compliance to the provision 5.3 of IEGC 2.2 Power Supply Position for NCR: NCR Planning Board (NCRPB) is closely monitoring the power supply position of National Capital Region. Monthly power supply position for NCR till the month of August, 2017 is placed on NRPC website. ( 2

3 State Members are requested to furnish the data on regular and time bound manner 2.3 Frequency Profile: The detailed frequency particulars are enclosed at ANNEXURE -2A 2.4 Voltage Profile: The voltage profile at the important sub stations in the NR region is enclosed at ANNEXURE-2B 2.5 Long outage of the Grid Elements and Generating stations is enclosed at Annexure-2C. All utilities are requested to update the status of revival of the Grid elements and the Generating stations. The NRLDC to make a detailed presentation on grid operation of last month 3 Maintenance Programme of Generating Units and Transmission Lines: 3.1. Maintenance Programme for Generating Units. The proposed maintenance programme for Generating Units for the month of November, 2017 was discussed on at NRPC office, New Delhi Outage Programme for Transmission Elements. The proposed Outage programme of NLDC & NRLDC oversight transmission elements for the month of November, 2017 was discussed on at NRPC office, New Delhi. 4 Planning of Grid Operation: 4.1 Anticipated Power Supply Position in Northern Region during November, 2017 as per LGBR for : Anticipated Peak Demand Expected Peak Availability November, 2017 Surplus (+)/ Deficit (-) Anticipated Energy Requirement Expected Energy Availability Surplus (+)/ Deficit (- ) (MW) (MW) (MW) % (MU/day) (MU/day) (MU/day) % Chandigarh Delhi Haryana H.P J&K Punjab Rajasthan U.P Uttarakhand Region SLDCs are requested to inform their updated estimate of power supply position for November, 2017 and measures proposed to be taken to bridge the gap in availability as well to dispose of the surplus, if any, in the prescribed format. 3

4 5 Monitoring of schemes funded from PSDF(Agenda by NPC) The latest status of the schemes for which grant has been sanctioned from PSDF for the schemes in Northern Region ANNEXURE-5 is enclosed with. Also the list of schemes that has been examined and clarification sought from utilities with respect to the schemes is detailed in the Annexure. Utilities are requested to submit the desired inputs so that further necessary action can be taken. Utilities are requested to expedite implementation of the schemes and submit information of physical as well as financial progress in the prescribed format by first week of every month on regular basis to Member Convener, PSDF Project Monitoring Group (AGM, NLDC and POSOCO) with a copy to NPC Division. 6 Information about variable charges of all the generating units in the Region. The variable charges for different generating units are available on the Merit Order Portal All utilities are requested to intimate if the process of Scheduling is being done as per Merit Order Despatch and in case of variations the reasons may be highlighted. 7 Sub-stations likely to be commissioned in next 6 months. The list of substations that stand commissioned or are to be commissioned by 11/2017(Annexure7) was submitted by POWERGRID representative in the 139 th OCC meeting. All the concerned states are requested to submit the details of the downstream network of these POWERGRID substations along with the detailed status/ sketches of these networks. 8. Cleaning and Replacement of porcelain insulators: All utilities are requested to submit the detailed status of replacement of Porcelain Insulators in line with the details brought out in Agenda Item 23 of the 139 th OCC meeting.. The adequate planning for replacement and cleaning of insulators should be submitted by all utilities. 9 Recommendation of Enquiry Committee for grid disturbances on 30 th July, 2012 & 31 st July, 2012: Discussions on implementation of recommendations pertaining to operational aspects made by the Enquiry Committee for grid disturbances on 30 th July, 2012 & 31 st July, 2012 are as under: 9.1 Healthiness of defense mechanism: Self- certification A. i) In the 27 th meeting of NRPC held on 30 th November, 2012 it was decided that all STUs would ensure settings of UFR and df/dt relays and load relief as per target. ii) iii) Report of Mock exercise for healthiness of UFRs carried out by utilities themselves on quarterly basis is to be submitted to NRPC Secretariat and NRLDC. All utilities have been advised to certify specifically, in the report that All the UFRs are checked and found functional. Any discrepancy should be detailed upon and the time line for rectification of the same should also be intimated. In the 31 st meeting of NRPC held on it was decided that the quarterly test report of UFR and df/dt would be uploaded on the website of respective SLDC. 4

5 iv) In the 136 th OCC meeting all utilities were informed that UFRs testing by the NRPC secretariat is in progress and were requested to update any change in the name of officers assigned for UFR testing. v) The report of the UFR testing for quarter ending June 2017 has been received from all utilities by the 139 th OCC meeting. All utilities are requested to submit the UFR testing report for the quarter ending September B. BBMB had informed that replacement of static relays by numerical relays at 7 substations (5 stations in Haryana at Panipat, Dhulkot, Kurukshetra, Jagadhari & Hissar) by HVPNL was pending. 134 th OCC meeting: HVPNL representative had intimated that the LOA for procurement of 22 UFR relays has been placed. 136 th OCC meeting: HVPNL representative informed that relays will be replaced by th OCC meeting: HVPNL representative informed that the relays will be replaced by th OCC meeting: HVPNL representative intimated that relays stands received in the store and the concerned officers have been directed to change the relays in the BBMB substations 139 th OCC meeting: HVPNL representative intimated that the work is in progress. HVPNL to update progress achieved C. On scrutiny of the UFR reports of PTCUL, it was noted that the static type UFRs were still installed on Transformers/feeders emanating from 132KV Majra and Jwalapur Substations and 220KV Ramnagar, Roorkee and Rishikesh Substations. PTCUL to update the status of replacement of the static relays D. As the testing of UFR Relays has started by the NRPC Sectariat all utilities are requested to ensure that the testing kits are operational and the relays are in working condition at all their substations. The SLDC concerned will be intimated regarding the testing programme and they are requested to ensure that the concerned protection teams reach the substation with all the necessary arrangements. All utilities to kindly note. 9.2 Strengthening of Intra-State transmission system Recommendation of the Enquiry Committee: Intra-State transmission system needs to be planned and strengthened in a better way to avoid problems of frequent congestion. In the NRPC meeting held on 30 th November, 2012, it was decided that SLDCs should give half yearly feedback to STU regarding bottlenecks, constraints and overloading in the State transmission network for proper transmission planning. Accordingly all SLDCs were requested to submit advice regarding constraints, to their STUs, regularly at half yearly intervals i.e. on 1 st January and 1 st July of every year. 136 th OCC meeting: All the SLDCs were advised to submit the next half yearly feedback ending June

6 137 th OCC meeting: DTL, HVPNL in the meeting were requested to update the status specifically regarding the action taken/action plan of the STU on the feedback given by the SLDCs for the period ending December DTL & HVPNL updated THE information in the 138 th OCC meeting. All the SLDCs were again advised to submit the next half yearly feedback ending June 2017 in detail, in line with the feedback given by NRLDC in the various OCC Meetings, to their STUs with a copy to the NRPC Secretariat. Information from PSTCL stands received. 138 th OCC meeting: RRVPNL, DTL& HVPNL submitted the data in the meeting. PTCUL, UPPTCL, HP were requested to update the information. 139 th OCC meeting: In the meeting UPPTCL representative assured that the information would be send positively after the meeting. RVPNL has submitted the details of the action taken/action plan of the STU on the feedback given by the SLDCs for the period ending June 2017.All other utilities i.e. DTL, PSTCL & HVPNL who had submitted the information were also requested to submit the details of the action plan / action taken by their respective STUs. PTCUL & HP representative assured that the information will be updated at the earliest.ms NRPC proposed that a proactive role should be taken in this regard by all SLDCs DTL, PSTCL & HVPNL are requested to submit the details of the action plan / action taken by their respective STUs. PTCUL & HP to update the information ending Jun Installation of adequate static and dynamic reactive power compensators Based on the studies carried out by POWERGRID for identifying compensation required in intra-state network at 220 kv level, discussions held in the 29 th Meeting of NRPC and subsequent discussions, reactors were to be installed at 9 locations, out of which 6 have been installed. The updated status of remaining 3 reactors is as under: S.No. SUBSTATION MVAR Implementation by 1 HINDAUN 125 RVPNL Updated Status in 139 th OCC Expected by MANESAR 125 POWERGRID Expected by MERTA 125 RVPNL Expected by RVPNL & POWERGRID may update the status regarding the progress of work Study by POWERGRID for reactive compensation at 220 kv level: The proposal for installation of bus reactors at 12 nos at 400 kv and 17 nos at 220 kv sub-stations was discussed in the 29 th meeting of NRPC held on 13 th September After deliberations, NRPC had approved installation of reactors at 400 kv sub-stations of POWERGRID and RVPNL. As regard 220 kv bus reactors, POWERGRID had stated that the requirement would be firmed up in consultation with the States. Subsequently, POWERGRID, vide dated had submitted report of the study. In this report, reactors at 13 locations at 220 kv levels and at 24 locations at 400 kv level had been proposed. The report was discussed in 34 th TCC/38 th NRPC meeting held on 24 th /25 th October, 2016 wherein Delhi had requested to review the system study for their system. POWERGRID agreed for the same. Subject to review of requirement for Delhi, NRPC approved the report. 6

7 In the 135 th OCC meeting, representative of Delhi informed that the report would be finalized shortly. 35 th TCC/39 th NRPC meeting held on decided that the report of the POWERGRID and the study by RVPNL to be referred to the Standing Committee on Power System Planning of NR. OCC advised Power Grid and RVPNL to take action in this regard. 136 th OCC meeting Representative of DTL informed that as per the second study conducted by POWERGRID the requirement of reactor for DTL has increased significantly which may not be in line with the actual requirement. Therefore, it was informed to OCC that DTL will again be conducting the study determining the requirement of the reactors. 137 th OCC meeting: DTL representative informed that they have planned to install the reactors as per the requirement arrived in their own study which was conducted by CPRI. DTL was requested to submit the plan for the same. Representative of PSTCL & RVPNL informed in the meeting that the minutes of Standing Committee meeting were still awaited. 138 th OCC meeting: The representative of RVPNL informed that the reactors as proposed by POWERGRID in their study and the proposal of RVPNL to install 13 nos. 220kV and 1 no. 400KV Bus Reactors at various GSS have been agreed in the 39 th Standing Committee Meeting held on th May It was further informed that the fund from PSDF would be utilized for the scheme. MS, NRPC requested Rajasthan to expedite the submission of the proposal for PSDF funding. Representative of DTL informed that the scheme is under preparation and is planned to be implemented within 09 months. In the 1 st phase 30% of proposed reactor is planned i.e. at Bamnauli and Mahranibagh S/S. DTL was also requested to expedite the process. Decision of Standing Committee: In the 39 th Meeting of SCPSPNR held on 29 th & 30 th agreed: May 2017 following was a) TCR of capacity 500 MVAr at Kurukshetra 400 kv bus. b) Bus Reactors at 30 no. 220 kv sub-stations and 18 no 400 kv level sub- stations subject to the availability of space (Annexure-9). It was also agreed that these reactors shall be provided by the owner of the substations. 139 th OCC meeting: The representative of RVPNL intimated in the meeting that the approval of PSDF funding of above said 14 reactors is awaited. He informed that PSDF approval committee had certain reservations about the inclusion of Static and dynamic reactors in the same scheme, therefore, the scheme was being split into two separate schemes of static and dynamic reactors and was to be resubmitted. 7

8 RVPNL may update the status. DTL representative informed that in the 1 st phase, 30% of proposed reactor is planned i.e. at Bamnauli and Mundka S/S rather than Mahranibagh S/S as informed in the 138 th OCC meeting. DTL may update the status. All the utilities are requested to submit the action plan for the installation of the reactors finalized in 39 th Meeting of Standing Committee on Power System Planning of Northern region. 10. System Protection Schemes (SPSs) in Northern Region: 10.1 SPS for Interruption of import by NR at 765 kv Agra (from WR). Review of SPS for 765 kv Agra-Gwalior line The revised SPS for meeting contingency of 765 kv Agra-Gwalior was approved in 32 nd TCC/36 th NRPC meeting held on 23 rd /24 th December, It was also agreed in the 36 th NRPC meeting that POWERGIRD would implement the revised scheme within 06 months after the receipt of the feeder details from the States. 129 th OCC meeting: POWERGRID stated that the scheme would be commissioned by th OCC had recommended that the cost of implementation of revised SPS for 765 kv Agra- Gwalior lines could be booked in any ongoing project/ work of Northern Region. In the 132 nd OCC meeting representative of POWERGID proposed that provision of AMC of the scheme for 05 years could also be included in the scope of the work for implementation of the revised scheme. Members agreed to the proposal of POWERGIRD. POWERGRID representative informed that they were waiting for NRPC approval in this regard. After detailed deliberation it was decided that keeping in view urgency of the work, POWERGRID should carry out tendering activities for timely implementation of the revised scheme. The recommendation of the OCC would be put up for concurrence of NRPC in next meeting. 39 th meeting of NRPC held on approved the proposal given in the 129 th OCC meeting by POWERGRID for booking the cost of revised SPS including 05 years AMC in some other on-going project/work. 137th OCC meeting: POWERGRID representative informed that the implementation of the scheme may be delayed by few weeks. However, OCC pursued POWERGRID to complete the same within the stipulated time. 138th OCC meeting: In the meeting representative of POWERGRID, informed that bid opening was scheduled to be held on It was further informed that the scheme would be implemented by Power Grid to make a presentation of the scheme in 139 th OCC & also discuss the simulation studies. 139th OCC meeting: In the meeting it was informed that the scheme would be implemented by

9 POWERGRID may update. Mapping of Feeders in SCADA 135 th OCC meeting: The concern was expressed about no progress made by the state utilities so far regarding mapping of feeders in SCADA, identified for the SPS load relief. OCC advised all concerned utilities in the meeting to take action in this regard at the earliest and inform the action taken. 136 th OCC meeting: The Sub-Committee was informed that mapping of feeders in SCADA, identified for SPS load has been implemented by HVPNL and partly by Rajasthan. Other utilities were requested to implement the same at the earliest. 139 th OCC meeting: All the utilities except RRVPNL & HVPNL who have implemented mapping of feeders in SCADA identified for SPS load were again requested to implement the mapping of feeders in SCADA at the earliest. Utilities to update the progress made. Mock Testing of SPS for 765 kv Agra-Gwalior line POWERGRID representative had stated that in view of recent multiple tripping at Agra Sub Station, the Mock Testing of SPS for 765 kv Agra-Gwalior line was required. After deliberation it was decided that the same may be done on from 7:00 to 11: th OCC meeting: POWERGRID informed that the testing was successfully performed and some modifications have been done in the logic. OCC asked POWERGRID to submit the report of the testing and the changed logic to the NRPC sect. 137 th OCC meeting: POWERGRID representative submitted the information regarding the changed logic. It was requested to POWERGRID to submit the same along with the detailed report of the testing done 138 th OCC meeting: It was noted that POWERGRID has submitted the report. However, citing the legibility of the logic in the submitted report, representative of POWERGRID was requested to share simulation studies and detail logic of SPS and to give a presentation of the scheme along with the changed logic in 139 th OCC meeting. POWERGRID may give a presentation on the changed logic of the scheme SPS for ICTs at 765 kv Unnao sub-station: A discussion was held on in NRPC secretariat with the officers from UPRVUNL in the presence of officers from NRLDC, POWERGRID and NRPC sect. 9

10 UPRVUNL was briefed about the basic philosophy along with the hardware requirement of the System Protection Scheme (SPS) for evacuation of Anpara-D generation. It was agreed that UPRVUNL along with UP SLDC would prepare the SPS for safe power evacuation of Anpara-D. Further the scheme would be submitted to the OCC for approval. Thereafter, the matter was under discussion in meetings of OCC without much progress. 121 st OCC meeting It was decided that, the scheme was to be implemented by UPPTCL. 34 th TCC/38 th NRPC meeting: UPPTCL informed that LOA would be placed by and scheme would be implemented in next 3 months 137 th OCC meeting: UPPTCL informed that implementation of the scheme will be done by th OCC meeting: In the meeting representative of UPPTCL informed that the work has already been completed at Unnao end. However, the contacts required from the generating end were not obtained as those could be obtained only when the unit would be under shutdown (as informed by UPRVUNL). 139 th OCC meeting: In the meeting it was again informed that the contacts required from the generating end were still awaited. Rest all work stands completed and the scheme would be implemented as soon as the contacts are obtained UPPTCL may update the status SPS for Kawai Kalisindh - Chhabra generation complex: SPS for Kawai-Kalisindh-Chhabra generation complex was recommended in 122 nd OCC meeting held on 22 nd April, RVPNL, vide dated has confirmed that the SPS for Kawai-Kalisindh-Chhabra generation complex has been put into operation. However, it is observed that the automatic load shedding recommended in part (c) of the scheme has not been implemented by RRVPNL. The scheme was discussed in 34 th TCC/38 th NRPC meeting held on 24 th /25 th October, 2016 wherein RRVPNL stated that feeders have been identified and the scheme would be completed by March th OCC meeting: Rajasthan representative intimated that, the part of the scheme related to load shedding would be completed by March, st OCC meeting: Rajasthan representative intimated that load shedding part of the scheme has been installed on trial basis for 100 MW load. Mock testing of the SPS would be done for the shortlisted load and if successful the scheme would be extended for complete 700 MW load. OCC advised RVPNL to implement the SPS scheme for the identified load at the earliest and submit the report to NRLDC and NRPC Secretariat. 10

11 133 rd OCC meeting: Rajasthan representative submitted that the administrative approval for implementation of the Automatic Load shedding for identified feeders have been obtained and the NIT for the work would be floated soon. Regarding revision in SPS scheme after commissioning of Chhabra stage - II (Unit 5), RVPNL representative stated that the same is under consideration and information in this regard would be submitted shortly. 134 th OCC meeting: Rajasthan representative intimated that the scheme has been revised upon the commissioning of Chhabra stage II. On the query regarding quantum of backing down of generation with N-1 contingency of 400 kv Kawai-Anta Ckt.- 1 & 2 and 765 kv Anta-Phagi Ckt.- 1 & 2, representative of RRVPNL intimated that generation will be reduced to 65 % of the installed capacity. OCC suggested RRVPNL that the reduction in generation up to 60 % of the installed capacity in the above mentioned contingency may be considered. RRVPNL agreed to review the scheme. 135 th OCC meeting: RVPNL representative intimated that the issue was being discussed with the Generation Company. As per the letter received from CE PP&D RRVPNL a meeting was held on in light of the issue of revision in existing SPS scheme for Kawai, Kalisindh & Chhabra complex due to addition of Chhabra SCTPS Unit 5. In the meeting representatives of the four generating companies opined that technically it is not possible to reduce the generation up to 60%. They insisted that backing down may not be reduced beyond 65% because it may result in instability. After deliberation it was decided that 65% backing down of generation may be considered for SPS at Kawai, Kalisindh, Chhabra & Chhabra Super Critical Complex. Till the new scheme is implemented the existing approved scheme will stay in operation. 136 th OCC meeting: Members were of the view that this complex being very important for the power supply of Rajasthan, the recent incident of complete generation loss of the complex needs to be avoided. Keeping in view the importance of the complex, the members advised Rajasthan to go forward with their proposed backing down for the time being. However, it was cited in the meeting that as per new regulations prepared by CERC, the generators will be required to back down their generation up to 55%. 137 th OCC meeting: Rajasthan representative informed that NIT would be floated in July 2017 and the scheme will be implemented by Dec th OCC meeting: Representative of Rajasthan informed that revised SPS scheme for Kawai-Kalisindh- Chhabra generation complex due to addition of Chhabra SCTPS (Unit#5) has been intimated to the concerned department for implementation. He stated that the Chhabra SCTPS (Unit#5) would be allowed to be commissioned on implementation of the scheme. Regarding the 11

12 automatic load shedding scheme, it was informed that bid would be opened on and the scheme would be implemented by th OCC meeting: The representative of Rajasthan informed that all efforts are being made to implement the scheme by RRVPNL may update the progress of work on the implementation of the scheme SPS for Lalitpur Generating station: 3x660 MW LPGCL Power Station is connected to the Grid through 2xS/C 765 kv Lalitpur- Agra (Fatehabad) lines and 220 kv D/C lines to Lalitpur and Jhansi. 3 rd PASG meeting, 11 th July 2017: In the meeting it was observed that UP has put in place some System Protection Scheme (SPS) at Lalitpur for taking care of tripping of 765 kv Lalitpur - Fatehabad lines though the scheme has neither been put up for approval in NRPC nor the details have been shared with NRLDC. It was decided to bring the implemented scheme for approval to the OCC forum. 137 th OCC meeting: In the meeting, OCC was briefed about the implemented scheme at Lalitpur TPS. OCC after due deliberation suggested some modifications in the already implemented SPS scheme and advised LPGCL to discuss the same with UP in a separate meeting. Representative of LPGCL was requested to take up the issue on priority basis and also to brief the committee about the same before implementing. 138 th OCC meeting: In the OCC meeting it was informed that, a separate meeting between LPGCL and UP SLDC was held on wherein the logic for the scheme was figured out. Minutes of the meeting were awaited and would be forwarded to NRLDC and NRPC Secretariat once they were finalized. UP SLDC representative requested to submit the draft logic as approved in their meeting with LPGCL to NRLDC and NRPC secretariat before finalizing the same so that the issue is expeditiously finalized. 139 th OCC meeting: In the meeting, it was informed that the draft logic has been submitted to NRLDC and NRPC secretariat. It was intimated that the scheme would be implemented by NRLDC has made certain observations regarding the proposed scheme (Annexure- 10). UPPTCL may clarify and inform the status of implementation. Members may discuss. 11. System Study for Capacitor Requirement in NR for the year & In 34 th TCC and 38 th NRPC meetings, held on 24 th & 25 th Oct, 2016 the matter was discussed and it was decided that LOA should not be cancelled and the study should be carried out for the year and through CPRI. It was also decided that all the 12

13 States would submit the data by for carrying out study for the period Subsequently, the data would be submitted for carrying out study for rd OCC meeting: Sub-Committee was apprised that data for had been received from all the utilities and the same has already been sent to CPRI. Based on the data submitted by the utilities CPRI carried out the capacitor study. The report submitted by CPRI for is available on NRPC website ( 135th OCC meeting: Sub Committee was informed that the proposal of installation of capacitor by Haryana, Punjab, Uttar Pradesh and J&K through PSDF funding was approved in the 35 th TCC/39 th NRPC meeting held on 1 st & 2 nd May, 2017 as per recommendation of OCC and the same has been referred to the Convener, Techno Economic Sub Group & Consultant NLDC for PSDF Funding on Utilities noted the information. 136 th OCC meeting: All the utilities were requested to submit the comments if any to the proposed capacitor requirement in the report by CPRI. Only Rajasthan has submitted the comments. 137 th OCC meeting: Utilities were asked to submit the action plan for the implementation of the requirement as recommended in the report. Comments on the report were received from RVPNL and DTL and the same were discussed with CPRI. After the discussion, CPRI has submitted an amended report ( stands uploaded on NRPC website) wherein clarification is provided for Table 11 of the draft report, in which, recommendations are made regarding the quantum of additional capacitor bank needed to be installed along with those that needs to be switched ON from the existing ones. 138 th OCC meeting: Modified report as submitted by CPRI (based upon the comments of Rajasthan & Delhi) was put before OCC. Utilities were requested to go through the revised report and submit their comments if any to the same. Rajasthan representative stated that the specific comments of their STU would be submitted after the meeting. UP, SLDC raised issue of difference in given data and considered data for study in the revised CPRI report. After clarification from CPRI, it was informed that data as per the PSSE file was used to study due to inability in identifying the upstream substation corresponding to data submitted by states utilities for 11kV/33kV substations where capacitor are actually connected. 139th OCC meeting: In the meeting, representative of UP had some reservations regarding the operational quantum of capacitor of capacitor bank being reflected in the report. It was informed that, the figure mentioned in the report was MVAR, however, it was somewhere in the range of 5000 MVAR operational in their system. Representative of CPRI in the meeting assured that rechecking of the data incorporated in their study would be done. He further informed that, during the study, help of power maps 13

14 available on UPSLDC s website was also taken as it was not possible to trace the details of upstream substation for the capacitor submitted at 11kV and 33 kv level. In the meeting the issue of identifying the 11kV and 33kV feeders corresponding to the recommendation of CPRI for capacitor installation (recommendation made at 220kV and 132kV substation by lumping the downstream network) was also discussed. It was opined that, for a radial system the requirement as recommended can be more or less equally distributed among the downstream feeders. However, for a connected system it would not be possible. For the study of capacitor requirement for , it was proposed to conduct the study at 11kV/33kV level in order to obtain more feasible and practical requirement of capacitors in case the system at 220/132/66kV was not radial. However, if the system is radial, then the requirement of capacitors assessed by the CPRI may be proportionately translated upto 11kV level. States informed that most of the system is radial. Therefore capacitors study could be done as per original proposal of CPRI for also. Utilities are requested to submit the action plan for the implementation of the capacitor requirement as recommended in the report. 12. Status of data through Automatic Meter Reading (AMR) In the 13 th NRPC meeting held on 27 th June 2009, scheme of Automatic Meter Reading from Interface Meters in Northern Region was approved. NRLDC and POWERGRID were to submit the joint status report of AMR at the end of every month. In the 34 th TCC meeting, held on 24 th Oct, 2016, NRLDC stated that out of 1235 interface meters, data from 973 meters was being received and being regularly used by NRLDC for 764 interface meters. POWERGRID informed that the data from all the meters will be available by January TCC and NRPC expressed concern over tardy progress of the implementation of AMR. The progress of installing AMR is being regularly mentioned in OCC meetings. 133 rd OCC meeting: POWERGRID updated that the work would be completed by April, th OCC meeting: POWERGRID representative raised their concern over lack of support from site in matters regarding AMR implementation. He informed that site personnel are downloading SEM data manually by removing wiring and in many case not plugging it in, despite of provision for downloading the data manually even when meter is plugged in. The issue has also been communicated to the site, but still not resolved. 136 th OCC meeting: The joint report of NRLDC & POWERGRID was submitted. Sub-Committee had advised all the transmission and generation Utilities to co-operate with the vendor to resolve the issues regarding ORU removal for manual downloading of data from SEMs. 137 th OCC meeting: The Status was updated by POWERGRID & NRLDC 138 th OCC meeting: The Status was updated by POWERGRID & NRLDC.On the issue of provision of the prospective plan of 5 minute scheduling in the AMR, Power Grid was asked 14

15 to take up the matter with the manufactures so that adequate provision for the same can be made in the new AMR being installed. 139 th OCC meeting: The Status was updated by POWERGRID & NRLDC On the issue of provision of the prospective plan of 5 minute scheduling in the AMR, Power Grid representative expressed their inability to get modifications made for 5 minute scheduling. They further stated that once the regulation is notified they will take the further necessary action. POWERGRID & NRLDC, to update status. 13. Planning, procurement and deployment of Emergency Restoration System. The issue was discussed in the 33 rd meeting of NRPC held on and it was suggested that CEA should evolve guidelines regarding ERS. Later, Secretary (Power), GoI vide letter dated addressed to Chief Secretaries of all the States, had requested to issue directions to transmission utilities / transmission licensees to procure adequate number of Emergency Restoration Systems. The guidelines formulated by CEA for planning, procurement and deployment of Emergency Restoration System were also enclosed with that letter. The matter was discussed in 34 th TCC and 38 th NRPC meetings, held on 24 th & 25 th Oct, 2016 and the subsequent meetings. The latest status as updated by the members in 139 th OCC is as under: DTL :- Order had been placed for 02 nos. of ERS. Delivery has been completed. Training to be completed by September 2017 PSTCL: - Order has been placed. Supply expected by October, UPPTCL: - 02 nos. of ERS have been received. RRVPNL: - Will not be procuring ERS. HVPNL: - PTCUL- HPSEBL BBMB - J&K- Earlier it was informed that in place of ERS, spare towers would be procured worth Rs Two crore. In 138 th OCC it was informed that the management is reviewing the issue of procurement of ERS. NIT placed. Supply expected in 3 month. Representative present intimated that the status will be updated by next OCC. Discussions being held with vendor. Suitability of ERS for critical locations is being explored. Discussions not concluded. Partner states have agreed to provide the ERS as and when required by BBMB. Order has been placed for 2 nos. ERS. Utilities to update 14. LVRT issues of wind/solar generation As per the CERC order dated issued in Petition No. 420/MP/2014 wherein CERC has directed that LVRT should be implemented for all wind turbines (except Stall Types) commissioned before having installed capacity equal to or more than 500 KW. Further as per the CEA Technical Standard for connectivity to the Grid (Amend.) Reg.2013 (sub clause (3) of Clause B 2 ) of the station connected to the grid 06 months after publication of these regulations (i.e ) shall have the LVRT capability as depicted in the sub-clause. As LVRT are not installed on many of the wind turbines in State of 15

16 Rajasthan, the issue is being regularly raised in the various meetings of NRPC without any result. 137 th OCC meeting: RVPNL representative informed that no progress has been made even after regularly pursuing for the same. Sub-Committee advised RVPNL to submit a petition to the State Regulatory Commission for the non-compliance of the regulations. Subsequently a letter from the NRPC Secretariat has also been written to Chairman RRVPNL on the issue. 138 th OCC meeting: RVPNL representative informed as under: The updated status of LVRT for wind generators stands submitted. Further as per directions of NRPC in 134 th OCC meeting regarding installation of LVRT on wind generators, the SE (REMC) has been requested repeatedly to take up the issue with wind generators for ensuring compliance of CEA Regulations and CERC orders in this regard. As per the advice of the Sub-Committee in 137 th OCC meeting, the case has been forwarded to REMC wing to submit a petition to RERC for non-compliance of regulation 139 th OCC meeting: Representative of RVPNL informed that matter is being taken up. RVPNL may update to status. 15 RGMO/FGMO compliance by generators in the region (Agenda based on letter by CERC) CERC (IEGC) 5 th amendment of IEGC dated provides that all Coal/lignite based thermal generating units of 200 MW and above, Open Cycle Gas Turbine/Combined Cycle generating stations having gas turbines of capacity more than 50 MW each and all hydro units of 25 MW and above should provide RGMO/FGMO response. Further, it has been provided at Regulation 5.2(h) that RLDCs/SLDCs should not schedule the generating station or unit(s) thereof beyond ex-bus generation corresponding to 100% of the installed capacity of the generating station or unit(s) thereof and that the generating station shall not resort to Valve Wide Open operation of units so that primary response is ensured. CERC in its letter dated has directed to obtain the status of availability of RGMO/FGMO response from the generators (ISGS as well as intra-state generators) in the region. 136 th OCC meeting: All utilities were requested to submit the status of actual response being provided by generators under the primary response. SLDCs were asked to provide the region report by th OCC meeting: All SLDCs were again requested to submit the detailed status of actual response being provided by generators under the primary response by

17 138 th OCC meeting: The updated status of units operating under RGMO/FGMO was received from NTPC, NHPC, PTCUL and NPCIL in the meeting. The latest status of RGMO/FGMO as available with NRPC is once again attached in ANNEXURE 15 of the Agenda of the 139 th OCC meeting. 139 th OCC meeting: RRUVNL &UPRVUNL submitted the status in the meeting. All the remaining utilities were requested to check and update the status. All concerned utilities to update 16. Phase mismatch issue with BBMB and interconnected stations During the discussions held in 34 th PSC meeting, it was reported that phase sequence of BBMB at the interconnection with other utilities, do not match with that of the other utility. It was observed that, this problem leads to a lot of confusion during charging of interconnected lines and also to other coordination problem while reporting any issue. While deliberating it was observed that, the main issue was primarily of the nomenclature of phases at BBMB end and based on the discussion it seems that the nomenclature of phases at BBMB end has inadvertently been marked as mentioned below: Phase of the grid R Phase Y Phase B Phase Corresponding nomenclature of the phase at BBMB end B Phase R Phase Y Phase In view of the above BBMB was asked to rectify the nomenclature issue at their end which leads to coordination and other problems while reporting. In the 138 th OCC meeting, BBMB representative informed that the issue of mismatch of phases is being looked into and would be rectified at the earliest. BBMB may update the status 17. Auto reclose to Non-auto reclose mode in relay setting (Agenda by Power Grid) Relay setting may be changed from Auto reclose to Non-auto reclose mode for OPGW LIVE LINE stringing works in following lines. As per NLDC auto reclose mode changing on long duration may be approved by NRPC. a. 765kV S/C Meerut- Greater Noida line Oct to 31 st Dec 2017 (currently work in progress by taking NLDC/NRLDC code on daily basis). b. 765kV S/C Greater Noida to Agra line 15 th Nov to 31st Jan c. 400kV S/C Agra- Bassi line (currently work in progress by taking NRLDC code and shall be completed by 15 th Nov 2017). d. 400kV D/C Neemrana-Sikar line ckt-i (currently work in progress by taking NRLDC code shall be completed by Dec 2017). 17

18 e. 400kV D/C Dadri-Maharanibagh line - 15 th Nov to 31st Jan f. 400kV D/C Hissar-Bhiwadi line - 15 th Dec to 31st Jan g. 400kV D/C Gorakhpur PG-Gorakhpur UP line - 15 th Dec to 31st Jan h. Balance work of 400kV Ballabhgarh PG- Bamnauli DTL line 1 st Nov to 20 th Nov 2017 (10Kms OPGW work pending due to non issuance of PTW by DTL even in live line condition).\ Sub committee to discuss. 18. Frequent outages of HVDC Vindhyachal Block-I &II The HVDC Vindhyachal back to back station block I& II is an important inter connection between Western & Northern Region. It enables power flow either ways in case of constraints within Northern or western regions or on the parallel AC ties providing a variation of 1000MW.It has been observed in the recent past that the HVDC Vindhyachal Blocks are frequently tripping on account of DC over current protection operation. In most of the incidents it is seen that the HVDC blocks trip whenever there is a fault in nearby AC system. The list of such tripping in last 6 months is listed at ANNEXURE 18 Power Grid is requested to look into the matter to determine the root cause of the problem & take remedial measures. Power Grid is requested to update. 19. Mock Black start exercise for the year As per Indian Electricity Grid Code (IEGC) clause 5.8 (b) Mock trial runs of the procedure for different sub-station shall be carried out by the users/ctu/stu at least once every six months under intimation to the RLDC. Further, Mock Black- start exercise of power station are therefore needs to be carried out in-order to ensure healthiness of black start facilities. It has been suggested by NRPC that the winter months are off peak hydro period and therefore good time to carry out such exercise. It was requested to carry out mock black start exercise for the year in respect of following proposed hydro power stations of Rajasthan S. No. Utility Hydro / Gas Power Station Installed capacity 12 Rajasthan Mahi-I & II 2x25 + 2x45 13 Rana Pratap Sagar 4x43 14 Jawahar Sagar 3x33 16 Dholpur GPS 3x Ramgarh GPS 1x x x110(GT) + 1x50 (STG) Rajasthan is requested to update regarding the tentative schedule dates of mock drill exercise to be undertaken by them for the above stations. 20. Energy demand projections for preparation of LGBR At the beginning of each financial year, Northern Regional Power Committee (NRPC) brings out Load Generation Balance Report (LGBR), which contains anticipated month-wise power supply position for the year in terms of energy as well as peak power. A meeting of the LGBR sub-committee was held at NRPC Secretariat, New Delhi on in this 18

19 regard. Demand projections for the states of Delhi, Himachal Pradesh, Rajasthan and Uttar Pradesh were received and discussed in the meeting (Annexure 24). Other states are requested to submit their demand projections by ; otherwise the projections done by NRPC would be treated as final for preparation of LGBR. 21 Reliability issue of Kashmir valley Kashmir Valley is connected to the rest of grid through 400/220 kv Kishenpur substation with following lines: i. 400 kv Kishenpur-New Wanpoh 2xD/C [However there are only two 400 kv lines between New Wanpoh to Wagoora] ii. 220 kv Kishenpur-Ramban/Mirbazar-Pampore D/C (one circuit from Kishenpur presently being out of service due to tower collapse since 08 th Feb 2017 revived for a brief period for 14 days in the month of July 2017) Reliability issues related to Kashmir valley have been flagged in many previous OCC & TCC meetings. Load in the valley area has been increasing over the years and therefore reliability concerns have also been increasing. In past years, there have been multiple elements tripping incidents and collapse of valley system during winter months/ high demand period on N-1 contingency in the Kashmir valley power system. Following issues with Kashmir valley power system are observed with the onset of winter months: i. 400/220 kv Wagoora (main supply point) where 4x315 MVA ICTs remain fully loaded during winter months and therefore N-1 criteria gets violated. High MVAr drawl is reported at Wagoora S/s which results in low voltages. ii. 220 kv lines from Wagoora (220 kv Wagoora-Ziankote D/C and 220 kv Wagoora-Pampore D/C) remain loaded upto MW and therefore N-1 criteria gets violated. iii. Low voltages are experienced due to high loading of intrastate network of valley power system. iv. Tripping of connecting 400 and 220kV lines during inclement weather of high snowfall/storm and thus valley islanding and collapsing is observed. MW/MVAR loading of ICTs at Wagoora and line loadings of 220kV Wagoora-Ziankote D/C & 220kV Wagoora-Pampore D/C is shown below. It is clear from graph below that there is High MVAr drawl at Wagoora which results in low voltages High loading of 220kV lines (220kV Wagoora-Ziankote D/C & 220kV Wagoora- Pampore D/C) N-1 non-compliance of ICTs at Wagoora 19

20 The System Protection Schemes (SPS) and system strengthening were approved by Central Electricity Authority (CEA) after 06 th January 2012 tripping to improve reliability/saving valley from collapse during such conditions. However, these schemes are yet to be put in place. J&K state utility may like to give details about their preparations for the above highlighted issues & their action plan indicating timeline for remedy of various issues highlighted above. 20

21 22 Coal shortage at central & state thermal generating units As discussed in previous OCC meetings and through various communications by NRLDC it was requested to all generating units to keep sufficient reserves, fuel availability and sufficient machines on bar considering depleting hydro generation & expecting high demand in Northern Region in September due to dry spell of monsoon. However, large no. of units continues to remain out on fuel shortage issues. Unit wise details available at NRLDC regarding present status of outage of machines due to coal shortage as on is tabulated below: S. Unit Name & State Owner Capacity Reason Outage since No. no. date 1 Suratgarh TPS RAJASTHAN RRVUNL 250 Coal Unit 3 shortage 2 Suratgarh TPS RAJASTHAN RRVUNL 250 Coal Unit 6 shortage 3 Kota TPS Unit 1 RAJASTHAN RRVUNL 110 Coal shortage 4 Kota TPS Unit 2 RAJASTHAN RRVUNL 110 Coal shortage Kawai TPS Unit 1 RAJASTHAN ADANI 660 Coal shortage Kota TPS Unit 7 RAJASTHAN RRVUNL 195 Coal shortage * 7 Kalisindh TPS RAJASTHAN RRVUNL 600 Coal Unit 2 shortage 8 Lalitpur TPS UP LPGCL 660 Coal Unit 1 shortage 9 IGSTPP Jhajjar Unit 2 Haryana APCPL 500 Coal shortage Chhabra TPS RAJASTHAN RRVUNL 250 Coal Unit 2 shortage 11 Suratgarh TPS RAJASTHAN RRVUNL 250 Coal Unit 2 shortage (*revived on ) It could be observed that Rajasthan state control area is most affected (total 2675MW) due to outage of thermal units on coal shortage. As per Critical Station Coal Stock report data available at NRLDC of generating units where coal stock is critical as on is shown below: Sr. No 1 2 Name of the Station Dadri Th-1 Dadri Th-2 Owner Total Capacity (MW) Present Generati on (MW) Loss of Generation due to Coal Shortage (in MW) NTPC NTPC Jhajjar NTPC Present coal stock (in no. of days) < 1 days < 1 days < 1 days Remarks (if any) 4 rakes received for stage I & II together against the requirement of 8-10 rakes for full generation. 2 coal rakes against the requirement of 7 rakes for full generation. 21

22 4 Rosa UP Nil 5 Lalitpur UP Nil 6 Bara UP Nil CTPP, Chhabra Suratgarh TPS KSTPS, Kota APRL, Kawai 11 Kalisindh 12 Talwandi Rajast han Rajast han Rajast han Rajast han Rajast han < 2 days <1 days days days days Punja b days Punja b days Total NR Rajpura 2 rakes received against the requirement of 4 rakes for full generation. 5 rakes received against the requirement of 6 rakes for full generation. 1 rake received against the requirement of 6 rakes for full generation. CTPP Unit no. 2 kept boxed up due to shortage of Coal. Requirement 6 rakes per day for full generation. Presently only 2 or 3 rakes per day received at STPS, siding status as on Coal stock position at 00:00 hrs. on 11/10/17 is MT Unit # 1 withdrawn at 05:45 Hrs due to Coal shortage. Coal stock available at 24:00 hrs. of in respect of Kalisindh TPS is only of 01 day. Only 02 no.s coal rakes were received on as against requirement of 04 no.s coal rakes to run the plant at full load capacity MT Received on MT Received on During 139 th OCC Meeting issues were raised for requirement of the monitoring of fuel availability at different generating stations. OCC decided that all the utilities shall provide the details of fuel stock one month in advance in the OCC meeting and later on weekly and day ahead basis information would be sought. States may like to provide details about implementation of the same. Table below shows comparison of Plant Availability Factor (PAF) for central sector stations for last three years (data is taken from Regional Energy Account). It is clear that PAF is considerably lower for Dadri-II TPS, Jhajjar TPS, Auraiya TPS, Dadri TPS, Rihand-II STPS, Dadri GPP, Anta GPP etc. for the year 2017 as compared to the year

23 Generating unit (Capacity in MW) September PAFM (%) PAFM difference ANTA GPP (419) AURAIYA GPP (663) DADRI GPP (830) DADRI TPS (840) DADRI-II TPS (980) JHAJJAR (1500) RIHAND-II STPS (1000) * *Rihand Unit-II 500MW capacity was under annual maintenance from (Source: NRPC Regional Energy Account) It is known that high demand is experienced in September month and several communications & discussions in OCC Meetings were carried out by NRPC/NRLDC in this regard. Even then, low availability of thermal/gas generating stations predominantly due to coal/fuel shortage & other issues was observed in September, this year. Utilities may like to provide reasons for lower Plant Availability Factor observed in September this year & actions taken to improve PAF of plants. Members may please discuss. 23 Prolonged outage of transmission elements As per data available with NRLDC following elements are under prolonged outage: S.No Name of Element Owner /220kV 80 MVAR Makhu B/R 1 400/220kV 315 MVA Auraiya ICT 2 400/220kV 50 MVAR Merta B/R 1 400kV Bamnauli- Jhatikara 1 400/220kV 315 MVA Kalisindh ICT FACT at BLB in Kanpur- Ballabagrhline 400/132kV 100 MVA Anpara ICT 2 PSTCL PGCIL RRVPNL DTL RRVPNL PGCIL UPPTCL Outage Date & Time & 12: & 04: & 09: & 20: & 15: & 10: &20:25 Reason Y-Ph tan delta test results not within limits Oil leakage in transformer dismantling this 50 MVAR Bus Reactor(this reactor shall be shifted to 400kvBhilwara)and replacing /commissioning with new TBEA make 125 MVAR Bus Reactor at Merta Tower collapse Buchholz relay operated Y-Phase current imbalance DGA test values are poor 23

24 FSC (40%) of Fatehpur-I at MainpurI(PG) FSC (40%) of Fatehpur-II at MainpurI(PG) 400kV Bawana- Mundka 1 & 2 400/220kV 500MVA ICT at Bhadla 400kV Dhanonda- Jhajjar CLP-1 & 2 400/220kV 500 MVA Rajpura ICT 3 FSC ( 50% ) of Koteshwar Pool -2 at Meerut (PG) 400/220kV 500 MVA Dhuri ICT 2 400/220kV 500 MVA Maharanibagh ICT 2 PGCIL PGCIL DTL RRVPNL HVPNL PSTCL PGCIL PSTCL PGCIL & 07: & 13: & 09: & 07: & 15: & 07: & 19: & 10: & 16:19 B-ph spark gas cable fail B-ph Capacitor unbalance Fire below 400kV tower no. 116, tower damage Buchholz, PRV & Differential protection operated Tower collapsed Buchholz relay operated / Detail inspection work Fire in Y-ph unit Buchholz relay operated / will replace by new. due to flashover in ICT-II Gas chamber Utilities may apprise about the present status, action plan, and remedial measures being taken for revival of these elements. Members may please like to discuss. 24 Delay in bringing machines at Auraiya & Dadri gas stations As per Format AS3 provided to NRPC by NTPC, the start-up time of Auraiya GT & ST from cold start is 23 minutes & 220 minutes respectively & start-up time of Dadri GT & ST from cold start is 75 minutes & 270 minutes respectively. Considering high demand & nonavailability of adequate generation in Northern Region grid the machines were to be brought on Liquid & RLNG fuel on 11 Sept NRLDC request to bring machines under reserved shut down at Dadri & Auraiya GPS was conveyed to NTPC by as well as telephonically at 12:37 hrs. But till 18:00hrs only one GT each at Auraiya & Dadri was synchronized. Due to delayed synchronization of machines the purpose of bringing machines was not fulfilled. NTPC may kindly inform about submission of the same. NTPC may like to elaborate the reasons for delay in synchronization of Auraiya & Dadri units on the said date. In another instance, Dadri-Gas plant declared DC of 730MW from The machines were generating MW only as per schedule given to them and other machines were out on low demand. On , at 11:51hrs, Dadri & other gas stations were informed by NRLDC to bring machines from 16:00hrs. However, at 15:53hrs, Dadri informed that due to seal oil problem of ST2, they are required to take ST2 under shutdown. The DC of Dadri-Gas 24

25 was also reduced w.e.f. 17:00hrs from 725MW to 655MW. NTPC may please clarify the reasons for above. NTPC representative had stated in 138 th OCC that the start-up time of GT & ST varies in different conditions & it was decided NTPC would submit details regarding different start-up times of GT & ST for gas stations. Expert group constituted by MoP with members from CEA, POSOCO, NTPC & GAIL have carried out studies for utilization of gas generation for peaking requirement. In such a case, it would be of utmost importance to beforehand have knowledge of start-up time of various GT & ST for different conditions. Members may please discuss. 25 Under generation by ISGS on continuous basis The month of September, October are generally accompanied with high demand period & especially high inter-regional import. In such scenario, under-generation by NR ISGS results in higher import on inter-regional paths (ATC/TTC violations) & poor frequency profile. This issue has been highlighted in previous OCC meetings however it has been observed that some generators have generated less than their schedule on regular basis. Some of these generators are: IGSTPP Jhajjar Unchahar TPS Dadri Gas Anta Gas The generating utility may like to state reasons for under generating as shown from graphs above & actions taken at their end to avoid such actions in future. Members may kindly discuss. 25

26 26 Hydro generation beyond 100% of installed capacity Hon ble Central Electricity Regulatory Commission (CERC) has notified 5 th amendment to the CERC (Indian Electricity Grid Code) Regulations, 2010 on 12 th April 2017 which has come into effect from 01st May The same was communicated to all entities vide NRLDC letter No. NRLDC\SO-117\ dated 21 st June 2017 to all constituents of Northern Region. The amended Regulation 5.2 (h) of Part 5 of the Principal Regulations is again quoted below: "For the purpose of ensuring primary response, RLDCs/SLDCs shall not schedule the generating station or unit (s) thereof beyond ex-bus generation corresponding to 100% of the Installed capacity of the generating station or unit (s) thereof. The generating station shall not resort to Valve Wide Open (VWO) operation of units whether running on full load or part load, and shall ensure that there is margin available for providing Governor action as primary response Exception to above rule has been granted by Hon ble CERC for hydro stations during the period of spillage. NRLDC shift engineers have been continuously asking hydro generators about possibilities of spillage if any. However, it has been observed that some of the generating stations who are selling power through LTA/MTOA/STOA arrangements are giving schedules or generating in excess of limits (corresponding to installed capacity on bar) specified through above regulation for a significant duration on many days without having spillage conditions (inferred from the total generation for the day). Therefore, in the month of October when spillage is not there all generators shall declare/generate as per their capabilities. Non-compliance of the same would be treated as violation of the regulation 5.2(h) of IEGC Regulations. Figures attached as Annexure-26 show some regional hydro generators which have generated more than their installed capacity (% w.r.t I.C.) during some part of the day in first 10 days of October month. These are listed below. Rampur (109%) Karcham Wangtoo (108%) Tehri (106%) Nathpa Jhakri (106%) Tanakpur (106%) Sewa-II (105%) In some cases this excess generation can be due to governor action. However, in most of the cases it appears that hydro generators have intentionally generated in excess. Utilities may please give explanation for such generation pattern even in the month of October when there is not the possibility of spillage of water. Members may kindly discuss. 26

27 27 Overdrawl by states and low frequency in grid On 3 rd October 2017, considerably low frequency was observed throughout the day. It is clear from the graphs below that Haryana, HP and UP was overdrawing from the grid (deviation from schedule) and at the same time considerably low frequency was observed Frequency profile for 3 rd of Oct 2017 is shown below. <49.2 <49.7 <49.8 <49.9 < >50.2 > Frequency remained below Hz for 84.57% of time & in the band for 69.75% of time. Fig. below shows frequency and deviation of states for 3 rd of Oct

28 Rajasthan state control area has also been overdrawing for last 10 days. Fig. showing overdrawl (deviation from schedule) by Rajasthan for last 10days is attached below. HP, Haryana, Rajasthan & UP may like to explain overdrawl highlighted above & actions taken to avoid such instances in future. Deviation from schedule of all NR states for last 15 days is shown below: 28

29 It could be observed from above, that most of the states are deviating from their schedule. The issue has been almost regularly discussed in OCC meetings and other forums. Constituents may share the remedial measures to arrest such large and almost continued deviation from the schedule. Members may please like to discuss. 28 Tap optimization in Northern Region Based on last year SCADA data available at NRLDC, nodes were identified were high voltages are observed. 765/400kV & 400/220kV nodes at which tap change exercise which will be of significant advantage to the grid have been identified using simulation studies on PSSE software and are listed below. 400/220 kv ICTs- Tap Change from 9b to 11 S. No. Region State Nodes 1 NR-1 Delhi Maharani Bagh, Mandola 29

30 Tap Change from 9b to 11 2 NR-2 Rajasthan Haryana Himachal Pradesh Jammu & Kashmir Punjab Akal Jodhpur Abdullapur, Bahadurgarh, Ballabhgarh, Bhiwani (BBMB), Daulatabad, Dipalpur, Fatehabad, Gurgaon, Kabulpur, Manesar, Nuhiyanwali, Panchkula, Sonepat Chamera-Pooling Hamirpur Kishenpur Amritsar, Dhuri, Jalandhar, Ludhiana, Makhu, Malerkotla, Moga, Muktsar, Nakodar, Patiala, Rajpura 3 NR-3 Uttar Pradesh Azamgarh, Lucknow (UP), Meerut, Sohawal Tap Change from 9b to 13 1 NR-1 Delhi Rajasthan 2 NR-2 Haryana Himachal Pradesh 765/400 kv ICTs- Bawana Bhiwadi, Neemrana, Sikar Kaithal Nallagarh S. No. Region State Nodes Tap Change from 12 to 10 1 NR-2 Haryana Bhiwani (PG) Tap Change from 12 to 8 2 NR-3 UP Meerut (PG) States may like to present their studies/suggestions in this regard as was requested in 139 th OCC Meeting. Members may please like to discuss. 29 Reliability Issues: Punjab: High loading of 400/220kV Amritsar, Ludhiana, Malerkotla, Makhu has been observed during high import from grid. Underlying network of Amritsar, Ludhiana, Dhuri & Jalandhar are also loaded and need attention to take care of any N-1 contingencies in this area. 500MVA ICT2 at Dhuri out since & 500MVA ICT3 at Rajpura (only one 500MVA ICT now supplying load) out since need to be revived. Haryana: N-1 non-compliance was been observed at Kaithal. Kirori ICTs also become N-1 non-compliant when load of Haryana is more than 9.5 GW. Isolator rating issues at Dhanonda & Nawada, Outage of 400kV Jhajjar- Dhanonda D/C on tower collapse also pose challenge to evacuation of HVDC Mundra-Mahendergarh / CLP Jhajjar. Rajasthan: High loading of 400/220kV Sikar, Akal has been observed. N-1-1 noncompliance of Kawai-Kalisindh-Chhabra complex has been continuously flagged and discussed in regular OCC/TCC meetings. N-1 non-compliance at 400/220kV Jodhpur and Merta S/s needs to be attended. Simulation studies may be carried out to identify alternate paths for supplying power at underlying n/w of Jodhpur & Merta to make ICT loading N-1 compliant before high demand in winter is experienced. 30

31 High voltage at Suratgarh, Akal & Jodhpur area has also been observed and reported continuously. Uttar Pradesh: N-1 non-compliance has been observed at 400/220kV ICTs of Azamgarh, Moradabad, Meerut, Obra, Muradnagar, Agra (UP), Lucknow (PG), Lucknow (UP), Gorakhpur (PG) etc. Evacuation issue of Lalitpur/Paricha & Bara TPS under N-1-1 contingencies is still present. Evacuation issues of Anpara-D/Anpara-C under N-1 contingency of 765kV Anpara C-Unnao. Low voltage at 400kV Sultanpur, Gorakhpur, Azamgarh & various 220kv nodes has been observed. As reported by UPPTCL CT/CB/Isolators of Dadri bays installed at 400kV Greater Noida S/s are designed for 2000A only, with ambient temperature at 42 C & above the current carrying capacity of above equipments goes down further. Similarly at Dadri end the CT capacity is 2000A only & at 400kV Nawada also the rating of CTs/CBs/isolators installed for Nawada- Greater Noida line are of rating of 2000A only. Commissioning of 400kV Gr.Noida- Gr. Noida (Existing S/s) has slightly relieved the loading of 400kV Dadri-Greater Noida line. Flow of 400kV Dadri-Gr. Noida is largely affected by generation at Tehri and Koteshwar. When generation at Tehri and Koteshwar is high, power flow from Meerut Mandola Dadri is substantially more whereas when generation at Tehri and Koteshwar is low, power flow from Meerut Mandola Dadri is on the lower side. Thus, when generation at Tehri & Koteshwar is high, flow on Dadri-Gr. Noida increases. Gr. Noida-Nawada was opened on no. of occasions to control the loading of Dadri-Gr. Noida. Delhi: 400/220kV ICT loading at Bamnauli. Bus split at Bamnauli leads to asymmetrical loading and thus N-1 non-compliant. Tower collapse of Bamnoli-Jhatikara#1 (other ckt is on ERS), outage of 400kV Bawana-Mundka D/C affecting the reliability of 400kV Delhi ring. Uttarakhand: Loading on 400/220 kv Kashipur ICTs is not N-1 compliant in case of high import (Gas generation at interconnection of 220kV Kashipur would relief the loading of Kashipur ICTs) & Loading on 220 kv Roorkee (PG) Roorkee. Telemetry issue for Uttarakhand as well. Jammu & Kashmir: N-1 non-compliance of 400/220kV Wagoora ICT, underlying 220kV network of Wagoora, Kishenpur) in Kashmir area. 30 Reliability of telemetry Real time data availability at control centers (RLDC) is of utmost requirement and due priority for restoration needs to be attached to this activity. However, it is observed that the telemetry issues even at the level of 400 kv and above system are not attended and remain unavailable for long period. Telemetry from Suratgarh Critical TPS is yet to be made available though the station has been charged without even having a plan for data communication. Data from 400kV Kashipur (Communication Issue) is not available since 13 th August, 2016, Chabra TPS (Gateway Faulty) is not available since 25 th June, 2017 and Salal HPS (Communication issue) telemetry failed on 29 th August, Telemetry for all these stations is still to be made available. 31

32 Further, the stations are coming up without any communication planning and ad-hoc arrangements are being made for making the data available which are not at all reliable. Apart from above, no action is being taken for improvement in the reliability of telemetry from important substations and generating stations. It is desired that the communication plan needs to be tied up when stations are planned. Serious effort should be made for improving the reliability of data telemetry. Member may kindly discuss. 31 SPS operation in the month of Sep To improve the reporting and analysis of SPS related operations, the following was proposed in 138 th OCC meeting: S. No. Reporting of SPS details within 3days of SPS operation. Submission of monthly SPS operation details for a month by 5 th date of the following month. A format for monthly submission of information is as below: Date (ddmmmyy) Time (in hrs) Format for Monthly SPS operation: Event Description SPS logic Planned operation Actual operation Relief occurred (MW) Remarks It is once again discussed in 139 th OCC meeting but compliance is still very low from most of the NR utilities. Details of SPS operation for the month of Sep-2017 is still pending from all the utilities except Rajasthan. Rajasthan has submitted the details only for two incidents. List of the SPS operation along with status of the report is tabulated below: S. Reason / Status of SPS Report submission No Element Name Type Voltage Level Owner Outage Antecedent As per planned Date Time Remarks Power Flow SPS operation Punjab Haryana Rajasthan UP Delhi POWERGRID Case-2 Reported 1 Balia-Bhiwadi Transient fault Bipole power operated; Load load relief: Line 500 kv HVDC PGCIL :41, km order: shedding in A, MW Pole 1 & 2 from Balia 1000MW B, C & load against group 170MW 2 Balia-Bhiwadi Pole 1 & 2 Line 500 kv HVDC PGCIL :12 Transient fault at kms from Balia Utilities may kindly share the details and discuss. Bipole power order: 600MW Case-1 operated; Load shedding in C & load group Reported load relief: 57MW against 120MW

33 A planned SPS detail of HVDC Balia-Bhiwadi is as below: Case Contingency Action Case-1 Tripping of pole resulting in power order reduction by more than 500 MW and up to 750 MW. (Measured at Bhiwadi) Shed Loads in Groups C & D (of Fig 1 Load Details). Case-2 Tripping of pole resulting in power order reduction by more than 750 MW and up to 1500 MW. (Measured at Bhiwadi) Action-1:- Shed Loads in Groups A, B, C & D as Described (of Fig 1 Load Details). Action-2:- Automatically back down generation by 250 MW at Singrauli-Rihand complex in Northern region and by 250 MW in the Eastern region at Kahelgaon in the shortest possible time Case-3 Tripping of poles resulting in power order reduction above 1500 MW and up to 2000 MW.(Measured at Bhiwadi) Action-1:- Shed loads in Groups A, B, C, D, E & F (of Fig 1 Load Details). Action-2:- Automatically back down generation by 750 MW at Singrauli-Rihand complex in northern region and by 750 MW in the eastern region at Kahelgaon/ Barh/ Farakka in the shortest possible time. Case-4 Tripping of poles resulting in power order reduction above 2000 MW. (Measured at Bhiwadi) Action 1:- Shed loads in Groups A, B, C, D, E, F & G (of Fig 1 Load Details). Action 2:- Automatically back down generation by 750 MW at Singrauli-Rihand complex in northern region and by 750 MW in the eastern region at Kahelgaon/ Barh/ Farakka in the shortest possible time. Remark: 1. The envisaged automatic backing down of generation in the Singrauli-Rihand complex for Case-2 is yet to be implemented. 2. Load Shedding shall be achieved within 500ms, including all signal propagation / breaker opening time delay 33

34 32 Frequent forced outages of transmission elements The following transmission elements were under frequent forced outages during the month of Sep 17: S. No. Element Name No. of forced Utility outages 1 HVDC Champa(WR) - Kurukshetra(NR) line-1 8 POWERGRID 2 HVDC Champa(WR) - Kurukshetra(NR) line-2 6 POWERGRID 3 HVDC 800kV Agra - Biswanath Cherialli line-1 5 POWERGRID 4 400kV Aligarh(UP)-Muradnagar(UP) 4 UP 5 400kV Bikaner(RVPNL)-Merta(RVPNL) 4 Rajasthan 6 HVDC 500kV Balia-Bhiwadi line-2 4 POWERGRID 7 765kV Agra(PG)-Fatehpur(PG) ckt-2 3 POWERGRID 8 Banda(UP), 400/220kV 315 MVA ICT 1 3 UP 9 400kV Bareilly(PG)-Kashipur(PTCUL) ckt-1 3 POWERGRID/Uttarakhand kV Bhadla(RVPNL)-Bikaner(RVPNL) ckt-1 3 Rajasthan The complete details are attached at Annexure-32. Further, the list of ten most frequent transmission element outages since Apr 17 included in OCC meetings is as below: S. No. 1 Transmission line No. of forced outages Utility 800kV HVDC Champa(WR) - Kurukshetra(NR) line POWERGRID 2 400kV Agra(UP)-Unnao(UP) 21 UP 3 HVDC Vindhyachal BtB Block-1 11 POWERGRID 4 400kV Bikaner(RRVPNL)-Merta(RRVPNL) 11 Rajasthan 5 400kV Aligarh(UP)-Muradnagar(UP) 10 UP 6 400kV Aligarh(UP)-Sikandrabad 400(UP) ckt-2 8 UP 7 800kV HVDC Agra(PG)-Biswanath Cherialli (PG) line-2 7 POWERGRID 8 NHPC/ 132kV Mahendranagar(ER)-Tanakpur(NHPC) 7 POWERGRID/ Nepal 9 400kV Dhuri(PSTCL)-Rajpura(PSTCL) ckt-2 7 Punjab kV Agra-Fatehpur(PG) ckt-2 6 POWERGRID It could be seen that issues like no auto-reclosing, mal-operations, delayed clearance of fault are observed in most of the cases. The frequent outages of such elements affect the reliability and security of the grid. Hence, Utilities are requested to look into such frequent outages and share the remedial measures taken/being taken in this respect. Members may discuss. 34

35 33 Tripping of 400kV and above transmission elements on DT (Direct trip) The following transmission elements were tripped from Sep-2017 onward: S. Voltage No. Level LINE NAME End B (Ownership) TRIP DATE RESTORATION DATE Outage Duration Reported Reason Remarks (As per PMU data) kv Agra-Gwalior -2 PGCIL 01/09/17 21:51 01/09/17 22:19 00:28 DT received at Agra end No fault kv Aligarh - Panki UPPTCL 07/09/17 12:31 07/09/17 17:44 05:13 DT recvd at Aligarh No fault kv Fatehabad-Nuhiyawali 2 HVPNL 13/09/17 12:01 13/09/17 17:15 05:14 DT received at Fatehabad end due to PLCC maloperation at Nuhiyawali. No fault kv Gorakhpur(PG)- DT received at Gorakhpur. Detailed PLINK 21/09/17 11:40 21/09/17 13:14 01:34 Lucknow(PG) 2 report awaited. B-phase to earth fault kv Bikaner-Merta RRVPNL 21/09/17 20:40 22/09/17 00:39 03:59 DT received at Merta end. No fault kv Bikaner-Merta RRVPNL 22/09/17 06:44 22/09/17 17:55 11:11 DT received at Bikaner No fault 7 G.Noida 765(UP)-Mainpuri 765 kv UPPTCL 765(UP) 27/09/17 11:38 27/09/17 15:41 04:03 DT recd at 765kV G. Noida end. B-phase to earth fault 8 Fatehabad 765(UP)- 400 kv Mathura 400(UP) 1 UPPTCL 27/09/17 17:36 27/09/17 18:22 00:46 DT received at Mathura end. No fault kv Jalandhar(PG)-Samba(PG) NRSS /09/17 11:42 28/09/17 11:53 00:11 DT received at Jalandhar. No fault kv Bikaner-Merta RRVPNL 28/09/17 23:08 28/09/17 23:44 00:36 DT received at Bikaner No fault kv Ratangarh-Suratgarh 1 RRVPNL 30/09/17 08:00 01/10/17 23:23 39:23 Tripped due to DT received at STPS end. No fault kv Aligarh(UP)-Mainpuri 765(UP) 2 UPPTCL 02/10/17 21:41 03/10/17 01:10 03:29 DT Received at Mainpuri kv Bikaner-Merta RRVPNL 04/10/17 10:30 04/10/17 11:45 01:15 DT received at Bikaner No fault kv Bikaner-Merta RRVPNL 04/10/17 19:45 04/10/17 22:07 02:22 DT received at Bikaner No fault kv Koldam(NTPC)- Ludhiana(PG) -2 PKTCL 10/10/17 10:28 10/10/17 13:57 03:29 DT received at Koldam end. No fault No fault, Before the incident there was fault at 21:39hrs It may be due to PLCC problem at either end of the line and same needs to be looked into by all the concerned utilities. Utilities may kindly share the details and discuss. 34 Multiple element tripping events in Northern region in the month of Sep-2017: A total of 18 grid events occurred in the month of Sep Out of these, 9 no. of events were of GD-1 category. The preliminary report of all the events have been issued from NRLDC. A list of all these events along with the status of details received is attached at Annexure-34. It could be seen that a fault clearance of the order of 1720ms {22 nd Sep 2017: Multiple element tripping at 400/220kV Lucknow (UP)} has been observed which is very much exceeding the standard value of 100ms. Further, despite persistent discussions/follow-up in various OCC/PCC meetings, the compliance of the regulations is still much below to the desired level. The summary of the attached table is as below: Preliminary Report or DR/EL received within 24hrs: 3 events DR/EL received after 24hrs: 8 events Fault clearance time (based on PMU data) more than CEA grid standard: 8 events Line tripping without any fault (based on PMU data): 3 events 35

36 Consolidated status plots are as below: 36

37 37

38 Members may take expeditious actions to avoid such tripping in future and discuss the same. Moreover, utilities may impress upon all concerned for providing the Preliminary Report, DR/EL & Detailed Report of the events in line with the regulations. Members may like to discuss. 35 Details of tripping of Inter-Regional lines from Northern Region for Sep 17: A total of 29 inter-regional lines tripping within a month occurred in the month of Sep 17. The list is attached at Annexure-35. The status of receipt of preliminary reports, DR/EL within 24hrs of the event and fault clearing time as per PMU data has also been mentioned in the table. The non-receipt of DR/EL & preliminary report within 24hrs of the event is in violation of various regulations. As per regulations, all the utilities shall furnish the DR/EL, flag details & preliminary report to RLDC/RPC within 24hrs of the event. They shall also furnish the detailed investigation report within 7 days of the event if fault clearance time is higher than mandated by CEA (Grid Standard) Regulations. It could be observed from attached table that not all information regarding the tripping is received from the utilities. The summary of the attached table is as below: Preliminary Report or DR/EL received within 24hrs: 2 events DR/EL received after 24hrs: 1 events Line tripping without any fault (based on PMU data): 6 events 38

39 Consolidated status plots are as below: Members may please note and advise the concerned for taking corrective action to avoid such trippings as well as timely submission of the information. 36 Mapping of UFR and df/dt: The last status of UFR & df/dt discussed during 139 th OCC meeting is tabulated below: States UFR df/dt Remarks J&K No No Following not provided: Feeder-wise planned load relief. Complete telemetry of feeders. UP Yes Yes Alternate feeders. Total planned relief. (Stage wise) Total actual relief. (Stage Wise) Following not provided: Feeder wise planned load relief. Yes Complete telemetry of feeders. (Only Haryana Yes stage- Alternate feeders for both UFR and df/dt. 1) UFR Stage nomenclature needs to be modified (Stage- 1: 49.2Hz) Total actual relief. Following not provided: Delhi Yes Yes Total of actual analog data of MW and alternate feeders. Data suspected for most of the digital and Analog value Following not provided: Complete telemetry of feeders. HP Yes Yes Complete Alternate feeders. Segregation of stage wise load Uttarakhand No No Punjab Yes Yes Following not provided: 39

40 Rajasthan No Yes Complete telemetry of feeders. Alternate feeders. Digital Status of all the feeders Lower actual load relief (As per SCADA data) Following not provided: Analog value and digital data not available Only alternate feeder details provided The UFR and df/dt mapping is mandatory as per Hon ble CERC regulation. The issue has been discussed in various OCC, NRPC-TCC meetings. However, it could be seen that the State UFR, df/dt displays are not exactly as per the approved format. In 137 th OCC meeting, MS NRPC once again reiterated that mapping of UFR has to be done in the SCADA of SLDC & NRLDC for better visibility of relay status and feeder load relief and emphasized upon the importance of digital breaker status of feeders in such defense schemes. In 136 th & 137 th OCC meeting, it was discussed that in addition to the SCADA mapping, States should provide the following information regarding the UFR, df/dt relays installed at their respective substations: Source of frequency measurement for UFR, df/dt relay viz. positive sequence, phaseto-neutral, phase-to-phase. Computational time for measurement of frequency, rate of change of frequency in UFR, df/dt relays respectively. State utilities are requested to submit the above information at the earliest and correct, provide the SCADA UFR, df/dt displays as per the comments. In 139 th OCC meeting, one to one VC with individual SLDC (similar to one to one interaction for FRC) was planned for better understanding and use of SCADA display of UFR and df/dt mapping. Proposed schedule versus actual status for one to one VC is as given: S. No. SLDC Date Time Status 1 Punjab :00Hrs Done 2 Haryana :00Hrs Done 3 Delhi :00Hrs Done 4 Uttar Pradesh :00Hrs Done 5 Rajasthan :00Hrs 04 th Oct Uttarakhand :00Hrs To be done 7 Himachal Pradesh :00Hrs Done 8 J&K :00Hrs Mail sent, VC facility not available 9 Chandigarh :00Hrs To be done 40

41 Important outcome during VC of UFR and df/dt is as below: Punjab: Punjab has already planned for complete availability of telemetry of 132kV and above voltage level. Lower voltage level at these stations would also be covered. RTU would be installed at 50% of the 220 & 132kV station till March RTU would be installed at 100% of the 220 & 132kV station till December No telemetry available at 66kV remote end sub-stations. Haryana: SLDC-Haryana representative informed that they would take corrective actions for availability of Analog and digital data in SCADA display of UFR and df/dt. Approved Target date : 30th Oct 2017 Delhi: Low percentage of availability of analog/digital data in SCADA display may be due to ICCP mapping of data points. It would be taken care by SLDC-Delhi. Uttar Pradesh: Name of the feeders was properly updated in the SCADA mapping but analog data and digital data was not available for most of the main feeders. Name and SCADA data of alternate feeders was also not mapped. UP SLDC informed that to obtain adequate relief during actual incident more no. of feeders are designated to provide relief. 35 number of 220kV sub-station would be completed by Mar-2018 & 30 number of 220kV sub-station would be completed by Dec For remaining 220/132kV or 132/33kV stations, scheme yet to be planned. Himachal Pradesh: Name of the feeders and alternate feeders was properly updated in the SCADA mapping of UFR relays but analog data and digital data was not available for most of the main feeders of UFR relays. Alternate feeders/ ICTs details shall also be updated in SCADA mapping of df/dt relays. Designated load relief for df/dt stage-2 was lower than the stipulated relief. No telemetry available at 33kV substations except Open Access consumer. New scheme for installation of RTU in 37 locations of 66kV has been submitted under PSDF scheme. Rajasthan: Name of the feeders and alternate feeders was properly updated in the SCADA mapping but analog data and digital data was not available for most of the main feeders. New RTU installation work has been awarded for 68 important 132kV stations. Target completion date is Mar New scheme for installation of RTU in location of 132kV stations is under planning stage. Rajasthan SLDC informed that to obtain adequate relief during actual incident more no. of feeders are designated to provide relief and the same are also mapped in SCADA. RLDC suggested all the constituents to segregate the 33kV based locations of UFR and df/dt relays in following three stages: Where already RTU installed at 132kV stations, wiring of 33kV feeders to RTU to be done. The work targeted to be completed within three months. Where new 65 RTUs installed at 220kV stations, 33kV and above feeders covered under UFR and df/dt to be wired on priority basis. Where new scheme to be approved for remaining location of 220kV & 132kV stations, expedite the scheme and also cover the remaining 33kV and above feeders at least those covered under UFR, df/dt scheme and SPS. Detailed discussion points outcome during VC is attached as Annexure

42 State utilities are requested to submit the information asked in the Annexure-39 at the earliest possible. Also correct the SCADA UFR, df/dt displays as per the comments. Member may kindly discuss. 37 EHV line tripping due to fog during winter: As discussed in 139 th OCC meeting, In order to avoid tripping of EHV line during foggy (Smog) weather in winter, preventive actions like cleaning/washing of insulator, replacement to insulators with polymer one etc. have been recommended and being done. In order to have proper information about the lines wherein such actions have been taken, it had been repeatedly agreed in OCC/TCC meetings, to update line wise data for insulator replacement and cleaning. The lines details as well as format had been shared last year during winter but detail in desired format is yet to be received from the utilities. Format is as below: Status of replacement of Porcelain insulators with Polymer insulators As on- S.No. Name of Line/voltage / S/C or D/C Voltage Level (in kv) Total Length of line (in km) Line details Total Towers location (Nos) Total Insulator Length Strings (km) (Nos) Insulators to be replaced by Polymer (Target for this year) Total Towers Locations (Nos) Total Insulators Length Strings (in km) (Nos) Progress (Work already completed) Total Towers Locations (Nos) Total Insulators Strings (Nos) Schedule for completion of Replacement Start Date End Date Remarks (If only partial location of the line has planned then may please indicate the location numbers or part kms of line which have been planned) Note: 1. Line constructed with Polymer Insulator may please also be indicated in the table 2. Similar separate table shall be formulated for Anti-fog insulators line as well for line which would be cleaned 3. Lines for whom there is no planning of cleaning or replacement may please also be given in the table but with '--' in planning as well as progress columns Detailed Format and Line details were attached as Annexure-23C of 139 th OCC Agenda. It is a matter of concern that no one has submitted the details till now. It is once again requested to all the members to kindly share the details by 20 th Oct Revision of document for Reactive Power Management for Northern Region: As discussed in 139 th OCC meeting, Reactive Power Management document for Northern region is due for revision. The last updated document link is as below: Document is password protected and password was already informed to all the NR constituents through letter dated 30 th Dec

43 For revision in the document, following information needs to be updated in desired format: List of 765kV, 400kVand 220kV transmission line List of Line reactors List of Bus Reactors List of FSC/TCSC& SVC List of tertiary reactors on 33kV side of 400/ 220/ 33 kv ICT s. List of shunt capacitors OLTC details of ICT s Generator transformer tap details List of Over Voltage setting of 400kV & above transmission line Generator reactive power capability curve for Generating stations Filters details of HVDC Agra-BNC & HVDC Champa-Kurukshetra and different mode of operation. Formats were attached as Annexure-36 of 139 th OCC Agenda. Constituents may kindly provide the feedback, suggestion and updated information by 20 th October Revision of document for System Restoration Procedure (SRP) for Northern Region: As discussed in 139 th OCC meeting, System restoration procedure for Northern region is due for revision. The last updated document link has already been shared with the constituents. Constituents are requested to go through the document and provide any modification/addition in respect of their system. SLDC/Generating utilities are requested to kindly update and share the restoration procedure in respect of their state/generating station. Constituents may kindly provide the feedback, suggestion and updated information by 20 th October Workshop on System restoration and Power transfer capability assessment: As informed in 139 th OCC, NRLDC has planned to organize the following one day workshops: a) One day workshop on system restoration in Northern Region on 10 th Nov Representatives from all power stations are requested to be present in the workshop & share details regarding the following: Healthiness of Diesel Generator(DG) sets at black start sources Capability curve of the black start generator Governing system at generating stations for frequency control Experience of black start exercise conducted recently Representative from Railways are also requested to be present & share latest details regarding traction feeding points, traction load, provision for phase balancing (Scott Connection) & contact details of nodal persons etc. 43

44 Representatives from generating stations, transmission utilities (ISTS), SLDCs, ALDCs are requested to participate & share the relevant details in respect of their system as under. Updated directory of key personnel for Crisis Management Power Map for States One or two state representative may prepare presentation for restoration procedure of their state and share the details during the workshop. No nominations have been received in this regard from any of the constituents. It is once again requested to nominate suitable officers for the workshop. b) One day workshop on system studies and ATC/TTC assessment is being organized on 30 th Oct Importance of system studies is well known as same is being used for operational planning & studies (reactive compensation, shutdown coordination, Transfer Capability computations etc.) as well as for transmission charges sharing computation. NRLDC has communicated about the workshop giving brief details about the outline of workshop vide its letter NRLDC/TS-31/ dated It was requested to all the constituents to nominate 2-3 concerned officers for the workshop or inform if they would be connecting through video conferencing. No nominations have been received in this regard from any of the constituents. It is once again requested to nominate suitable officers for the workshop. 41 Deviation Violation The deviations from the schedule are to be minimized. Some of the violations brought out by the Regulations are given below: Violation of regulation 7 (1) of CERC (Deviation Settlement and related matters) Regulation 2014: (Limit on volume of deviation) Table-1: Period: to S.No. State 1 J&K 2 Uttar Pradesh 3 Himachal Pradesh 4 Rajasthan 5 Haryana 6 Uttarakhand O/D: Violation in Over drawl Average No of Blocks U/D: Violation in per day Under drawl O/D 54 U/D 7 O/D 50 U/D 11 O/D 45 U/D 13 O/D 33 U/D 13 O/D 27 U/D 9 O/D 17 U/D 28 44

45 7 Punjab 8 Delhi 0 Chandigarh O/D 15 U/D 13 O/D 3 U/D 11 O/D 0 U/D 17 Remarks: Violation is considered while Deviation from Schedule of a Utility is 150 MW or 12% of Schedule whichever is lower. Violation of regulation 7 (10) of CERC (Deviation Settlement and related matters) Regulation 2014: (Sustained deviation from schedule in one direction). 01- Sept- 17 to 24- Sept- 17 Total No. of Violati ons Chandi garh 144 PDD J&K Himachal Pradesh Del hi Uttarak hand Uttar Pradesh Rajast han Hary ana Punj ab Members may like to discuss and take action to avoid such violations. 45

46 POWERGRID CORPORATION OF INDIA LTD. NRLDC, New Delhi Frequency Profile During Sep-2017 Date % of Time Frequency Frequency (Hz) Average Standard <49.2 <49.7 <49.8 <49.9 < >50.10 >50.20 >50.50 FVI Maximum Minimum Frequency Deviation Freq Time Freq Time Max Min Average

47 POWERGRID CORPORATION OF INDIA LTD. NRLDC, New Delhi Voltage Profile During Sep-2017 Date 400 KV Rihand Voltage (KV) 400 KV Gorakhpur Voltage (KV) 400 KV Bareilly Voltage (KV) 400 KV Kanpur Voltage (KV) Maximum Minimum Maximum Minimum Maximum Minimum Maximum Minimum Voltage Time Voltage Time Voltage Time Voltage Time Voltage Time Voltage Time Voltage Time Voltage Time : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : :32: : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : :18 31 Max Min Average

48 Voltage Profile During Sep-2017 Date 400 KV Dadri Voltage (KV) 400 KV Ballabgarh Voltage (KV) 400 KV Bawana Voltage (KV) 400 KV Bassi Voltage (KV) Maximum Minimum Maximum Minimum Maximum Minimum Maximum Minimum Voltage Time Voltage Time Voltage Time Voltage Time Voltage Time Voltage Time Voltage Time Voltage Time : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : :40 31 Max Min Average

49 Voltage Profile During Sep-2017 Date 400 KV Hissar Voltage (KV) 400 KV Moga Voltage (KV) 765 KV Abdullapur Voltafe(KV) 765 KV Nalagarh Voltafe(KV) Maximum Minimum Maximum Minimum Maximum Minimum Maximum Minimum Voltage Time Voltage Time Voltage Time Voltage Time Voltage Time Voltage Time Voltage Time Voltage Time : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : :37 Max Min Average

50 Voltage Profile During Sep-2017 Date 400 KV Kishenpur Voltage (KV) 400 KV Wagoora Voltage (KV) 400 KV Amritsar Voltage (KV) 400 KV Kashipur Voltage (KV) Maximum Minimum Maximum Minimum Maximum Minimum Maximum Minimum Voltage Time Voltage Time Voltage Time Voltage Time Voltage Time Voltage Time Voltage Time Voltage Time : : : : : :28 0 0:00 0 0: : : : : : :14 0 0:00 0 0: : : : : : :03 0 0:00 0 0: : : : : : :08 0 0:00 0 0: : : : : : :04 0 0:00 0 0: : : : : : :33 0 0:00 0 0: : : : : : :23 0 0:00 0 0: : : : : : :09 0 0:00 0 0: : : : : : :17 0 0:00 0 0: : : : : : :17 0 0:00 0 0: : : : : : :55 0 0:00 0 0: : : : : : :38 0 0:00 0 0: : : : : : :15 0 0:00 0 0: : : : : : :16 0 0:00 0 0: : : : : : :40 0 0:00 0 0: : : : : : :42 0 0:00 0 0: : : : : : :24 0 0:00 0 0: : : : :07 0 0:00 0 0:00 0 0:00 0 0: : : : :35 0 0:00 0 0:00 0 0:00 0 0: : : : : : :47 0 0:00 0 0: : : : : : :23 0 0:00 0 0: : : : : : :36 0 0:00 0 0: : : : : : :10 0 0:00 0 0: : : : : : :10 0 0:00 0 0: : : : : : :18 0 0:00 0 0: : : : : : :21 0 0:00 0 0: : : : : : :08 0 0:00 0 0: : : : : : :39 0 0:00 0 0: : : : : : :12 0 0:00 0 0: : : : : : :21 0 0:00 0 0:00 31 Max Min Average

51 Voltage Profile During Sep-2017 Date 400 KV Hamirpur Voltage (KV) 400 KV Rishikesh Voltage (KV) 765 KV Fatehpur Voltage (KV) 765 KV Balia Voltage (KV) Maximum Minimum Maximum Minimum Maximum Minimum Maximum Minimum Voltage Time Voltage Time Voltage Time Voltage Time Voltage Time Voltage Time Voltage Time Voltage Time : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : :00 0 0:00 0 0: : : : : : : : : : : : : : :00 0 0:00 0 0: : : : : : : : : : : : : : :00 0 0:00 0 0: : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : :28 0 0:00 0 0: : : : :08 31 Max Min Average

52 Date 765 KV Moga Voltage (KV) 765 KV Agra Voltage (KV) 765 KV Bhiwani Voltage (KV) 765 KV Unnao Voltage (KV) Maximum Minimum Maximum Minimum Maximum Minimum Maximum Minimum Voltage Time Voltage Time Voltage Time Voltage Time Voltage Time Voltage Time Voltage Time Voltage Time :00 0 0: : : : : : : :00 0 0: : : : : : : :00 0 0: : : : : : : :00 0 0: : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : :03 0 0:00 0 0: : : : : : :14 0 0:00 0 0: : : : : : :28 0 0:00 0 0: : : : : : :36 0 0:00 0 0: : : : : : :16 0 0:00 0 0: : : : : : :20 0 0:00 0 0: : : : : : :42 0 0:00 0 0: : : : : : :45 0 0:00 0 0: : : : : : :19 0 0:00 0 0: : : : : : :00 0 0:00 0 0: : : : : : :14 0 0:00 0 0: : : : : : :05 0 0:00 0 0: : : : : : :08 0 0:00 0 0: : : : : : :39 0 0:00 0 0: : : : : : :08 0 0:00 0 0: : : : : : :22 0 0:00 0 0: : : : : : :09 0 0:00 0 0: : : : : : :18 0 0:00 0 0:00 31 Max Min Average

53 Date 765 KV Lucknow Voltage (KV) 765 KV Meerut Voltage (KV) 765 KV Jhatikara Voltage (KV) 765 KV Bareilly Voltage (KV) Maximum Minimum Maximum Minimum Maximum Minimum Maximum Minimum Voltage Time Voltage Time Voltage Time Voltage Time Voltage Time Voltage Time Voltage Time Voltage Time : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : :07 31 Max Min Average

54 Date 765 KV Anta Voltage (KV) 765 KV Phagi Voltage (KV) Maximum Minimum Maximum Minimum Voltage Time Voltage Time Voltage Time Voltage Time : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : :35 31 Max Min Average

55 SL. No Element Name Type Voltage Level Owner Outage Date Time Expected Revival Date Reason / Remarks 1 Auraiya 315 MVA ICT 2 ICT 400/220 kv PGCIL 7/6/2017 4: Oil leakage in transformer. 2 Makhu 80 MVAR B/Reactor 1 Bus Reactor 400 kv PSEB 2/5/ : Y-Ph. ten delta test results not within limits 3 Merta 50 MVAR (400kV) B/Reactor 1 Bus Reactor 400 kv RRVPNL : Construction of new element --- for dismantling this 50 MVAR Bus Reactor(this reactor shall be shifted to 400kv Bhilwara) and replacing/commissioning with new TEBA make 125 MVAR Bus Reactor at Merta. 4 Hisar(BBMB)-Sangrur(BBMB) 1 Line 220 kv BBMB :08 12/9/2017 Diverson of Line --- shifting / raising of height between TL due to electrification of Rohatak-Bhatinda section of railway by BBMB ( Deposit work of Rail Vikas Nigam.2. shifting / raising of height between TL , & due to four lining of Kaithal-Rajsthan Border Road.extended upto Hisar(BBMB)-Sangrur(BBMB) 2 Line 220 kv BBMB :34 12/9/ shifting / raising of height between TL due to electrification of Rohatak- Bhatinda section of railway by BBMB ( Deposit work of Rail Vikas Nigam.2. shifting / raising of height between TL , & due to four lining of Kaithal-Rajsthan Border Road.extended upto FSC of Pampore-1 at Kishnpr FSC 220 kv PGCIL :00 7 FSC of Pampore-2 at Kishnpr FSC 220 kv PGCIL :00 No requirement as on date No requirement as on date Line length has reduced after LILO work completion Line length has reduced after LILO work completion

56 SL. No Element Name Type Voltage Level Owner Outage Date Time Expected Revival Date Reason / Remarks 8 Bamnauli(DTL)-Jhatikara(PG) 1 Line 400 kv DTL : Bawana-Mundka 1 Line 400 kv DTL : Bawana-Mundka 2 Line 400 kv DTL : Tower damage (First dead end tower from Bamnauli S/S) / Ckt-II charge through ERS tower Fire below 400kV tower no. 116, in the line Manually Opened due to Fire below 400kV tower no. 116, in the line leading to Insulator damage and Tower bend 11 Mainpuri(PG)-Paricha(UPPTCL) -2 Line 400 kv UPPTCL : Tower collapsed 12 Dhanonda-Jhajjar CLP-2 Line 400 kv HVPNL : Dhanonda-Jhajjar CLP-1 Line 400 kv HVPNL : Tower No. 12 to 17 collapsed Tower No. 12 to 17 collapsed. 14 Kalisindh 315 MVA ICT ICT 400/220 kv RRVPNL 4/6/ : Buchholz relay operated. 15 Rajpura (400kV) 500 MVA ICT 3 ICT 400/220 kv PGCIL : Bhadla(RVPNL) 500 MVA ICT 1 ICT 400/220 kv RRVPNL 9/8/2017 7:02 NA 17 Dhuri(400) 500 MVA ICT 2 ICT 400/220 kv PSEB : Buchholz relay operated / Detail inspection work. Buchholz, PRV & Differential protn. optd. Buchholz relay operated / will replace by new.

57 SL. No Element Name Type Voltage Level Owner Date Outage Time Expected Revival Date Reason / Remarks 18 Wagoora 50 MVAR B/R Bus Reactor 400 kv PGCIL :56 No requirement as on date Taken out due to low voltage. 19 FACT at BLB in Knp-BLB Line FACTS 400 kv PGCIL 2/7/ : Y-Phase current imbalance 20 FSC (40%) of Fatehpur-I at MainpurI(PG) FSC 400 kv PGCIL 2/3/2017 7: B-Ph spark gas cable fail 21 FSC (40%) of Fatehpur-II at MainpurI(PG) FSC 400 kv PGCIL 7/5/ : B-ph Capacitor unbalance 22 FSC ( 50% ) of Koteshwar Pool - 2 at Meerut (PG) FSC 400 kv PGCIL : Fire in Y-ph unit 23 Kishenpur(PG)-Ramban(JK) Line 220 kv PDD JK :55 NA 24 Maharanibagh 500 MVA ICT 2 ICT 400/220 kv PGCIL 1/9/ : Tower collapsed at tower No. 82 from Kishenpur end as informed by SLDC Jammu Bus bar protection operated due to flashover in ICT-II Gas chamber

58 SL. No Station Location Owner Unit No Capacity Reason(s) Outage Date Time Expected Revival Date 1 RAPS-A RAJASTHAN NPC Badarpur TPS DELHI NTPC Badarpur TPS DELHI NTPC Badarpur TPS DELHI NTPC Bhakra-L HPS HP BBMB Subject to regulatory clearance Order of NGT for Environmental protection Order of NGT for Environmental protection Order of NGT for Environmental protection Replacement of Generator Shaft 9/10/ : :29-9/10/2015 1: :30-1/4/2016 9: Obra TPS UP UPRVUNL R & M work 1/7/ :44-7 Dehar HPS HP BBMB Rotor Earth Fault 2/5/ : Giral (IPP) LTPS RAJASTHAN RRVUNL Bad materials leakage. 11/7/2014 8: Giral (IPP) LTPS RAJASTHAN RRVUNL Boiler tube leakage : Bara PPGCL TPS UP Jaypee Generator Transformer protection operated 1/6/ : Harduaganj-C TPS UP UPRVUNL Generator Fault 2/7/2017 8:02-12 Chhabra TPS RAJASTHAN RRVUNL Turbine bearing problem 6/8/2017 7: Chhabra TPS RAJASTHAN RRVUNL Bus bar protection operated. 8/8/ : Guru Gobind Singh TPS (Ropar) PUNJAB PSEB Boiler tube leakage :00 -

59 Sl.No Name of State/Entity Name of Entity Name of Scheme Date of Sanction Accepted Cost (Crs) POWER SYSTEM DEVELOPMENT FUND STATUS OF IMPLEMENTATION Grant Approved (Crs) Date of release of 1st installment Completion schedule as per DPR (Months) Revised schedule (as committed on ) Award Status (in Crs) Funds disbursment status (Crs) Total Grant Fund Released Committed (on Awarded amount on (in Crs) ) award amount date Present Status 1 UPPTCL Installation of Capacitors and FSC. 11-May Mar Dec Request for disbursement of Rs. 15 Crores had been sent to NLDC.Entity intimated that on account of location change revision in the scheme is required. Inspection Pending. Uttar Pradesh UPPTCL UPPTCL Renovation and Upgradation of protection system of substations. Renovation and Upgradation of protection system of substations. 11-May Mar Dec Panels delivered & commissioned. Erection of CT, PT is completed. 17-Mar UPPTCL Reconductoring of 11 Nos of 132kV Lines of the state network of UPPTCL for Relieving Congestion 16-May RRVPNL Renovation and Upgradation of protection system of substations 31-Dec Mar Jun Project cost reduced to 39 Crs. Rs Crores had been spent. Bus Bar tender of amount of Rs Crores is pending. Rajasthan RRVPNL Installation of Bus Reactors 31-Dec Mar Jun RRVPNL Smart Operation Mamgement System (STOMS) 19-May Reactor reached at GSSMerta.Dismanteling work has been completed. Erection work in progress at Hindaun s/s. Reactor not reached. RRVPNL Communication Backbone "Smart Transmission Network & Asset Management System " 22-May Delhi DTL 4 Uttrakhand PTCUL Renovation and Upgradation of Protection System Renovation and Upgradation of Protection System 17-Mar Nov LoA for Rs.18 Crores issued. 17-Mar Nov Rs Crores contract is awarded. Rs. 10 Crores disbursed to Contractor. 5 PSTCL Bus bar protection 17-Mar Punjab PSTCL Provision of second DC Source at 220KV & 132KV Grid Sub Station 2-Jan Technical Bid opened on 25th August Haryana HVPNL Detailed Project Report Smart Grid Project Gurgaon City Fist Phase DLF Sub Station Area 2-Jan NIT under hold 7 PDD-J&K Jammu & Kashmir Renovation and Upgradation of protection system of substations in Jammu 28-Oct intuts rcvd from entities\j&k\psdf_review meeting_ _annexure-i - srinagar.docx PDD-J&K Renovation and Upgradation of protection system of substations in Kashmir 17-Mar Himachal Pradesh HPSEBL Renovation and Upgradation of Protection System 5-Jan May Jun Rs. 40 Crores contract is awarded. 9 PGCIL BNC-AGRA 10-Mar RECTPCL & PGCIL 11kV feeder monitoring 10-Mar CPSU PGCIL URTDSM Scheme 31-Dec Oct Jun Under completion DVC Renovation and Upgradation of the protection and control system of Ramgarh Sub Station. 2-Jan May intuts rcvd from entities\dvc\psdf_review meeting_ _annexure-i DVC Ramgarh Ss.docx 10 NRPC NRPC Study Program on the integration of renewable energy resources 16-May Mar Completed PSDF_STATUS OF IMPLEMENTATIONANNEXUREI (2) - Copy.xlsx Schme wise status

60 Format D4/1- Schemes under process of approval: Examined by the sub group Sl. No. Name of State/Entity Name of Entity & unique ID Date of Submission of Scheme by the Name of Scheme Estimated cost by entity ( Rs. Crore) Status I II III IV V VI VII 1 Punjab PSTCL 14-Mar-17 Reliable Communication and data Acquisition System upto 132kV Substation in Punjab. (138) Scheme examined in 32nd sub group meetin held on The entity was asked to submit the the revised under taking, BOD approval and network topology. Inputs awaited. 2 Uttar Pradesh UPPTCL 16-Sep-16 Implementation of Reliable Communication and data acquisition system for OFC connectivity up to 132kV sub Stations of Uttar Pradesh Power Transmission Corporation Ltd. (115) Scheme was discussed in the meeting held on Examined on The entity has sought time for submission of revised proposal. 3 Himachal Pradesh HPSEBL 23-Feb-17 Monitoring of real-time-data at SLDC / ALDC, Shimla to regulate the power flow of HP Grid by providing of communication equipment and Remort Terminal Units at identified locations. (135) Scheme examined in 32nd sub group meetin held on The entity was asked to submit the the BOD approval along with other required inputs. Inputs awaited. 4 Himachal Pradesh HPSEBL 23-Feb-17 Strengthening of Transmission System incidenatls to Inter-State- Transmission System in the State of HP (134) Scheme examined in 32nd sub group meetin held on The entity was asked to submit study report, tower healthiness report and other required documents. Inputs awaited. 5 Rajasthan RRVPNL 26-Apr-17 Renewable Energy Integration - Reactive Compensation Elements / Equipments for Reactive Power Management and Voltage Control of Transmission Grid under Smart Transmission Network and Asset Management System (Part-A2) in Rajasthan Power System. (154) Scheme examined in 30th sub group meeting held on The schme was examined on Inputs sought by sub group awaited. Recommendation of SCPSD and other certain inputs sought.inputs awaited. 6 Punjab PSTCL 29-May-17 Provision of Bus Reactors at 400kV Grid Substations of PSTCL. (158) Scheme Examined by the Techno Economic Subgroup in its 33rd Meeting held on Recommendation of SCPSD and other certain inputs sought.inputs awaited.

61 Annexure-6 POWERGRID S/S COMMISIONED OR TO BE COMMISIONED IN 6 MONTHS BUT DOWNSTEAM NOT AVAILABLE Sr. No Name of Substation ICT detail 220 kv bays which are already commissioned. Year of commissioning of ICT 1 Kurukshetra 02 No ICTs (500 MVA Each) 08 No Line bays DEC New Wanpoh 02 No ICTs (315 MVA Each) + 01x 105 MVA Spare 06 No Line bays July Jalandhar 01 No ICT (500 MVA) 02 Line bays July Amritsar 01 No ICT (315 MVA) 01 No Line bay OCT Jind 02 No ICT(315 MVA) 4 No Line Bays Dec Sohawal 02 No ICT(315 MVA) 02/04 No Line bays June Sahjanhapur 02 No ICT(500 MVA) 01/02 No Line bays Aug Kala Amb 2x3x105 MVA 06 No Line bays To be commissioned(oct-2017) 9 Hamirpur 3x105 MVA ICT 02 Line Bays To be commissioned(nov-2017) 10 Banala 02 No ICTs (315 MVA Each) + 01 x105 MVA Spare 02 Line Bays To be commissioned(oct-2017) 11 Bhiwani 02 No ICT(315 MVA) 8 bays Commissioned in Dec 2015

62 Reactors approved in the 39 th Standing Committee held on 29 th & 30 th May 2017 Annexure-9 S.No. Bus Name State Reactors Proposed(MVAr) 220kV 1 Jind(PG) Haryana 25 2 Fatehabad(PG) Haryana 25 3 Kishenpur(PG) J&K 25 4 Jalandhar(PG) Punjab 2X25 5 Nakodar Punjab 25 6 Amritsar(PG) Punjab 25 7 Dhuri Punjab 25 8 Akal Rajasthan 25 9 Suratgarh Rajasthan 2X25 10 Bikaner Rajasthan 2X25 11 Barmer Rajasthan Narela Delhi R.K.Puram-I Delhi Patparganj 2 Delhi 2X25 15 Maharanibagh(PG) Delhi 2X25 16 Bamnoli Delhi Sabji Mandi Delhi 2X25 18 Gopalpur Delhi 2X25 19 Indraprastha Delhi 2X25 20 Geeta Colony Delhi 2X25 21 Harsh Vihar Delhi 2X25 22 Wazirabad Delhi 2X25 23 Electric Lane Delhi 2X25 24 Mandola Delhi AIIMS Delhi 2X25 26 Sarita Vihar Delhi Bawana Delhi Preet Vihar Delhi Mundka Delhi Masjid Moth Delhi kV 1 Maharanibagh(PG) Delhi Mundka Delhi Mandola(PG) Delhi Hissar(PG) Haryana Kala Amb(TBCB) Himanchal Chamera Pooling Stn.(PG) Himanchal Kishenpur(PG) J&K Nakodar Punjab Jullandhar(PG) Punjab Moga(PG) Punjab Dhuri Punjab Patiala(PG) Punjab Jodhpur Rajasthan Sikar(PG) Rajasthan Allahabad(PG) U.P Meerut(PG) U.P Kashipur Uttarakhand Srinagar Uttarakhand 80

63

64 HVDC Vindhyachal Blocks Outage in last 3 months on DC Overcurrent Date & Time of Date & Time of Outage S.No. Element Tripping Reason Restoration Duration 1 Vindhyachal Block-I 6/16/201715:37 DC over current protection operated 6/16/ :39 1:02:00 2 Vindhyachal Block-II 6/16/201715:37 DC over current protection operated 6/16/201719:39 4:02:00 3 Vindhyachal Block-I 6/20/201714:19 DC over current protection operated 6/20/201715:46 1:27:00 4 Vindhyachal Block-I 6/28/ :59 DC over current protection operated(400 kv VSTPS- ESSAR(MP)-I tripped on Y-N fault) 6/28/201717:57 0:58:00 5 Vindhyachal Block-I 7/22/201720:17 DC over current protection operated( 765 kv Gwalior (PG)- Jaipur (Phagi)-II tripped at same time on Y-B fault) 7/23/2017 6:53 10:36:00 6 Vindhyachal Block-I 8/26/201712:18 7 Vindhyachal Block-I 8/28/20173:17 8 Vindhyachal Block-I 8/28/20177:50 DC over current protection operated(400 kv VSTPS- ESSAR(MP)-I tripped on R-N fault) DC over cu rrent protection operated DC over current protection operated 8/26/201719:06 6:48:00 8/28/20174:55 1:38:00 8/29/20174:22 20:32:00

65 Energy Requirement of Chandigarh April May June July Aug. Sept. Oct. Nov. Dec. Jan. Feb. March % Growth State Energy Requirement of Delhi April May June July Aug. Sept. Oct. Nov. Dec. Jan. Feb. March % Growth State Energy Requirement of Haryana April May June July Aug. Sept. Oct. Nov. Dec. Jan. Feb. March % Growth State Energy Requirement of Himachal Pradesh April May June July Aug. Sept. Oct. Nov. Dec. Jan. Feb. March % Growth State Energy Requirement of Jammu & Kashmir April May June July Aug. Sept. Oct. Nov. Dec. Jan. Feb. March % Growth State

66 Energy Requirement of Punjab April May June July Aug. Sept. Oct. Nov. Dec. Jan. Feb. March % Growth State Energy Requirement of Rajasthan April May June July Aug. Sept. Oct. Nov. Dec. Jan. Feb. March % Growth State Energy Requirement of Uttar Pradesh April May June July Aug. Sept. Oct. Nov. Dec. Jan. Feb. March % Growth State Energy Requirement of Uttarakhand April May June July Aug. Sept. Oct. Nov. Dec. Jan. Feb. March % Growth State Energy Requirement of Northern Region April May June July Aug. Sept. Oct. Nov. Dec. Jan. Feb. March % Growth State

67 Annexure-26 Rampur Karcham Wangtoo

68 Tehri Nathpa Jhakri

69 Tanakpur Sewa-II

70 S.NO. Element Name No. of forced outages Utility Outage Date Outage Time Reason/Remarks Annexure-32 2-Sep-17 2:23 Due to malfunction of master relay at Champa end. 5-Sep-17 10:01 Communication failure at Kurukshetra end 5-Sep-17 20:16 DC line fault. Dist. 151km (from Kurukshetra end). 1 HVDC Champa(WR) - Kurukshetra(NR) line-1 8 POWERGRID 2 HVDC Champa(WR) - Kurukshetra(NR) line-2 6 POWERGRID 3 HVDC 800kV Agra - Biswanath Cherialli line-1 5 POWERGRID 4 400kV Aligarh(UP)-Muradnagar(UP) 4 UP 9-Sep-17 19:15 13-Sep-17 11:47 Fire in cooling cabinet of Y-D (R-ph) Transformer (at Kurukshetra). Due to maloperation of VESDA operation in YY-Y phase in VH-1 14-Sep-17 15:29 CLD operation of DMR1 at Kurukshetra 17-Sep-17 14:34 DMR Fault 27-Sep-17 14:37 External Block. 14-Sep-17 10:14 To inspect neutral Bus switch at Kurukshetra 14-Sep-17 15:19 Differential prot operated at Kurukshetra. 17-Sep-17 14:34 DMR Fault 25-Sep-17 15:14 SMOKE ALARM IN VALVE HALL AT KURUKSHETRA 26-Sep-17 15:34 External block from Kurukshetra end. 27-Sep-17 14:29 External Block. 13-Sep-17 16:56 Tripped due to earth fault. 15-Sep-17 13:02 DC Line fault 17-Sep-17 17:13 Transient fault 17-Sep-17 22:01 Tripped on transient fault 19-Sep-17 14:24 DC line fault. 15-Sep-17 12:11 Y-N fault. From PMU, no auto-reclosing observed. 21-Sep-17 5:32 R-N fault. From PMU, no fault observed. 26-Sep-17 12:11 R-N fault. From PMU, no fault observed. 30-Sep-17 13:47 R-N fault. From PMU, successful auto-reclosing observed kV Bikaner(RVPNL)-Merta(RVPNL) 4 Rajasthan 12-Sep-17 11:40 21-Sep-17 20:40 22-Sep-17 6:44 28-Sep-17 23:08 Bus Bar protection of Bus-1 operated at Bikaner due to problem in IPS tube between CT and CB. From PMU, R-N fault observed. DT received at Merta end. B-N fault observed with delayed clearance of fault. DT received at Bikaner end. From PMU, no fault observed. DT received at Bikaner end. From PMU, no fault observed.

71 6 HVDC 500kV Balia-Bhiwadi line-2 4 POWERGRID 16-Sep-17 5:41 Distance protection operated. Transient fault, km from Balia. 17-Sep-17 5:12 Transient fault at kms from Balia. 18-Sep-17 14:20 DC over-volatge protection operated at Balia end. 20-Sep-17 13:23 Transient fault kV Agra(PG)-Fatehpur(PG) ckt-2 3 POWERGRID 8 Banda(UP), 400/220kV 315 MVA ICT 1 3 UP 10-Sep-17 13:39 11-Sep-17 12:23 16-Sep-17 6:52 3-Sep-17 10:00 Continuous Auto-reclosure of line reported due to Y-N fault at 200km from Agra end. From PMU, no fault observed. Y-N fault, Km from Agra end. From PMU, successful auto-reclosing observed. Distance protection operated. From PMU, no fault observed. UP informed, ICT-I tripped from HV side during opening of Banda-Rewa Road line-i on High Voltage. From PMU, no fault observed. 22-Sep-17 1:31 REF protection operated. From PMU, Y-N fault observed kV Bareilly(PG)-Kashipur(PTCUL) ckt-1 3 POWERGRID/Uttarakhand 27-Sep-17 18:17 16-Sep-17 12:37 20-Sep-17 12:44 20-Sep-17 13:32 Faulty operation at Banda substation. From PMU, no fault observed. Phase to earth fault. R-N, Km from Bareilly. From PMU, Unsuccessful auto-reclosing observed. R-N Fault. 26kms from Bareilly. From PMU, Unsuccessful auto-reclosing observed. Phase to earth fault. R-N Fault. 55kms from Bareilly. From PMU, Unsuccessful auto-reclosing observed. 1-Sep-17 13:39 Over voltage. From PMU, no fault observed kV Bhadla(RVPNL)-Bikaner(RVPNL) ckt-1 3 Rajasthan 12-Sep-17 11:40 Bus Bar protection of Bus-1 operated at Bikaner due to problem in IPS tube between CT and CB. From PMU, R-N fault observed. 23-Sep-17 7:01 From PMU, no fault observed.

72 S. No. Region 1 NR 2 NR 3 NR 4 NR 5 NR 6 NR Name of Elements (Tripped/Manually opened) 1.400kV Ballabgarh-Maharanibagh 2.400/220kV 500 MVA ICT 2 at Maharanibagh 3.400/220kV 500 MVA ICT 3 at Maharanibagh 4.400kV Maharanibagh 400 kv Bus /220kV 315 MVA ICT 2 at Gurgaon(PG) /220kV 500 MVA ICT 3 at Gurgaon(PG) /220kV 315 MVA ICT 1 at Gurgaon(PG) kv Bus 2 at Gurgaon(PG) 1.400kV Anpara-Obra 2.400kV Obra-Sultanpur 3.400/220kV Obra 240 MVA ICT MW Obra Unit 11 & kV Obra 400 kv Bus kV Muzaffarnagar-Vishnuprayag kV Alaknanda HEP(UP)-Srinagar(UTT) kV Alaknanda HEP - Vishnuprayag kV Alaknanda HEP(UP)-Srinagar(UTT) kV Alaknanda HEP - Muzaffarnagar /220kV 500 MVA ICT 2 at Bamnauli kv Badarpur(NTPC)-Mahrauli(DTL) kv Badarpur(NTPC)-Mahrauli(DTL) kV Bikaner-Didwana kV Bhadla(RVPNL)-Bikaner(RVPNL) kV Bikaner-Merta 4.400kV Bikaner-Suratgarh 5.400kV Bhadla(RVPNL)-Bikaner(RVPNL) 2 Owner / Agency POWERGRID POWERGRID UPPTCL Outage Duratio Date Time Date Time Time : : : :55 2:36 UPPTCL/UPRVU NL AHPCL/ 12:50 14:01 1: Jaypee VPHEP/ PTCUL DTL/ NTPC RRVPNL Outage Revival Major Grid Events for Sep, 2017_Northern Region Event (As reported) Bus bar protection operated on 400kV Bus-1 leads to tripping of 400kV Ballabgarh-Maharanibagh ckt, 400/220kV 500MVA ICT 2 and 500MVA ICT 3 at Maharanibagh end. GI2 within 24hrs after 24hrs Y(Powerg rid) Not Received within 24hrs after 24hrs Y(Powergri d) Not Not Received Received Received From PMU, Max dip observed in R phase, fault clearing time 80msec. 400kV Bus-1 at Gurgaon (PG) was already under outage. Busbar protection of 400kV Bus 2 operated due to maloperation of Earth Switch 89AE of 220kV side bay of Y(Powerg Y(Powergri Y(Powerg 17:56 0:43 400/220kV 500MVA ICT-3 at Gurgaon (PG). It leads to tripping GD rid) d) rid) 80msec of 315MVA ICT1,2 & 500MVA ICT3. From PMU, Max dip observed in B-phase followed by Y phase, fault clearing time 80msec. Local Breaker Backup (LBB) protection operated for 200MWUnit #11 Sf6 breaker at 18:49hrs leads to tripping of 400kV Obra-Sultanpur, 400kV Obra-Rewa Road, 400/220kV 20:18 1:28 240MVA ICT 1, 200MW Unit 9&11 OBRA TPS connected on 400kV Bus-1 at Obra TPS. GD1 Y(UP) Y(UP) Y(UP) 720msec From PMU, No fault observed. Disturbance clearing time observed as 720msec B Phase to earth fault occurred on 400kV Alakananda- Muzaffarnagar line. Available evacuation path for Vishnuprayag complex was 400kV Alakananda-Vishnuprayag- Muzaffarnagar. Sustained for few sec and finally all lines tripped on over voltage. From PMU, Max dip observed in B phase, oscillations Bottom phase conductor snapped at tower loc 19 of 220kV Mehrauli-Badarpur lines leads to tripping of 220kV Badarpur(NTPC)-Mehrauli(DTL) ckt 1&2 along with 500MVA ICT-1 of Bamnauli :45 14:20 1: From PMU, two dips observed, at 12:45:16hrs seems ICT tripped.fault clearance 640ms at 12:45:25hrs znother fault observed in R phase. Fault clearance 80ms Fault on IPS tube, in between CT and CB of 400kV Bikaner- Bhadla ckt-1 leads to operation of Bus bar protection at 400kV Bikaner station 11: :07 1:27 From PMU, Max dip observed in R phase, total fault clearing time approx 500msec. 400kV Chabra TPS- Kawai Adani Line tripped on Z-1, R phase to earth fault. During the tripping L3 pole of its main CB stuck and operated LBB. Category as per CEA Grid Standard s GD1 Y(AHPCL) Y(VPHEP) Y(UP) Y(AHPCL) Y(UP) Y(Powerg rid) Y(AHPCL) Y(UP) 80msec 80msec GD Y Y Y 640msec GD1 Energy Unserved (in MU) Preliminary Report DR/EL Detailed Report Y(Rajasth an) Y (Rajasthan ) Y(Rajasth an) Annexure-34 Fault Clearance time 500msec 7 NR kV Chabra-Hindaun ckt kV Chabra-Kawai (Adani) ckt MW Unit #4 at Chabra TPS RRVPNL/ RRVUNL : :43 2:21 400kV Chabra-Hindaun 2, 400kV Chabra- Kawai lines along with Unit #4 tripped on LBB protection operation of 400kV Bus-2 at Chhabra TPS. GD1 Y(Rajast han) Y(Rajastha n) Y(Rajasth an) 350msec 8 NR 1.400/220kV Bareilly 315 MVA ICT kv Bareilly(UP)-Cbganj(UP) kv Bareilly(UP)-Pantnaggar(UTT) kv Bareilly(UP)-Pithorgarh(PG) UPPTCL/ POWERGRID : :28 0:55 From PMU, dip observed in R phase, total fault clearing time approx 350msec. Relay mal operated at 400/220kV Bareily station. 220kV Bareily-Pantnagar, 220kV Bareily-CB Ganj, 220kV Bareily- Pithogarh lines along with 400/220kV 315MVA ICT-1 at Bareilly (UP) tripped. GI2 Y Y Y No fault

73 S. No. Region 9 NR Name of Elements (Tripped/Manually opened) kv HVDC Balia-Bhiwadi Pole kv HVDC Balia-Bhiwadi Pole 2 Owner / Agency POWERGRID Outage Outage Duratio Date Time Date Time Time : Revival 5:36 0:24 Major Grid Events for Sep, 2017_Northern Region Event (As reported) Transient earth fault occurred on HVDC Balia Bhiwadi line at kms from Balia. Earth electrode station was out of service Category as per CEA Grid Standard s Energy Unserved (in MU) within 24hrs Preliminary Report DR/EL Detailed Report after 24hrs Not Received within 24hrs after 24hrs Not Not Received Received Received Fault Clearance time GI2 Y Y Y 80msec 10 NR 1.400kV Balia-Sohawal kV Balia-Sohawal kV Balia(PG)-Mau(UP) kV Balia(PG)-Mau(UP) kV Balia-Patna kV Balia-Patna kV Balia-Patna kV Balia-Patna kV Balia-Biharsharif kV Balia-Biharsharif 2 POWERGRID/ UPPTCL : :01 7:49 At 10:12hrs DC source 1 & 2 of 400kV Balia (PG) station became dead due to fire, all 400kV Lines emanating from Balia opened manually from remote end as protection supply became dead at 400kV Balia (PG) end. GI2 Y Y Y No fault 11 NR kv Jammu(JK)-Samba(PG) kv Salal(NHPC)-Jammu(JK) kv Salal(NHPC)-Jammu(JK) 1 POWERGRID/ NHPC/ J&K : :32 0:19 220kV Jammu(JK)-Samba(PG), 220kV Salal-Jammu ckt 1&2 lines tripped on Earth fault From PMU,Max dip observed in R phase, A/R observed. GD Y Y Y 100ms 12 NR kv HVDC Champa(WR) - Kurukshetra(NR) line kv HVDC Champa(WR) - Kurukshetra(NR) line -2 POWERGRID : :12 0:38 Nuetral differential protection operated at Champa end. Leads to blocking of 800kV HVDC Chmap -Kurukshetra pole 1 & 2. From PMU, a transient dip observed in all three phases. It seems line tripped from Champa end. GI2 Y(POWE RGRID) Y(POWE RGRID) Y 120ms 13 NR /220 kv 315 MVA ICT-1& 2 Lalitpur TPS kv Lalitpur TPS-Lalitpur ckt-2 LPGCL-Bajaj : :53 0:44 LPGCL 220 kv Circuit 1 tripped on Zone 2 R ph fault, subsequently both ICTs(1&2) tripped on outzone earth fault. From PMU, Max dip observed in R phase, and fault clearing time approx 200msec, pattern seems ICT also tripped. GI2 Y Y Y 240msec 14 NR kv HVDC Balia-Bhiwadi Pole kv HVDC Balia-Bhiwadi Pole kV Bhiwadi(PG)-Bhiwadi(RVPNL) 1 & 2 POWERGRID/ RRVPNL : :41 4:21 Non operation of protection in 220kV Bhiwadi station (RVNL) of the lines 220kV Bhiwadi(PG)-Bhiwadi(RVPNL) 1 & 2 leads to dip in AC bus Voltage in Bhiwadi(PG) end and caused tripping of HVDC Balia-Bhiwadi Pole 1 & 2 on DC over Voltage. From PMU, transient dip observed approx 360msec. GI2 Y(Rajasth an) Y Y(Rajasth an) 360msec 15 NR kv Anpara C-Unnao /400kV 1000MVA ICT-3 at Unnao UPPTCL : :13 1:51 B phase to earth fault occurred on 765kV Anpara C-Unnao line, simultaneously ICT III of Unnao triped on Over flux protection From PMU, Max dip observed in B phase at 02:21:44.120hrs, complete fault cleared after 500msec(i.e tripping of ICT) GI2 Y(UP) Y(UP) Y(UP) 500msec 16 NR kV Lucknow-Unnao kV Lucknow(PG)-Lucknow(UP) kV Lucknow(UP)-Singrauli(NTPC) /220kV Lucknow(UP) 315 MVA ICT 1 & 2 UPPTCL/ POWERGRID/ NTPC : :41 1:14 At 17:27hrs fault occurred on 220kV side of Lucknow(UP), and the fault was not cleared by any breaker of 220kv side of Lucknow station. leads to operation of LBB and tripped Lucknow(UP)-Lucknow(PG), 400kV lucknow(up)-unnao, and400/220kv ICT-2 at Lucnow (UP). At 17:45hrs 400/220kV ICT-1 at Lucnow (UP), 400kV Lucknow(UP)-Singrauli and 400kV lucknow(up)-bareilly out leads to complete station blackout GD Y(UP) Y(UP) Y(UP) 1720msec From PMU, Max dip observed in B phase, complete fault clearing time approx 1720msec.

74 S. No. Region 17 NR Name of Elements (Tripped/Manually opened) 1.400kV Dhuri(400kV) -Talwandi Sabo /220kV 500 MVA ICT-3 at Dhuri Owner / Agency PSEB Outage Outage Duratio Date Time Date Time Time : Revival 12:29 1:00 Major Grid Events for Sep, 2017_Northern Region Event (As reported) Dhuri(400kV) -Talwandi Sabo 2 and Dhuri 500MVA ICT 3 Tripped on earth fault( tree fall). (Line charged at 18:24hrs). 400/220kV 500MVA ICT-2 was already under since 19th Aug Category as per CEA Grid Standard s Energy Unserved (in MU) within 24hrs Preliminary Report DR/EL Detailed Report after 24hrs Not Received within 24hrs after 24hrs Not Not Received Received Received Fault Clearance time GD Y Y Y 80msec 18 NR UPPTCL kV Banda (UP) Bus 1& /220kV 315 MVA ICT-1 at Banda (UP) kV Rewa Road(UP) - Banda(UP) ckt From PMU, Two transients observed; Max dip in B phase. Wrong Switching operation at 400kV Banda station leads to : :00 3:45 tripping of elements (400kV Banda-Rewa Road D/C; 315MVA ICT 1) connected to 400kV Bus 1& 2 GI2 Y Y Y No fault

75 List of Tripping of Inter Regional Lines for the month of Sep 2017_Northern Region Annexure-35 S. No. Name of Transmission Element Tripped Owner/ Utility Outage Restoration Category as Load Loss/ Brief Reason per CEA Grid Gen. Loss (As reported) standards Date Time Date Time # Fault Clearance Time (>100 ms for 400 kv and 160 ms for 220 kv) *FIR Furnished (YES/NO) DR/EL provided in 24 hrs (YES/NO) Other Protection Issues and Non Compliance (From PMU, seems ) Remedial Action Remarks kv Auraiya(NTPC)-Malanpur(PG) NTPC : kv Auraiya(NTPC)-Malanpur(PG) tripped on earth fault :08 NO No Auto Reclosure function not operated kv Agra-Gwalior -2 POWERGRID : kv Agra-Gwalior -2 tripped DT received at Agra (PG) end :19 NO No Maloperation NO fault observed from PMU data kv Auraiya(NTPC)-Malanpur(PG) NTPC : kv Auraiya(NTPC)-Malanpur(PG) tripped on Phase to earth fault. B-N fault :30 NO No Auto Reclosure function not operated kv HVDC Champa(WR) - Kurukshetra(NR) line -1 POWERGRID : kv HVDC Champa(WR) - Kurukshetra(NR) line -1 tripped due to malfunction of master relay at Champa end :59 NO No Malfunction kv HVDC Champa(WR) - Kurukshetra(NR) line -1 POWERGRID : kv HVDC Champa(WR) - Kurukshetra(NR) line -1 tripped due to commutation failure at Kurukshetra end :13 Yes NO Malfunction Number of restart attempt on Communication failure to be shared with NRLDC kv HVDC Champa(WR) - Kurukshetra(NR) line -1 POWERGRID : kv HVDC Champa(WR) - Kurukshetra(NR) line -1 tripped DC line fault. Dist. 151km (from Kurukshetra end) :10 NO No No restart attept observed from PMU No of restart attempts on DC earth fault to be shared with NRLDC kv HVDC Champa(WR) - Kurukshetra(NR) line -1 POWERGRID : kv HVDC Champa(WR) - Kurukshetra(NR) line -1 tripped due to Fire in cooling cabinet of Y-D (R-ph) Transformer (at Kurukshetra) :19 NO No kv HVDC Champa(WR) - Kurukshetra(NR) line -1 POWERGRID : kv HVDC Champa(WR) - Kurukshetra(NR) line -1 tripped due to maloperation of VESDA operation in YY-Y phase in VH :11 NO No Maloperation kv HVDC Vindhyachal HVDC BtB Block 1 POWERGRID : kv HVDC Vindhyachal HVDC BtB Block 1 tripped DC Over Current Protection due to tripping of external line, 400 kv Vindhyachal - Sasan Line at VSPP/ NTPC end :27 NO No Maloperation DC Over current settings may be reviewd by Powergrid kv Auraiya(NTPC)-Malanpur(PG) NTPC : kv Auraiya(NTPC)-Malanpur(PG) tripped on B phase to earth fault :54 Yes Yes Auto Reclosure function not operated kv HVDC Agra - Biswanath Cherialli line -1 POWERGRID : kv HVDC Agra - Biswanath Cherialli line -1 tripped on earth fault :06 NO No No restart attept observed from PMU kv HVDC Mohindergarh-Mundra Pole 2 APL : kv HVDC Mohindergarh-Mundra Pole 2 tripped due to Y phase CB of AC RPC Filter- 34 got stuck and it initiated command for Pole -2 tripping :13 NO No kv HVDC Champa(WR) - Kurukshetra(NR) line -1 POWERGRID : kv HVDC Champa(WR) - Kurukshetra(NR) line -1 tripped on CLD operation of DMR1 at Kurukshetra :58 NO No Time settings of CLD protection may be shared with NRLDC Page 1 of 2

76 List of Tripping of Inter Regional Lines for the month of Sep 2017_Northern Region S. No. Name of Transmission Element Tripped Owner/ Utility Outage Restoration Category as Load Loss/ Brief Reason per CEA Grid Gen. Loss (As reported) standards Date Time Date Time # Fault Clearance Time (>100 ms for 400 kv and 160 ms for 220 kv) *FIR Furnished (YES/NO) DR/EL provided in 24 hrs (YES/NO) Other Protection Issues and Non Compliance (From PMU, seems ) Remedial Action Remarks kv HVDC Agra - Biswanath Cherialli line -1 POWERGRID : kv HVDC Agra - Biswanath Cherialli line -1 tripped on DC Line fault :05 NO No kV Kota-Barod Rajasthan :13 220kV Kota-Barod tripped on R phase to earth fault occurred at Kota end :16 Yes(after 24hrs) Yes(After 24hrs) kv Balia-Patna 1 POWERGRID : kv Balia-Patna 1 tripped due to 220kV DC source-1 & 2 at 400kV Balia became dead due to fire :25 NO No Both DC supply failure Manually opened from remote end due to protection system outage kv Balia-Patna 2 POWERGRID : kv Balia-Patna 2 tripped due to 220kV DC source-1 & 2 at 400kV Balia became dead due to fire :29 NO No Both DC supply failure Manually opened from remote end due to protection system outage kv Balia-Patna 3 POWERGRID : kv Balia-Patna 3 tripped due to 220kV DC source-1 & 2 at 400kV Balia became dead due to fire :31 NO No Both DC supply failure Manually opened from remote end due to protection system outage kv Balia-Patna 4 POWERGRID : kv Balia-Patna 4 tripped due to 220kV DC source-1 & 2 at 400kV Balia became dead due to fire :37 NO No Both DC supply failure Manually opened from remote end due to protection system outage kv Balia-Biharsharif 1 POWERGRID : kv Balia-Biharsharif 1 tripped due to 220kV DC source-1 & 2 at 400kV Balia became dead due to fire :21 NO No Both DC supply failure Manually opened from remote end due to protection system outage kv Balia-Biharsharif 2 POWERGRID : kv Balia-Biharsharif 2 tripped due to 220kV DC source-1 & 2 at 400kV Balia became dead due to fire :04 NO No Both DC supply failure Manually opened from remote end due to protection system outage kv HVDC Champa(WR) - Kurukshetra(NR) line -1 POWERGRID : kv HVDC Champa(WR) - Kurukshetra(NR) line -1 tripped on DMR Fault :12 NO No kv HVDC Agra - Biswanath Cherialli line -1 POWERGRID : kv HVDC Agra - Biswanath Cherialli line -1 tripped on Transient fault :52 NO No kv HVDC Agra - Biswanath Cherialli line -1 POWERGRID : kv HVDC Agra - Biswanath Cherialli line -1 tripped on transient fault :21 NO No kv HVDC Agra - Biswanath Cherialli line -1 POWERGRID : kv HVDC Agra - Biswanath Cherialli line -1 tripped on DC line fault :10 NO No kv HVDC Vindhyachal HVDC BtB Block 2 POWERGRID : kv HVDC Vindhyachal HVDC BtB Block 2 tripped Due to operation of DC Over current Protection of the Active System caused by Problem in NTPC Vindhyachal Switch Yard :31 NO No Reason for Multiple restarts On DC overcurrent to be shared with NRLDC kv Balia-Patna 1 POWERGRID : kv Balia-Patna 1 tripped DT received from Patna end :43 NO No Maloperation No significant dip in the Balia PMU Voltage kv Pusauli (PGCIL) - Sahupuri (UPPTCL) UPPTCL : kv Pusauli (PGCIL) - Sahupuri (UPPTCL) tripped on Phase to earth fault. B-N fault :55 NO No Auto Reclosure function not operated kv HVDC Champa(WR) - Kurukshetra(NR) line -1 POWERGRID :37 # Fault Clearance time has been computed using PMU Data from nearest node available and/or DR provided by respective utilities ( Annexure- II) *Yes, if written Preliminary report furnished by constituent(s) Fault Clearance time(>100ms for 400kV and >160ms for 1 220kV) 2 DR/EL Not provided in 24hrs 3 FIR Not Furnished 4 Protection System Mal/Non Operation 5 A/R not operation 1. CEA Grid Standard-3.e 2. CEA Transmission Planning Criteria 800 kv HVDC Champa(WR) - Kurukshetra(NR) line -1 tripped on External Block. Reporting of Violation of Regulation for various issues for above tripping :05 NO No 1. IEGC 5.2(r) 2. CEA Grid Standard IEGC a 2. CEA Grid Standard 12.2 (Applicable for SLDC, ALDC only) 1. CEA Technical Standard of Electrical Plants and Electric Lines: 43.4.A 2. CEA (Technical Standards for connectivity to the Grid) Regulation, 2007: Schedule Part 1. (6.1, 6.2, 6.3) 1. CEA Technical Standard of Electrical Plants and Electric Lines: 43.4.C 2. CEA Technical Planning Criteria Reason for blocking of Pole on External Block to be shared with NRLDC Page 2 of 2

77 Annexure-5 UFR, df/dt defense scheme in Northern Region Video Conferencing between NRLDC and Punjab-SLDC offices Discussion Points Date: o AVAILABILITY OF DATA: Name of the feeders was properly updated in the SCADA mapping but digital data was not available for most of the main feeders. Name and SCADA data of alternate feeders was not mapped. o REMOTE END DATA POINTS: Punjab SLDC informed that remote end of feeders is at 66 kv. RTU is not installed at most of the 66kV station. o ANALOG AND DIGITAL DATA: The following points were discussed among others: Non-availability of digital data of main feeders. Analog data partially available for main feeders. Some of the feeders showing reverse direction of MW value. Analog (MW value) and digital data of alternate feeder yet to be added. Feeders under UFR stage-4 (48.6Hz) yet to be mapped. Total designed load relief of each stage of UFR and df/dt was less than the stipulated load relief. Punjab SLDC informed the following about RTU telemetry: RTU would be installed at 50% of the 220 & 132kV station till March RTU would be installed at 100% of the 220 & 132kV station till December Installations on 220 & 132kV stations having UFR and df/dt relays would be done on priority No telemetry available at 66kV remote end sub-stations. NRLDC suggested SLDC-Punjab to plan for telemetry of remote end of 66kV stations.

78 o DEFENSE SCHEME RELATED DETAILS: Complete updated list of feeders identified for UFR and df/dt (stage wise information) based load relief along with nature of load (radial/ non radial) to be provided. Details of feeders tripped on UFR, df/dt operation/mis-operation since 01-Jan-2017 to be shared. o RELAY SPECIFIC DETAILS: Source of frequency measurement for UFR, df/dt relay are viz. positive sequence, phase-to-neutral, phase-to-phase. Different timings viz. measurement time, operational time, feeder tripping time etc. A format for above points is attached at Annexure-A. Punjab submitted the details attached as Annexure-B. Further details in desired format needs to be submitted. o LESS ACTUAL RELIEF: Lower actual load relief observed from NRLDC SCADA data. Same needs to be reviewed. SLDC-Punjab informed that they would review individual feeder wise details and verify it in 20days. o NODAL OFFICER: For UFR, df/dt relay related communication with SLDC, two nodal officers to be assigned. The details like contact, needs of the same needs to be shared. o FREQUENCY OF CHECKING: Updation and checking of UFR, df/dt relays is continuous process. In first week of every month SLDC shall verify the planned load relief and compare it with desired load relief and take actions accordingly. SLDC may also submit the quarterly feedback report to NRPC/ NRLDC.

79 UFR, df/dt defense scheme in Northern Region Video Conferencing between NRLDC and Haryana-SLDC offices Discussion Points Date: o AVAILABILITY OF DATA: Name of the feeders was properly updated in the SCADA mapping but digital data was not available for most of the main feeders. Name and SCADA data of alternate feeders was not mapped. o REMOTE END DATA POINTS: Haryana SLDC informed that remote end of feeders is at 66kV. Most of the remote end data is not available o ANALOG AND DIGITAL DATA: The following points were discussed among others: Non-availability of digital data of main feeders. Analog data partially available for main feeders. Some of the feeders showing reverse direction of MW value. Analog (MW value) and digital data of alternate feeder yet to be added. Remote end feeder telemetry to be tabulated. Feeders under df/dt stage-2 & 3 yet to be mapped. UFR Stage nomenclature needs to be modified (Stage-1: 49.2Hz; Stage-2: 49.0Hz, Stage-3: 48.8Hz and Stage-4: 48.6Hz) It was observed that the designed load relief was lower than the stipulated relief in UFR stage-4 (48.6Hz) and df/dt stage-1. SLDC-Haryana representative informed that they would take corrective actions for availability of Analog and digital data in SCADA display of UFR and df/dt. Approved Target date : 30 th Oct 2017 NRLDC suggested SLDC-Haryana to plan for telemetry of remote end of 66kV stations. o DEFENSE SCHEME RELATED DETAILS: Complete updated list of feeders identified for UFR and df/dt (stage wise information) based load relief along with nature of load (radial/ non radial) to be provided.

80 Details of feeders tripped on UFR, df/dt operation/mis-operation since 01-Jan-2017 to be shared. o RELAY SPECIFIC DETAILS: Source of frequency measurement for UFR, df/dt relay are viz. positive sequence, phase-to-neutral, phase-to-phase. Different timings viz. measurement time, operational time, feeder tripping time etc. A format for above points is attached at Annexure-A. o LESS ACTUAL RELIEF: Lower actual load relief observed from NRLDC SCADA data. Same needs to be reviewed. SLDC-Haryana informed that they would review individual feeder wise details and verify it in 20days. o NODAL OFFICER: For UFR, df/dt relay related communication with SLDC, two nodal officers to be assigned. The details like contact, needs of the same needs to be shared. o FREQUENCY OF CHECKING: Updation and checking of UFR, df/dt relays is continuous process. In first week of every month SLDC shall verify the planned load relief and compare it with desired load relief and take actions accordingly. SLDC may also submit the quarterly feedback report to NRPC/ NRLDC.

81 UFR, df/dt defense scheme in Northern Region Video Conferencing between NRLDC and Delhi-SLDC offices Discussion Points Date: o ALTERNATE FEEDER NAME: Source of station load (sum of ICTs etc.) to be mentioned in the Total station load under the head of Alternate feeder name. o REMOTE END DATA POINTS: Delhi SLDC SCADA reported points of feeders to be mapped as remote end MW. The header names viz. station end and remote end to be modified accordingly to indicate source of data (Delhi islanding SCADA points, Delhi SLDC SCADA points etc.) o SUSPECTED DATA: Low percentage of availability of analog/digital data. ICCP mapping of data points to be looked into at SLDC-Delhi/NRLDC. o DEFENSE SCHEME RELATED DETAILS: Complete updated list of feeders identified for UFR and df/dt based load relief along with nature of load (radial/ non radial) to be provided. The above details w.r.t. Delhi islanding scheme may also be provided. Details of feeders tripped on UFR, df/dt operation/mis-operation since 01-Jan-2017 to be shared. o RELAY SPECIFIC DETAILS: Source of frequency measurement for UFR, df/dt relay viz. positive sequence, phase-to-neutral, phase-to-phase. Different timings viz. measurement time, operational time, feeder tripping time etc. A format for above points is attached at Annexure-A. o LESS ACTUAL RELIEF: Lower actual load relief observed from NRLDC SCADA data. Same needs to be reviewed.

82 o REVISED TARGETS: Revised UFR, df/dt targets along with reference of meeting cited in the VC wherein the revised targets to be provided. (Agenda, MoM of the meetings may kindly also be shared) o NODAL OFFICER: For UFR, df/dt relay related communication with SLDC, two nodal officers to be assigned. The details like contact, needs of the same needs to be shared.

83 UFR, df/dt defense scheme in Northern Region Video Conferencing between NRLDC and Uttar Pradesh-SLDC offices Discussion Points Date: o AVAILABILITY OF DATA: Name of the feeders was properly updated in the SCADA mapping but analog data and digital data was not available for most of the main feeders. Name and SCADA data of alternate feeders was also not mapped. o REMOTE END DATA POINTS: Remote end of the feeder covered under UFR and df/dt was also not mapped in SCADA display. UP SLDC informed that remote end of feeders is at 33kV. RTU is not installed at 33kV station. o ANALOG AND DIGITAL DATA: The following points were discussed among others: Non-availability of analog/digital data of main feeders for all the UFR stages. Analog (MW value) and digital data of alternate feeder yet to be added. Remote end feeder telemetry to be tabulated. Planned relief needs to be mentioned in UFR mapping. Total of planned and actual load relief also to be mapped. Total of actual load relief to be mapped in df/dt stages. Low percentage of availability of analog/digital data to be looked into. UP SLDC informed that to obtain adequate relief during actual incident more no. of feeders are designated to provide relief. RLDC suggested for mapping of these feeders also in SCADA display. UP SLDC informed the following about RTU telemetry: 35 stations of 220kV sub-station would be completed by Mar stations of 220kV sub-station would be completed by Dec For remaining 220/132kV or 132/33kV stations, scheme yet to be planned.

84 RLDC suggested SLDC-UP to segregate the 33kV based locations of UFR and df/dt relays in following three stages: 1. Where already RTU installed at 132kV stations, wiring of 33kV feeders to RTU to be done. The work targeted to be completed within three months. 2. Where new 65 RTUs installed at 220kV stations, 33kV and above feeders covered under UFR and df/dt to be wired on priority basis. 3. Where new scheme to be approved for remaining location of 220kV & 132kV stations, expedite the scheme and also cover the remaining 33kV and above feeders at least those covered under UFR, df/dt scheme and SPS. RLDC suggested SLDC-UP to expedite the scheme to cover all the UFR, df/dt and SPS location for visibility to the operators. As per Hon ble CERC order dated 23rd Dec 13 in petition no 221/MP/2012 has ordered as follows: (c) UFRs and df/dt relays also be mapped on the SCADA system of each state so that they can be monitored from SLDC/NRLDC. (d) All STUs and SLDCs to map/network the UFR and df/dt on their SCADA system. o DEFENSE SCHEME RELATED DETAILS: Complete updated list of feeders identified for UFR and df/dt (stage wise information) based load relief along with nature of load (radial/ non radial) to be provided. Details of feeders tripped on UFR, df/dt operation/mis-operation since 01-Jan-2017 to be shared. o RELAY SPECIFIC DETAILS: Source of frequency measurement for UFR, df/dt relay viz. positive sequence, phase-to-neutral, phase-to-phase. Different timings viz. measurement time, operational time, feeder tripping time etc. A format for above points is attached at Annexure-A.

85 o LESS ACTUAL RELIEF: Lower actual load relief observed from NRLDC SCADA data. Same needs to be reviewed. SLDC-UP informed that they would review individual feeder wise details and verify it in 20days. o NODAL OFFICER: For UFR, df/dt relay related communication with SLDC, two nodal officers to be assigned. The details like contact, needs of the same needs to be shared. o FREQUENCY OF CHECKING: Updation and checking of UFR, df/dt relays is continuous process. In first week of every month SLDC shall verify the planned load relief and compare it with desired load relief and take actions

86 UFR, df/dt defense scheme in Northern Region Video Conferencing between NRLDC and HP (Himachal Pradesh)- SLDC offices Discussion Points Date: o AVAILABILITY OF DATA: Name of the feeders and alternate feeders was properly updated in the SCADA mapping of UFR relays but analog data and digital data was not available for most of the main feeders of UFR relays. Alternate feeders/ ICTs details shall also be updated in SCADA mapping of df/dt relays. Designated load relief for df/dt stage-2 was lower than the stipulated relief. o REMOTE END DATA POINTS: HP SLDC informed that remote end of feeders is at 33kV. RTU is not installed at 33kV station. o ANALOG AND DIGITAL DATA: The following points were discussed among others: Non-availability of analog/digital data of main feeders of UFR relays. Some of the feeders showing reverse direction of MW value. Total actual load relief of each stage of df/dt was very less. Summation of MW value of alternate feeder was not ok. HP SLDC informed the following about RTU telemetry: No telemetry available at 33kV sub-stations except Open Access consumer. New scheme for installation of RTU in 37 locations of 66kV has been submitted under PSDF scheme. New scheme for installation of RTU to cover the remaining 33kV feeders including remote end of feeders at least those covered under UFR, df/dt scheme and SPS to be planned. RLDC suggested SLDC-HP to segregate the 33kV based locations of UFR and df/dt relays in following two stages:

87 4. Where already RTU installed at 132kV stations, wiring of 33kV feeders to RTU to be done. The work targeted to be completed within three months. 5. Where new scheme to be approved for remaining location of 33kV stations at least those covered under UFR, df/dt scheme and SPS. o DEFENSE SCHEME RELATED DETAILS: Complete updated list of feeders identified for UFR and df/dt (stage wise information) based load relief along with nature of load (radial/ non radial) to be provided. Details of feeders tripped on UFR, df/dt operation/mis-operation since 01-Jan-2017 to be shared. o RELAY SPECIFIC DETAILS: Source of frequency measurement for UFR, df/dt relay are viz. positive sequence, phase-to-neutral, phase-to-phase. Different timings viz. measurement time, operational time, feeder tripping time etc. A format for above points is attached at Annexure-A. o LESS ACTUAL RELIEF: Lower actual load relief observed from NRLDC SCADA data. Same needs to be reviewed. SLDC-HP informed that they would review individual feeder wise details and verify it in 20days. o NODAL OFFICER: For UFR, df/dt relay related communication with SLDC, two nodal officers to be assigned. The details like contact, needs of the same needs to be shared. o FREQUENCY OF CHECKING: Updation and checking of UFR, df/dt relays is continuous process. In first week of every month SLDC shall verify the planned load relief and compare it with desired load relief and take actions accordingly. SLDC may also submit the quarterly feedback report to RPC/ RLDC.

88 UFR, df/dt defense scheme in Northern Region Video Conferencing between NRLDC and Rajasthan-SLDC offices Discussion Points Date: o AVAILABILITY OF DATA: Name of the feeders and alternate feeders was properly updated in the SCADA mapping but analog data and digital data was not available for most of the main feeders. o REMOTE END DATA POINTS: Rajasthan SLDC informed that remote end of feeders is at 33kV. RTU is not installed at 33kV station. o ANALOG AND DIGITAL DATA: The following points were discussed among others: Non-availability of analog/digital data of main feeders. Some of the feeders showing reverse direction of MW value. Total actual load relief of each stage of df/dt was very less. Summation of MW value of alternate feeder also less than target load relief mentioned in the table. Some of the feeders were showing zero MW in planned relief. It was observed that the designed load relief was higher than the stipulated relief. Rajasthan SLDC informed that to obtain adequate relief during actual incident more no. of feeders are designated to provide relief and the same are also mapped in SCADA. Rajasthan SLDC informed the following about RTU telemetry: Available in 90% of 220/132kV sub-station. Available for few 132/33kV sub-stations. No telemetry available at 33kV sub-stations. New RTU installation work has been awarded for 68 important 132kV stations. Target completion date is Mar New scheme for installation of RTU in location of 132kV stations is under planning stage. RLDC suggested SLDC-Rajasthan to segregate the 33kV based locations of UFR and df/dt relays in following three stages:

89 6. Where already RTU installed at 132kV stations, wiring of 33kV feeders to RTU to be done. The work targeted to be completed within three months. 7. Where new 68 RTUs installed at 132kV stations, 33kV feeders covered under UFR and df/dt to be wired on priority basis. 8. Where new scheme to be approved for location of 132kV stations, expedite the scheme and also cover the remaining 33kV feeders at least those covered under UFR, df/dt scheme and SPS. o DEFENSE SCHEME RELATED DETAILS: Complete updated list of feeders identified for UFR and df/dt (stage wise information) based load relief along with nature of load (radial/ non radial) to be provided. Details of feeders tripped on UFR, df/dt operation/mis-operation since 01-Jan-2017 to be shared. o RELAY SPECIFIC DETAILS: Source of frequency measurement for UFR, df/dt relay are viz. positive sequence, phase-to-neutral, phase-to-phase. Different timings viz. measurement time, operational time, feeder tripping time etc. A format for above points is attached at Annexure-A. Rajasthan submitted the details attached as Annexure-B. Further details in desired format needs to be submitted. o LESS ACTUAL RELIEF: Lower actual load relief observed from NRLDC SCADA data. Same needs to be reviewed. SLDC-Rajasthan informed that they would review individual feeder wise details and verify it in 20days. o NODAL OFFICER: For UFR, df/dt relay related communication with SLDC, two nodal officers to be assigned. The details like contact, needs of the same needs to be shared. o FREQUENCY OF CHECKING: Updation and checking of UFR, df/dt relays is continuous process. In first week of every month SLDC shall verify the planned load relief and compare it with desired load relief and take actions

90 accordingly. SLDC may also submit the quarterly feedback report to RPC/ RLDC.

91 S.No Format of UFR, df/dt relay specific information to be furnished by constituents Substation name/ Voltage level (in kv) Feeder Name (along with voltage level) Relay Make & Model Stage Relay Calculation time Delay Relay Operational time ( Relay calculation time + Delay) e.g. 220kV Naraina 33kV Khyber lane-1.. UFR: 49.2Hz 100ms (say) 50ms (say) 150ms (say) Definition of few terms w.r.t above format: Condition: For UFR, the condition for operation of relay is frequency going less than the threshold value of , 48.8 or 48.6 Hz based on respective stage. Similarly for df/dt relay, condition is frequency going less than the threshold value of 49.9Hz and Rate of fall of frequency (df/dt) going beyond 0.1Hz, 0.2Hz or 0.3Hz as per different stages. Calculation Time: Time taken by relay to calculate the condition. After elapsing of this time a decision on tripping or non-tripping based on condition being met, would be taken. Different algorithms could be there for calculation. The following are few of the examples: Calculating the condition based on a number of samples. Condition needs to be met for all the samples for a pre-defined samples (Say, 10 samples). In such a scenario, o Calculation time = Time taken for one sample x No. of pre-defined samples Calculating the condition based on large sample time. Other algorithms. For instance in MicoM P92x152 relay the following is the calculation algorithm for df/dt: o df/dt cycles.nb = 3 (can be set/changed) o df/dt Validat.nb = 2 (can be set/changed) o df/dt cycles.nb: Number of instantaneous df/dt measurements viz. df/dt1, df/dt2 and df/dt3. Average of these values are calculated and compared with the threshold value. df/dt Avg = (df/dt1 + df/dt2 + df/dt3) / 3. o df/dt Validat.nb: Number of Average values to be calculated and compared with the threshold value viz. df/dt Avg1, df/dt Avg2. o For relay to operate, both the average values viz. df/dt Avg1 and df/dt Avg2 needs to be more than the threshold value. Delay: Any delay in operation of relay. This delay is not affecting the decision of the relay. It is only delaying the decision. Relay Operational time: The summation of Calculation Time + Delay.

92 Gmail - Fwd: Mapping of UFR and df/dt - Punjab 1 of 1 9/19/2017, 6:15 PM Nitin Yadav <yadavnitin06@gmail.com> Fwd: Mapping of UFR and df/dt - Punjab Rajiv Porwal <rajivporwal@gmail.com> Tue, Sep 19, 2017 at 6:01 PM To: Nitin Yadav <yadavnitin.06@gmail.com>, ANKIT GUPTA <ankitinfo6@gmail.com>, Naresh Ram <naresh.ram256@gmail.com> Cc: ashok rajan <rajanashok.fbd@gmail.com>, Jayantika Singh <jayantika.law@gmail.com>, Kavita Parihar <kavita.posoco@gmail.com>, Suruchi Jain <surujain03@gmail.com>, riza naqvi <riza.naqvi@gmail.com>, Gaurav Malviya <malviya.gaurav85@gmail.com> Pl update our data base and also keep for APTEL cases (file). rgds Rajiv Porwal Forwarded message From: Deputy Director PC <ddpc_pseb@rediffmail.com> Date: Tue, Sep 19, 2017 at 4:27 PM Subject: Mapping of UFR and df/dt - Punjab To: SEONRPC <seo-nrpc@nic.in>, NRLDC SO-II <nrldcso2@gmail.com>, Rajiv Porwal <rajivporwal@gmail.com>, daman jain <dkj2009@yahoo.co.in> Cc: soniagvij456 <soniag.vij456@gmail.com> Sir, Please find the attached information in compliance to 139th OCC Agenda Item no Mapping of UFR and DF/DT: 1. Source of frequency measurement for DF/DT and UFR relays is phase-to-neutral positive sequence and three phase PT voltage from 220KV PT's. 2. Computational time for measurement of rate of change of frequency in DF/DT relays is 8 to 10 cycles and in case of UFR relays, it is 4 to 5 cycles. This is for your information and further necessary action please. Regards O/o S.E./SLDC (Op) PSTCL, PATIALA

93 RAJASTHAN RAJYA VIDYUT PRASARAN NIGAM I.IMITED ( An tso 9001:2008 Certified Cor;;;;t corporote f.g.:$ly.]r rmbe(ct N): rao I oe'rlzorioscco OFFICE OF THE I CIII 648s ENGINEER lrrncr_rn, PROTECTIOTI,'*TTruO CHAMBAI GSS & SAFETY) PREMISES, HAWA SARAK, CIVII. LINES, JAIPUR - Emoif 3O2OI9 : ce.mps@rvpn.co.in phone : ng'{ Fqx No. g ss No.RVPN/AC E/MpT&S/Tech. /F. The Superintending Engineer (SOLD), RVPN, Jqiour Sub:- Mopping of UFR ond dfldt (135* occ meeiing-agendo Point No.21) Ref :_ your office Letier No. RVpN/SE(SOLD)/XEN_t D.9 0i dt. 3t.s.t )/F.OCC/ z On the qbove cited subject the desired informotion is os follows. l. Source of frequency meosurement for UFR,d f /dt reloys neutrol ore phose ond phose to phose. to 2' computotionol time for meosuremeni of frequency milliseconds for ufr ond is for 120 dfldi l60 milliseconds. tp<rttr (A.K.Gupibl ' Addl.Chief Engineer (MpT&S) RVpNL, Joiour copy forworded to the superintendingengineer (MpT&s), t <xr/r reference RV'N,,. v r r\' Joipur Jqlpl with to your moir messoge dt P-r"\', Addl.Chief Engineer lmntasl RVPNL, Joipur lt.16/lck/547

94 Video Conferencing NRLDC <<>> differnet SLDC UFR and df/dt Mapping

95 One to One VC Schedule for UFR, df/dt mapping S. No. SLDC Date Time Status 1 Punjab :00Hrs Done 2 Haryana :00Hrs Done 3 Delhi :00Hrs Done 4 Uttar Pradesh :00Hrs Done 5 Rajasthan :00Hrs 6 Uttarakhand :00Hrs at 11:00hrs 7 Himachal Pradesh :00Hrs Done 8 J&K :00Hrs 9 Chandigarh :00Hrs Mail sent, VC link not working

96 STATES UFR and df/dt target as per NRPC 1 2 Load relief in MW Peak MW Met Hz Hz 48.8 Hz 48.6 Hz TOTAL Punjab Haryana Rajasthan Delhi UP Uttarakhan d HP J & K Chandigarh TOTAL details STATES 3 4 Load relief in MW Stage-I Stage-II Stage-III 49.9Hz& 0.1Hz/sec 49.9Hz & 0.2Hz/sec 49.9Hz & 0.3Hz/sec Total Punjab Haryana Rajasthan Delhi UP Uttarakhand HP J & K Chandigarh TOTAL

97 Mapping of UFR and df/dt: Points raised during OCC meeting States UFR df/dt As per Format J&K No No No UP Yes Yes Partial Haryana Yes Yes (Only stage-1) Partial Delhi Yes Yes Partial HP Yes Yes Partial Uttarakhand No No No Punjab Yes Yes Partial Rajasthan No Yes Partial Remarks Following not provided: Feeder-wise planned load relief. Complete telemetry of feeders. Alternate feeders. Total planned relief. (Stage wise) Total actual relief. (Stage Wise) Following not provided: Feeder wise planned load relief. Complete telemetry of feeders. Alternate feeders for both UFR and df/dt. UFR Stage nomenclature needs to be modified (Stage-1: 49.2Hz) Total actual relief. Following not provided: Total of actual analog data of MW and alternate feeders. Data suspected for most of the digital and Analog value Following not provided: Complete telemetry of feeders. Complete Alternate feeders. Segregation of stage wise load Following not provided: Complete telemetry of feeders. Alternate feeders. Digital Status of all the feeders Lower actual load relief (As per SCADA data) Following not provided: Analog value and digital data not available Only alternate feeder details provided

98 Video Conferencing NRLDC <<>> Punjab SLDC UFR and df/dt Mapping at 12:00hrs

99 UFR, df/dt displays: PUNJAB Other end feeder telemetry not tabulated. Alternate feeder name/telemetry is missing. Digital CB status is missing. Lower actual load relief (As per SCADA data) BACK

100 UFR, df/dt displays: RAJASTHAN for Sample BACK

101 Action points Complete updated list of feeders identified for UFR and df/dt based load relief along with nature of load (radial/ non radial). Display related issues to be resolved: Less planned relief earmarked. Other end feeder telemetry to be tabulated. Alternate feeder name/telemetry. Digital CB status missing. Feeders not mapped for UFR stage-4 (48.6Hz) Lower actual load relief observed from NRLDC SCADA data.

102 Video Conferencing NRLDC <<>> Haryana SLDC UFR and df/dt Mapping at 12:00hrs

103 UFR, df/dt displays: HARYANA Telemetry not available for few feeders. Other end feeder telemetry is missing. Alternate feeder name/telemetry is missing. Only stg-1 df/dt feeder details are mapped. UFR Stage nomenclature needs to be modified (Stage-1: 49.2Hz) BACK

104 UFR, df/dt displays: RAJASTHAN for Sample BACK

105 Action points Complete updated list of feeders identified for UFR and df/dt based load relief along with nature of load (radial/ non radial), make and model of relay. Display related issues to be resolved: Less planned relief earmarked. Other end feeder telemetry to be tabulated. Alternate feeder name/telemetry. Digital CB status real time data. Feeders not mapped for df/dt stage-2 & 3 UFR Stage nomenclature needs to be modified (Stage-1: 49.2Hz) Total of actual load relief Lower actual load relief observed from NRLDC SCADA data.

106 Video Conferencing NRLDC <<>> Delhi SLDC UFR and df/dt Mapping at 11:00hrs

107 df/dt SCADA display: Delhi

108 UFR SCADA display: Delhi Logic of taking Total station load. Whether summation of ICTs is taken or otherwise. Digital CB status color coding. Three colors could be observed in SCADA display viz. Orange, Green, White. UFR, df/dt Stage wise sum still to be mapped. Low percentage of availability of analog/digital data. Suspected data.

109 Action Points Complete updated list of feeders identified for UFR and df/dt based load relief along with nature of load (radial/ non radial), make and model of relay. Display related issues to be resolved: UFR, df/dt Stage wise sum to be mapped. Low percentage of availability of analog/digital data. Suspected data. Lower actual load relief observed from NRLDC SCADA data.

110 Action Points: Relay specific information In addition to the SCADA mapping, States may provide following information regarding the UFR, df/dt relays installed at their respective substations: Source of frequency measurement for UFR, df/dt relay viz. positive sequence, phase-to-neutral, phase-to-phase. Computational time for measurement of frequency, rate of change of frequency in UFR, df/dt relays respectively. The above has been included as Agenda in 135 th NRPC-OCC meeting

111 Video Conferencing NRLDC <<>> UP SLDC UFR and df/dt Mapping at 15:00hrs

112 UFR, df/dt displays: UP Feeder-wise planned load relief. Complete telemetry of feeders. Alternate feeders. Total planned relief. (Stage wise) Total actual relief. (Stage Wise)

113 UFR, df/dt displays: UP Feeder-wise planned load relief. Complete telemetry of feeders. Alternate feeders. Total actual relief. (Stage Wise)

114 135 th OCC meeting In addition to the SCADA mapping, States may provide following information regarding the UFR, df/dt relays installed at their respective substations: Source of frequency measurement for UFR, df/dt relay viz. positive sequence, phase-to-neutral, phase-to-phase. Computational time for measurement of frequency, rate of change of frequency in UFR, df/dt relays respectively.

115 Action points Complete updated list of feeders identified for UFR and df/dt based load relief along with nature of load (radial/ non radial), make and model of relay. Display related issues to be resolved/mapped: Feeder-wise planned load relief. Complete telemetry (Analog, Digital) of feeders. Alternate feeders details. Total planned relief. (Stage wise) Total actual relief. (Stage Wise) UFR, df/dt Stage wise sum. Lower actual load as compared to designated relief as observed from NRLDC SCADA data.

116 Video Conferencing NRLDC <<>> Himachal Pradesh SLDC UFR and df/dt Mapping at 11:00hrs

117 UFR displays: Himachal Pradesh Complete telemetry (Analog and digital) of feeders. Total lower actual relief. (Stage Wise)

118 df/dt displays: Himachal Pradesh Complete telemetry (Analog and digital) of Alternate feeders. Total lower planned relief in stage-2 Total lower actual relief. (Stage -1 & 2)

119 Action points Complete updated list of feeders identified for UFR and df/dt based load relief along with nature of load (radial/ non radial), make and model of relay. Display related issues to be resolved/mapped: Complete telemetry of feeders. Complete Alternate feeders. Lower planned load relief in some stage Lower actual load as compared to designated relief as observed from NRLDC SCADA data.

120 Video Conferencing NRLDC <<>> Rajasthan SLDC UFR and df/dt Mapping at 11:00hrs

121 UFR displays: Rajasthan Stage-1 Complete telemetry (Analog and digital) of feeders. Total lower actual relief. (Stage Wise)

122 UFR displays: Rajasthan Stage-2 Complete telemetry (Analog and digital) of feeders. Total lower actual relief. (Stage Wise)

123 UFR displays: Rajasthan Stage-3 Complete telemetry (Analog and digital) of feeders. Total lower actual relief. (Stage Wise)

124 df/dt displays: RAJASTHAN Stage-1 Complete telemetry (Analog and digital) of feeders. Total lower actual relief. (Stage Wise)

125 df/dt displays: RAJASTHAN Stage-2 Complete telemetry (Analog and digital) of feeders. Total lower actual relief. (Stage Wise)

126 df/dt displays: RAJASTHAN Stage-3 Complete telemetry (Analog and digital) of feeders. Total lower actual relief. (Stage Wise)