Facilities Study for XXXXXXXXXXXX 50 MW PV

Transcription

1 Final Report on the Facilities Study for XXXXXXXXXXXX 50 MW PV Project No July 2012

2 Facilities Study for XXXXXXXXXXXX 50 MW PV Prepared for Copany El Paso, Texas July 2012 Project No Prepared by Burns & McDonnell Engineering Copany, Inc. Kansas City, Missouri COPYRIGHT 2012 BURNS & McDONNELL ENGINEERING COMPANY, INC.

3 TABLE OF CONTENTS Page No. CERTIFICATION... 1 EXECUTIVE SUMMARY INTRODUCTION DESCRIPTION OF PROJECT INTERCONNECTION FACILITIES GENERATOR INTERCONNECTION FACILITIES TRANSMISSION PROVIDER INTERCONNECTION FACILITIES NETWORK UPGRADE FACILITIES DISCLAIMER INTERCONNECTION FACILITIES AND NETWORK UPGRADES XXXXXXXXXXXX 345 KV SUBSTATION PHYSICAL ELECTRICAL REQUIREMENTS PROTECTION & CONTROLS REQUIREMENTS FACILITY ESTIMATES PROJECT SCHEDULE SUMMARY...13

4 LIST OF TABLES TABLE E-1: TRANSMISSION PROVIDER INTERCONNECTION FACILITIES COST ESTIMATES... 2 TABLE E-2: NETWORK UPGRADE COST ESTIMATES... 2 TABLE E-3: PROJECT SCHEDULE... 3 TABLE 2-1: XXXXXXXXXXXX 345 KV SUBSTATION UPGRADE TRANSMISSION PROVIDER INTERCONNECTION FACILITIES COST ESTIMATE TABLE 2-2: XXXXXXXXXXXX 345 KV SUBSTATION UPGRADE NETWORK UPGRADE COST ESTIMATE TABLE 3-1: XXXXXXXXXXXX 345 KV SUBSTATION SCHEDULE TABLE 4-1: TRANSMISSION PROVIDER INTERCONNECTION FACILITIES COST ESTIMATES TABLE 4-2: NETWORK UPGRADE COST ESTIMATES LIST OF FIGURES FIGURE 1-1: EXISTING XXXXXXXXXXXX 345 KV SUBSTATION CONFIGURATION... 4 FIGURE 1-2: RECONFIGURED XXXXXXXXXXXX 345 KV SUBSTATION CONFIGURATION... 5 FIGURE 2-1: SLD FOR XXXXXXXXXXXX 345 KV SUBSTATION AND POI CONFIGURATION... 9 APPENDICES APPENDIX A: APPENDIX B: APPENDIX C: SWITCHING TRANSIENT STUDY BILL OF MATERIALS PROJECT SCHEDULES * * * * *

5 CERTIFICATION Texas State - Certification I hereby certify, as a Professional Engineer in the state of Texas, that the inforation in this docuent was assebled under y responsible charge. This report is not intended or represented to be suitable for re-use by Copany or others without specific verification or adaptation by the Engineer (Burns & McDonnell). This certification is ade in accordance with the provisions of the laws and rules of the Texas State Board of Engineers Adinistrative Code. Approved P.E. Seal Electrical Engineer Kirk Saint Alwyn Powell, P.E. TX License No Date: July 30, 2012 July Burns & McDonnell

6 EXECUTIVE SUMMARY A Facility Study was perfored to exaine the cost and schedule of s (EPE) facilities identified in the XXXXXXXXXXXX 50 MW PV Syste Ipact Study for syste constraints and to define the project requireents for the facilities required to itigate the constraints. The XXXXXXXXXXXX project, a 50 MW photovoltaic solar far (MS50PV), has requested interconnection to the EPE transission syste at the XXXXXXXXXXXX 345 kv substation. The proposed in-service date is Deceber The Facility Study defined upgrade costs for the MS50PV interconnection request according to EPE s OATT. In the EPE OATT, costs are allocated into three categories; Generator Interconnection Facilities Costs, Transission Provider Interconnection Facilities Costs, and Network Upgrade Costs: 1. Generator Interconnection Facilities Costs are costs for facilities and equipent owned and operated by the Interconnection Custoer (IC) fro its Generating Facility to the Point of Change of Ownership (typically the first dead-end at the point of interconnection (POI)). The costs for these facilities are paid for by the IC and are not subject to transission credits. These costs are not included herein. 2. Transission Provider Interconnection Facilities Costs are costs for facilities and equipent owned, controlled, or operated by the Transission Provider fro the Point of Change of Ownership to the POI. The costs for these facilities are paid for by the IC and are not subject to transission credits. 3. Network Upgrade Costs are costs for additions, odifications, and upgrades to the Transission Provider s Transission Syste (i.e. EPE) required at or beyond the POI to accoodate the interconnection of the Large Generating Facility to the Transission Provider s Transission Syste. These costs are paid for by the IC and are subject to refund through transission credits. Based on the EPE OATT cost categories, the following tables show the costs for the Transission Provider Interconnection Facilities and Network Upgrades. Table E-1 shows that the Transission Provider Interconnection Facilities cost for XXXXXXXXXXXX 345 kv Substation is $699,000. Table E-2 shows that the Network Upgrade cost for the XXXXXXXXXXXX 345 kv Substation is $1,001,000. Table E-1: Transission Provider Interconnection Facilities Cost Estiates Ite Material Cost Labor Cost Engineering XXXXXXXXXXXX 345 kv Substation Construction Manageent Contingency Total $315,000 $92,000 $75,000 $100,000 $117,000 $699,000 Table E-2: Network Upgrade Cost Estiates Ite Material Cost Labor Cost Engineering XXXXXXXXXXXX 345 kv Substation Construction Manageent Contingency Total $366,000 $322,000 $75,000 $70,000 $168,000 $1,001,000 July Burns & McDonnell

7 To eet the desired backfeed energization in October 2013 and in-service date of Deceber 2013, preliinary engineering should coence by Septeber With a project start date of Septeber 2012, the desired coercial operation date is achievable based on the project schedule shown in Table E-3. Table E-3 below shows the start and finish dates for each project phase. Table E-3: Project Schedule Project Phase Start Date Finish Date Preliinary Engineering Sep-12 Oct-12 Detailed Engineering Oct-12 Jan-13 Procureent Oct-12 Aug-13 Construction Aug-13 Oct-13 Line Outage Sep-13 Sep-13 Energization Sep-13 Oct-13 Coercial Operation Dec-13 Dec-13 Project Schedule Sep-12 Dec-13 * * * * * July Burns & McDonnell

8 1. INTRODUCTION 1.1 DESCRIPTION OF PROJECT (EPE/Transission Provider) has requested Burns & McDonnell Engineering (BMcD/Engineer) to perfor a Facility Study to exaine the EPE facilities identified in the XXXXXXXXXXXX 50 MW PV Syste Ipact Study 1 (XXXXXXXXXXXX SIS) for syste constraints and to define the project requireents for each of the facilities required to itigate the constraints. The XXXXXXXXXXXX SIS, which was copleted in March 2012, studied the integration of 50 MW of photovoltaic generation proposed to interconnect to the transission syste at the existing XXXXXXXXXXXX 345 kv substation point of interconnection (POI). The XXXXXXXXXXXX 50 MW photovoltaic generator project (MS50PV) was studied as an Energy Resource Interconnection Service (ERIS), which allows the MS50PV to connect to the EPE transission syste and deliver output using existing fir or non-fir transission capacity on an as available basis. The desired in-service date for the XXXXXXXXXXXX PV far is Deceber 2013 with backfeed energization in October The XXXXXXXXXXXX 345 kv substation has a three position ring bus configuration. An existing 50.4 MW XXXXXXXXXXXX Wind Far connects to one of the positions. The reaining two positions connect the 345 kv lines to Springerville 345 kv and Luna 345 kv substations. Figure 1-1 shows the existing configuration of the XXXXXXXXXXXX 345 kv substation. Figure 1-1: Existing XXXXXXXXXXXX 345 kv Substation Configuration To Springerville 345 kv Substation Macho Springs Wind Far 50.4 MW Macho Springs 345 kv Substation M Existing Revenue Metering 54 MVAR Reactor To Luna 345 kv Substation 30 Miles MS50PV requested interconnection to the XXXXXXXXXXXX 345 kv substation by tapping into the existing 50.4 MW wind far generation interconnection tie line (gen-tie). However, after the 1 MS50S ERIS final report March July Burns & McDonnell

9 XXXXXXXXXXXX SIS and during the initial phases of the Facility Study kickoff eeting, EPE deterined that MS50PV could not connect to the XXXXXXXXXXXX wind far gen-tie line due to space liitations and syste reliability concerns. Therefore, the XXXXXXXXXXXX 345 kv substation requires odification to accoodate the additional interconnection of MS50PV. A fourth position is required for this new connection and this Facility Study assues that MS50PV will interconnect to the new fourth position. Figure 1-2 shows the assued reconfiguration of the XXXXXXXXXXXX 345 kv substation and the location of the MS50PV POI. Figure 1-2: Reconfigured XXXXXXXXXXXX 345 kv Substation Configuration To Springerville 345 kv Substation Macho Springs Wind Far Macho Springs 345 kv Substation 54 MVAR Reactor 50.4 MW M Existing Revenue Metering Revenue Metering For Solar Plant Macho Springs Solar Park M Custoer s Point Of Interconnection Change of Ownership Point To Luna 345 kv Substation 30 Miles 50 MW Color Code Existing Facilities Network Upgrades Facilities Transission Provider Facilities Generator Interconnection Facilities With the addition of a fourth position at XXXXXXXXXXXX 345 kv substation, a switching transient study with transient recovery voltage (TRV) had to be perfored to assess possible concerns for excessive TRVs during circuit breaker switching operations. The study also included perforing analysis for teporary overvoltage (TOV) to deterine whether an oscillatory overvoltage ay negatively affect the theral stability of the existing and new surge arresters. Results fro the switching transient study are located in Appendix A. July Burns & McDonnell

10 1.2 INTERCONNECTION FACILITIES In EPE s OATT, costs are allocated into three categories; Generator Interconnection Facilities Costs, Transission Provider Interconnection Facilities Costs, and Network Upgrade Costs. Details of the three cost categories for the generation interconnection are provided in Sections 1.2.1, and respectively Generator Interconnection Facilities Generator Interconnection Facilities are facilities paid for by the Interconnection Custoer (IC), owned and operated by the IC fro the generator facilities to the Change of Ownership Point. The Change of Ownership Point is the dead-end pole that connects the interconnection line into the POI substation. The interconnection custoer will be responsible for the design, engineering and construction of all facilities up to the Change of Ownership Point. The Generator Interconnection Facilities include all generator step-up transforers, breakers, and any VAR support equipent needed to get the generation to the XXXXXXXXXXXX 345 kv substation for the MS50PV project respectively Transission Provider Interconnection Facilities Transission Provider Interconnection Facilities are facilities paid for by the IC but owned and operated by EPE fro the Change of Ownership Point to the POI. These costs include facilities fro the interconnection line dead-end pole to the POI (including the pole, wire fro the pole to the POI and the revenue etering equipent). The costs of the Transission Provider Interconnection Facilities are not subject to transission credits. The Transission Provider Interconnection Facilities required for the interconnection of MS50PV include the interconnection line dead-end pole to the XXXXXXXXXXXX 345 kv POI bus terination point, etering units, interconnection line switch, and expanded bus work Network Upgrade Facilities Network upgrades are facilities fro the POI out to the transission syste, which are paid for by the IC but owned and operated by EPE. The costs of the Network Upgrades are subject to being reibursed fro EPE to the IC in the for of transission credits. The Network Upgrades required for interconnection of MS50PV include upgrading the existing three position ring bus at XXXXXXXXXXXX 345 kv substation to a four position ring bus substation. Additional network upgrades include odifying the control house and reconfiguring the substation footprint to accoodate the new fourth position updating protection and control schees to accoodate the new breaker position. July Burns & McDonnell

11 1.3 DISCLAIMER Estiates, forecasts, projections, and schedules relating to costs, quantities, deand pricing (including but not liited to, property costs, construction, operation or aintenance costs, and/or energy or coodity deand and pricing), are opinions based on the Engineer s experience, qualifications and judgent. The Engineer has no control over the weather, cost and availability of labor, aterials and equipent, labor productivity, energy or coodity pricing, deand or usage, population deographics, arket conditions, change in technology, and other econoic or political factors effecting such estiates or projections. The Transission Provider acknowledges that actual results ay vary significantly fro the representations and opinions herein. Nothing herein will be construed as a guarantee or warranty (actual or iplied) that rates, deand, pricing, costs, perforance schedules, quantities, technology, or any other related ites will not vary fro the opinions contained in the report prepared by the Engineer. * * * * * July Burns & McDonnell

12 2. INTERCONNECTION FACILITIES AND NETWORK UPGRADES The following section describes the facility upgrades required for the interconnection of MS50PV and the corresponding facility cost estiates. The cost estiates for facilities are provided with a plus or inus 20% accuracy. The contingency costs are rounded up to the nearest thousand. 2.1 XXXXXXXXXXXX 345 KV SUBSTATION To accoodate an additional 50 MW of generation load fro MS50PV to EPE s syste, the XXXXXXXXXXXX 345 kv substation three-position ring bus requires expansion to add a fourth line position. The general assuptions ade in the design and cost estiate of the substation facility upgrades are as follows: 1. Cost estiates were based on 2012 dollars, no escalation or discount rates were included. 2. Costs adjusted to El Paso, TX city cost index. 3. No state, county or city taxes were included. 4. Contingency costs were assued to be 20% of the total engineering, aterial, labor and construction costs rounded up to the nearest thousand. 5. Engineering costs include detail design engineering and design engineering anageent. 6. Direct costs for EPE ay include, but are not liited to EPE progra anageent, project anageent and overhead costs and were included in the Network Upgrade cost estiates. The cost of the XXXXXXXXXXXX 345 kv substation upgrades includes both Transission Provider Interconnection Upgrades and Network Upgrades. As described in Section 1.2.2, Transission Provider Interconnection Upgrades include the transission facilities between MS50PV Change of Ownership Point and the terination point (POI) at the XXXXXXXXXXXX 345 kv substation bus, as well as any revenue etering upgrades between the POI and the Change of Ownership Point. Network Upgrades, described in Section 1.2.3, include adding a new fourth line position to the existing ring bus at XXXXXXXXXXXX 345 kv substation, odifying the control house and expanding the substation footprint to accoodate the new fourth position updating protection and control schees to accoodate the new breaker position. Network upgrades start fro the POI towards to the EPE transission syste. Figure 2-1 shows a high level illustration of the ajor transission interconnection and network upgrades required to interconnect MS50PV to XXXXXXXXXXXX 345 kv substation. July Burns & McDonnell

13 Figure 2-1: SLD for XXXXXXXXXXXX 345 kv Substation and POI Configuration To Springerville 345 kv Substation To Luna 345 kv Substation 9188E 8388E 54 MVAR 3418B G 5538B G NEW BREAKER G Custoer s Point Of Interconnection G 2468B 0878H G 1238B Revenue Metering For Solar Plant Existing Revenue Metering M M G 1758B G Macho Springs Wind Far Macho Springs Solar Park Color Code Existing Facilities Network Upgrades Required for Interconnection Developer Equipent Located at POI Developer Equipent The interconnection and Network Upgrade design and construction assuptions are listed below. No site grading is required. No additional station service is necessary. The station battery syste has adequate reserve capacity to support the new equipent to be installed. The existing station grounding grid and syste can provide adequate personnel and equipent protection with the increased available fault current. The existing station lightning protection will be odified to allow for bus expansion. Two existing shield wire pole foundations will be deolished approxiately one foot below grade. July Burns & McDonnell

14 The location of the shield wire pole foundations will not interfere with future equipent foundations. The existing shield wire pole that is being reoved is assued to be abandoned on site. The existing station lighting is adequate for this scope of work. All steel structure designs will be standard and assued to be sufficient. All aterial up to and including the CT/PT cobo units will be procured with this scope of work. Station construction anageent costs include supervision and anageent of the construction process. Station engineering costs are budgetary. Final engineering costs will be provided when a request for proposal (RFP) is issued to Engineer Physical Electrical Requireents Physical electrical requireents to upgrade XXXXXXXXXXXX 345 kv to a new ring bus include: Install a new breaker and otor operated vertical break switch at the South-East corner of the existing ring bus to create a fourth position. Extend the bus at the South-West corner of the ring bus towards the West (custoer station) to create the new POI. Reove an existing shield wire pole to ake roo for the bus expansion. Relocate an additional shield wire pole directly north of the bus expansion to provide adequate lightning protection. Install a otor operated vertical break switch and three CT/PT cobo units inside the XXXXXXXXXXXX 345 kv substation to provide appropriate circuit isolation, protection and etering for the new interconnection Protection & Controls Requireents The addition of the new breaker position also affects several existing protection schees. Multiple CT and PT circuits will need to be rewired to accoodate the new line position. One differential and breaker failure protection panel and one revenue etering panel will need to be installed in the existing control building to provide protection and etering of the new interconnection Facility Estiates Table 2-1 shows the Transission Provider Interconnection Facilities cost estiates associated with interconnecting MS50PV to the XXXXXXXXXXXX 345 kv substation. The total Transission Provider Interconnection Facilities cost for the MS50PV interconnection to EPE s syste is $699,000. Table 2-1: XXXXXXXXXXXX 345 kv Substation Upgrade Transission Provider Interconnection Facilities Cost Estiate XXXXXXXXXXXX Interconnection Upgrades Material Cost Labor Cost Engineering Construction Manageent Substation Electrical $315,000 $92,000 $75,000 $100,000 $582,000 Syste Protection & Control $0 $0 $0 $0 $0 Total Substation Cost Estiate without Contingency $315,000 $92,000 $75,000 $100,000 $582,000 Contingency (20%) $63,000 $19,000 $15,000 $20,000 $117,000 Total XXXXXXXXXXXX Interconnection Upgrades $378,000 $111,000 $90,000 $120,000 $699,000 Total July Burns & McDonnell

15 The Network Upgrade costs to interconnect MS50PV to the XXXXXXXXXXXX 345 kv substation are shown in Table 2-2 below. The total Network Upgrade cost for the XXXXXXXXXXXX 345 kv substation to accoodate MS50PV interconnection is $1,001,000. Table 2-2: XXXXXXXXXXXX 345 kv Substation Upgrade Network Upgrade Cost Estiate XXXXXXXXXXXX Interconnection Upgrades Material Cost Labor Cost Engineering Construction Manageent Total Substation Electrical $286,000 $179,000 $25,000 $50,000 $540,000 Syste Protection & Control $80,000 $30,000 $50,000 $20,000 $180,000 EPE Direct Costs $0 $113,000 $0 $0 $113,000 Total Substation Cost Estiate without Contingency $366,000 $322,000 $75,000 $70,000 $833,000 Contingency (20%) $74,000 $65,000 $15,000 $14,000 $168,000 Total Substation Cost Estiate $440,000 $387,000 $90,000 $84,000 $1,001,000 The corresponding bill of aterials is located in Appendix B. * * * * * July Burns & McDonnell

16 3. PROJECT SCHEDULE The project schedule for upgrading the XXXXXXXXXXXX 345 kv substation to accoodate the desired MS50PV far coercial operation date of Deceber 2013 is shown below. Preliinary engineering should begin in Septeber 2012, followed iediately by detailed engineering and procureent. The Luna to XXXXXXXXXXXX 345 kv line is scheduled to be taken out of service id- Septeber 2013 for approxiately 1 week during a 2 week period. The actual schedule will largely depend on obtaining perission fro EPE operations based on syste conditions during that period. Table 3-1 shows the engineering, procureent, construction, line outage and energization schedules for the MS50PV interconnection to the XXXXXXXXXXXX 345 kv substation. Fro preliinary engineering to energization, the project duration is 14 onths. Table 3-1: XXXXXXXXXXXX 345 kv Substation Schedule Project Phase Start Date Finish Date Preliinary Engineering Sep-12 Oct-12 Detailed Engineering Oct-12 Jan-13 Procureent Oct-12 Aug-13 Construction Aug-13 Oct-13 Line Outage Sep-13 Sep-13 Energization Sep-13 Oct-13 Coercial Operation Dec-13 Dec-13 Project Schedule Sep-12 Dec-13 A detailed project schedule can be found in Appendix C. * * * * * July Burns & McDonnell

17 4. SUMMARY The interconnection of MS50PV to the XXXXXXXXXXXX 345 kv substation requires upgrades to existing syste facilities as identified in the XXXXXXXXXXXX SIS. The cost estiates for the Transission Provider Interconnection Facilities and the Network Upgrades are presented in Table 4-1 and Table 4-2 below respectively. Transission Provider Interconnection Facilities costs are $699,000 and the Network Upgrade costs are $1,001,000. Table 4-1: Transission Provider Interconnection Facilities Cost Estiates Ite Material Cost Labor Cost Engineering XXXXXXXXXXXX 345 kv Substation Construction Manageent Contingency Total $315,000 $92,000 $75,000 $100,000 $117,000 $699,000 Table 4-2: Network Upgrade Cost Estiates Ite Material Cost Labor Cost Engineering XXXXXXXXXXXX 345 kv Substation Construction Manageent Contingency Total $366,000 $322,000 $75,000 $70,000 $168,000 $1,001,000 Based on the desired energization date of October 2013 and coercial operation date of Deceber 2013, the project should start preliinary engineering by Septeber The project duration fro preliinary engineering to coercial operation is expected to be 16 onths. A detailed schedule is shown in Section 3. * * * * * July Burns & McDonnell