March 4, Mona Substation Line position & assoc relaying, communications & metering

Transcription

1 700 N.E. Multnomah, Suite 550 Portland, OR March 4, 2004 Merrill Brimhall PacifiCorp Merchant 201 South Main, Suite 2200 Salt Lake City, Utah Dear Mr. Brimhall: PacifiCorp Transmission Systems has completed the Generation Interconnection Facilities Study ("Facilities Study") pursuant to the October 21, 2003 Generation Interconnection Facilities Study Agreement ("Study Agreement") for Phase I of the Current Creek Generation Project. The Facilities Study determined the enclosed Scope of Work and the estimated cost for facilities to be completed by PacifiCorp Power Delivery for the interconnection of Phase I with Mona Substation. PacifiCorp's estimated cost required to complete the required interconnection facilities for Phase I is $4,123,468, broken down as follows: Mona Substation Line position & assoc relaying, communications & metering Engineering $ 487,679 Materials 947,338 Installation 1,799,287 Overheads 371,944 Total $3,606,248 Current Creek Substation Relay panel, communications, RTU & assoc testing Engineering $ 132,970 Materials 158,538 Installation 108,299 Overheads 45,977 Total $ 455,784

2 Lake Mountain Microwave Site Communications modifications Engineering $ 10,962 Materials 2,743 Installation 2,117 Overheads 1,820 Total $ 17,642 Salt Lake Control Center Communications modifications Engineering $ 22,894 Materials 7,064 Installation 13,736 Overheads 5,025 Total $ 48,719 Sigard Substation Communications modifications Engineering $ 3,447 Materials 638 Installation 467 Overheads 523 Total $ 5,075 Total Estimated Cost Engineering $ 657,952 Materials 1,116,321 Installation 1,923,906 Overheads 425,289 Total $4,123,468 If you have any questions, please call Larry Soderquist at (503) or Dan Johannsen at (503) Sincerely, Enclosure cc: Colin Persichetti 600 LCT David B. Cory Director, Transmission Services

3 Attachment B Scope of Work I. Currant Creek Generation Interconnection Project Scope (Phase I) A. Mona Substation (design, procurement, installation, and testing) Transmission Provider will be responsible for: Transmission Provider will provide the design and procure all the materials and equipment required to complete the necessary modifications at Mona Substation associated with the interconnection of the Currant Creek 525 MW (Phase I) generation facility to the 345kV system. In addition, Transmission Provider will complete all the work necessary to install and test the required substation equipment and materials including civil, communications, protection & controls, metering, and SCADA in the Mona Substation associated with the interconnection of the Currant Creek 525 MW (Phase I) generation facility. Transmission Provider will complete the connection of the 345kV transmission line to the 345 kv bus inside Mona Substation. Transmission Provider will provide specifications for the 345kV transmission line connecting Interconnection Customer s switchyard with Mona Substation and the fiber optic cable used for protection & control and communications. B. Currant Creek Substation (design, procurement, installation, and testing) Interconnection Customer shall be responsible for: Interconnection Customer shall be responsible for providing the design, procurement, installation, and testing of all materials and equipment required for the interconnection of the Currant Creek 525 MW generation facility to the 345kV system at Mona Substation except those items identified below to be the responsibility of Transmission Provider. Interconnection Customer shall be responsible for the installation of the Transmission Provider provided metering and protection & control panel required at Currant Creek Substation for the sole purpose of interconnecting the generation facility to the 345kV system at Mona Substation. Interconnection Customer shall provide switchyard operational design drawings to Transmission Provider for review. The switchyard shall be designed and built to meet Transmission Provider s standards, specifications, and practices for such facilities connecting to Transmission Provider s 345kV transmission system. Transmission Provider will be responsible for: Transmission Provider will design and procure the meter and protection & control panel for the 345kV line protection. Transmission Provider will provide the design documentation for the line P&C panel and the relay settings for the 345 kv transmission line interconnecting the Currant Creek Substation to Mona Substation FS Scope of Work FINAL to OASIS.doc Page 1 of 11

4 Transmission Provider will design, procure, and install the RTU and some of the communications equipment (identified below) that is required at the Currant Creek Substation for the sole purpose of interconnecting the Currant Creek Generation facility with Mona Substation. Transmission Provider will be responsible for reviewing Interconnection Customer s switchyard operational design drawings. In addition, Transmission Provider will test the required communications, metering, protection & control panel, and RTU equipment required at Currant Creek Substation for the sole purpose of interconnecting with Mona Substation prior to the equipment being placed in-service. C. Installation 1. Mona Substation Work to be completed by both Transmission Provider and Interconnection Customer as noted below a) Substation Mona Substation (all work to be completed by Transmission Provider except where otherwise noted) Interconnection Customer will terminate the new 345 kv transmission line on a new 60 high full tension dead-end tower provided by Transmission Provider in-line with a new 345kV Bay just inside the south fence in the lower level of Mona Substation. Transmission Provider will extend the existing 345kV north main bus and south main bus into the lower level yard. Both main buses will be 6 EHPS aluminum. The new cross bus will be 5 IPS Aluminum and kcm bundled aluminum conductor. This work will require the following equipment: 1. Two 362kV 2000 amp Circuit Breakers (GE-Hitachi HVB) with pre-insertion resistors 2. Four 345kV 2000 amp breaker disconnect switches (double side break) 3. One 345kV 2000 amp Line disconnect switch (double side break) with grounding blades 4. One 345kV Line full tension dead-end structure 5. One set of 345kV instrument transformers for revenue metering (3 CCVT s and 3 CT s with extended accuracy range) 6. Foundations for all the above structures 7. Grounding mat extension into the lower yard 8. New cable trench to the control building for all wiring for indication and revenue metering, control, power, lighting, and receptacles. All wiring used from the equipment in the yard into the control house shall be multi-conductor shielded cable (#10 or larger) as specified in PacifiCorp s standard ZS Substation yard lighting and receptacles with a local AC panel FS Scope of Work FINAL to OASIS.doc Page 2 of 11

5 10. Coordination of the microwave tower relocation 11. Connection to the customer s point of contact at the full tension dead-end structure kV station class lightning arrestors, complete with support structures and foundations. Additional work will also be required in the control building. This will include installation and interconnection of: 1. Two 12-inch breaker control panels 2. One 24-inch static relay panel 3. One RTU rack 4. Inter-panel wiring. The control cable used for inter-panel wiring inside the control house shall be non-shielded cable as specified in PacifiCorp s standard ZS A new 40 position DC LC, a new 42 position AC LC, and a new 44 point Annunciator Panel. (Depending on the timing of the construction these panels may not be necessary). b) Civil Mona Substation (all work to be completed by Transmission Provider) Since future development of Mona Substation to the east of the Currant Creek interconnection bays will not be possible, the first bay position will be placed along the east fence in the lower yard of Mona Substation and the yard will be expanded to the east approximately 100 feet for the second line position coming from Currant Creek Generation for (Phase II) of the project. The 345kV yard will be expanded 90 feet to the north. Approximately 400 feet of existing fence will be relocated and 180 feet of new fence will be installed. Approximately SF of ground needs to cleared, grubbed, and graded. Approximately 2900 SF of the expanded yard to the north will be graded to a 1:1 slope to match existing conditions and require large boulders for erosion control. The expanded area (less the slope) will have 4 of yard and road finish rock placed over an aggregate base course. The existing yard surfacing will be repaired after below grade construction to include base rock backfill and four inches of insulating rock. Install 400 of new cable trench with 30 wide road crossing and 4 protective bollards The following structures and foundations are required: high 3-phase bus support structures with 2 pier foundations per structure 7 345kV switch support structures with 2 pier foundations per structure FS Scope of Work FINAL to OASIS.doc Page 3 of 11

6 3 CCVT support structures with pier foundations 3 CT support structures with pier foundations 3 Lightning arrestor support structures with pier foundations 1-50 full tension dead-end structure with 10 static mast (2 columns with spread foundations) phase pull-off structure with drilled pier foundations 2 Circuit breaker foundations The oil spill plan (SPCC Plan) will be updated and revised to reflect the addition of the oil filled VTs. c) Protection & Control Mona Substation (all work to be completed by Transmission Provider) A new 345 kv bay position will be added at Mona Substation as part of the interconnection of the Current Creek Generation to 345kV system at Mona Substation. For that addition the following protection and control work will be done at Mona Substation: 1) Addition of two panels for the control, protection, and indication metering of the two new 345kV circuit breakers. 2) Addition of one panel for the protection and indication metering of the new 345kV line. The protection for this line will use two systems. Two current differential systems using SEL 311L relays communicating over two separately routed fiber-optic cables. 3) Fiber jumper cables between the SEL-311L relays and the fiber optic cable patch boxes. 4) Development of the relay settings for the line and breaker protection. 5) There is an existing digital fault recorder (DFR) in the substation, but there are no spare channels to monitor the new breakers and line position. A new 32-channel DFR will be procured and installed for the additional breakers and line position. This new DFR will connect to an existing Teltone SLSS that will provide 2-wire phone access to the DFR and its modem. d) Communications Mona Substation (work to be completed by both Transmission Provider and Interconnection Customer as noted below) One SONET fiber optic terminal will be installed at Mona Substation. Two diverse routes of fiber cables will be installed between Mona Substation and Currant Creek Substation by Interconnection Customer. These fiber cables will provide for two separate protection routes for the 345 kv line (SEL 311L relaying) and two paths for the SONET FS Scope of Work FINAL to OASIS.doc Page 4 of 11

7 equipment. Both protection routes will be via direct fiber. The SONET will provide for all other communications channels between Mona Substation and Currant Creek Substation. 1. Interconnection Customer will install and terminate two fiber cables, using diverse paths, coming from Currant Creek Substation to Mona Substation and provide splice boxes (hand-holes) as required. Interconnection Customer will procure and install the fiber cables and associated materials and equipment to install and terminate the fiber cables on patch panels at each end in the control buildings. Transmission Provider will provide a pathway for routing the fiber cables from the kV line dead-end structure to the control building and from a point approximately 10 outside the east fence line of Mona Substation to the control building. Transmission Provider will install all the additional associated hardware, innerduct, racks, fiber distribution centers, etc. required inside the control building beyond the patch panels where Interconnection Customer will terminate the fiber cables. The fiber cables will provide for two separate protection routes for the 345 kv line (SEL 311L relaying) and two paths for the SONET equipment. Transmission Provider will be responsible for: 1. Purchase and install one new SONET terminal (Lucent DMXplore). 2. Purchase and install one new Coastcom 2-T1 channel bank shelf. 3. Install 7 ea. Coastcom circuits (two telemetry, one substation SCADA, one plant SCADA, and three OPXs for Schweitzer, meters, and voice). Five of the circuits will be back-to-back channels to SCC. One telemetry channel will be for watt telemetry to the Sigurd alternate control center via Lake Mtn. and the second telemetry channel will be to SCC. 4. Install two Schweitzer 2830 fiber modems for the SEL 311L Mirrored Bits protection over the Coastcom and a single mode duplex jumper between the SEL 311Ls over the ADSS fiber. 5. Provide telemetry equipment and audio bridge equipment to SCC dispatch and Sigurd for alternate control (RFL 98 TMX Transmitter) at the substation. 6. Install miscellaneous equipment to include: racks, fuse panels, and DSX jack-fields. 7. The new Currant Creek Plant facility may obstruct the existing microwave path between Mona Substation and Nebo. If this occurs, it will be necessary to relocate the existing 30-foot microwave tower to provide a clear path. A new tower will be installed or the existing tower will be relocated to provide the required microwave path clearance between Mona Substation and Nebo. A determination of whether or not the existing path will be obstructed will be made after the exact location of the plant has been resolved FS Scope of Work FINAL to OASIS.doc Page 5 of 11

8 e) SCADA Mona Substation (all work to be completed by Transmission Provider) 1. All RTU modifications will be designed, wired and installed by Transmission Provider personnel. 2. The existing RTU will use spare points to accommodate the Revenue Inter-tie Metering analog outputs (MW and MVAR). 3. EMS data base changes will be made to support the new points. All scale factor information will be provided by Transmission Provider Engineering. f) Transmission Mona Substation (work to be completed by both Interconnection Customer and Transmission Provider as noted below) Interconnection Customer shall terminate the incoming transmission line on the full tension dead-end structure just inside of the south fence line of Mona Substation. Interconnection Customer shall procure and install the insulators used for terminating the 345kV line on the full tension dead-end structure and provide the 4-hole pads on the incoming line for Transmission Provider to connect jumpers to the incoming line. The full tension tower will be designed and installed by Transmission Provider. Transmission Provider will install the taps from the 345kV line to the 345kV bus inside the substation. g) Metering Mona Substation (Delivery Point Metering all work to be completed by Transmission Provider) All revenue metering and corresponding instrument transformers will be designed, procured, and installed by Transmission Provider personnel. Revenue Inter-tie Metering 1. Siemens meters will be used for primary delivery point metering. The primary meter will provide SCADA input s and back-up meter will provide telemetry input s 2. SCADA analog outputs for MW and MVAR. In addition, two accumulators are required one for MWH delivered and one for MWH received (dispatch) 3. Modem communications for dial-up metering 4. Note both Telemetry and SCADA metering will be required. 345 kv instrument transformers (wye connected) 1. Revenue current transformers shall be dedicated entirely for metering. The transformers shall be wound type.15 percent high accuracy with a ratio of (1000/5) FS Scope of Work FINAL to OASIS.doc Page 6 of 11

9 2. Voltage Transformers (1800:1) Wound type transformers are the present standard but some CCVT types are acceptable by meter engineering 2. Currant Creek Substation a) Protection & Control Currant Creek Substation (work to be completed by both Transmission Provider and Interconnection Customer as noted below) Transmission Provider will supply the line protection & control panel for Currant Creek Substation for the protection of the 345kV transmission line that will terminate in Mona Substation. The panel will contain two relay systems. Two current differential relay systems using SEL 311L relays communicating over two separately routed fiber optic cables. Also, on the panel will be a GPS satellite clock to provide accurate time tagging of the relay event records, a modem and a data switch to access the fault records from the relays using a voice grade channel over the fiber communications cables. Transmission Provider will supply the panel, documentation for the panel, the relay settings, and test the relays prior to them being placed inservice. Interconnection Customer shall develop the design drawings and install the cabling between the potential transformers, current transformers, circuit breaker s control circuits, and the protection & control panel provided by Transmission Provider. In addition, Interconnection Customer shall provide ungrounded 125VDC circuits for powering the equipment on the protection & control panel. The tie breaker(s) at Currant Creek Substation shall be equipped with the following: Maximum fault clearing time of 3 cycles Two current transformer (CT) sets, one for each of the line relays CT rated at the load rating of the breaker Relay accuracy CT C800 CT are cabled into the control house with one 4 conductor #10 Cu wire in shielded cable per CT Breaker failure relay protection on each of the tie breakers. Interconnection Customer shall provide a three-phase set of 345kV potential transformers (PT) or capacitive coupling potential devices on the 345 kv line to Mona Substation. The PTs shall be connected line to ground on the line to Mona Substation or on a location on the bus that is energized any time any one of the generators are connected to the system. Three phase 67 volt line to neutral shall be cabled into the control house using #10 Cu conductors in a shielded cable. The control cable used from the equipment in the yard into the Transmission Provider provided protection & control panel inside the FS Scope of Work FINAL to OASIS.doc Page 7 of 11

10 control house shall be multi-conductor shielded cable as specified in Transmission Provider s standard ZS The control cable used for inter-panel wiring inside the control house shall be non-shielded cable as specified in Transmission Provider s standard ZS The CT circuits shall be connected using 4-conductor #10 shielded cable as specified in Transmission Provider s standard ZS b) Communications Currant Creek Substation (work to be completed by both Transmission Provider and Interconnection Customer as noted below) Interconnection Customer will be responsible for: One SONET fiber optic terminal will be installed at Currant Creek Substation. Two diverse routes of fiber cables will be installed between Currant Creek Substation and Mona Substation. These fiber cables will provide for two separate protection routes for the 345 kv line (SEL 311L relaying) and two paths for the SONET equipment. Both protection routes will be via direct fiber. The SONET will provide for all other communications channels between Mona Substation and Currant Creek Substation. 1. Interconnection Customer will install and terminate two fiber cables, using diverse paths, going to Mona Substation and provide splice boxes (hand-holes) as required. Interconnection Customer will procure and install the fiber cables and associated materials and equipment to install and terminate the fiber cables on patch panels at each end in the control buildings. Transmission Provider will procure and install the additional associated equipment and materials as identified below. The fiber cables will provide for two separate protection routes for the 345 kv line (SEL 311L relaying) and two paths for the SONET equipment. 2. Interconnection Customer will procure and install a new 48 VDC wet cell battery in the Currant Creek substation control building along with a new battery charger to supply the required power for the communications equipment. Transmission Provider will be responsible for: 1. Purchase and install one new SONET terminal (Lucent DMXplore) at the substation. 2. Purchase and install one new Coastcom 2-T1 channel bank shelf at the substation. 3. Install 5 ea. Coastcom circuits (one substation SCADA, one plant SCADA, and three OPXs for Schweitzer, meters, and voice) at the substation. 4. Install two Schweitzer 2830 fiber modems for the SEL 311L Mirrored Bits protection over the Coastcom and a single mode FS Scope of Work FINAL to OASIS.doc Page 8 of 11

11 duplex jumper between the SEL 311Ls over the ADSS fiber at the substation. 5. Install miscellaneous equipment to include: racks, fuse panels, DSX jack-fields, and two Teltone SLSS s for dial access to end devices (Schweitzer Relays and meters). c) SCADA Currant Creek Substation (work to be completed by both Interconnection Customer and Transmission Provider as noted below) Transmission Provider will provide an RTU that is mounted on a 19- inch rack, configured and wired to interface terminal blocks. The RTU will communicate with the System Dispatch SCADA master. RTU Points Required (Note: this is not a detailed points list, but only a general overview): Status of all generator breakers and each of the three 345 kv transformer high side breakers. Net MWh and gross MWh reads for each generator unit at Currant Creek Net Generation (MW, MVAR - gross generator less auxiliary load) on the high side of each step-up transformer. Note, total net generation (MW, MVAR) is also required, but it can be picked up from the bi-directional revenue meter at Mona Substation. The total net generation will be required for delivery to the control center as real time data. 345 kv bus voltage at Currant Creek - measured at the Currant Creek side of the switch on the interconnecting line. Interconnection Customer shall be responsible for: 1. Assisting in the check out of all analog or digital points originating from their equipment. 2. Providing any scaling information as required for points originating from their equipment. 3. Providing status points for all 345 kv breakers and all low side generator breakers if used. Providing net MW and MVARs for each generator. All wiring for these points to be brought to the Transmission Provider RTU in Currant Creek substation. The analog points to the RTU shall be 0-1 ma. 4. Providing and installing cable for the voltage outputs from the Transmission Provider procured 345kV interconnecting line protection panel to the Transmission Provider procured and installed RTU FS Scope of Work FINAL to OASIS.doc Page 9 of 11

12 5. Providing and installing cable for the analog output from the RTU in Currant Creek substation to the plant. This circuit will be used by the System Dispatcher for communicating the desired reactive flow target to the Plant Operator to be used in making adjustments in generator output. 6. Providing space in the Currant Creek control building adjacent to the 345kV interconnecting line protection panel for the installation of the Transmission Provider RTU. 7. Providing a 125VDC power source to the installation location of Transmission Provider s RTU for powering the RTU. Transmission Provider will be responsible for: Procuring an RTU that is mounted on a 19 inch rack, configured, and wired to interface terminal blocks. The RTU will communicate via the fiber optic cable channel bank to the System Dispatch SCADA master. The RTU will require Interconnection Customer to provide a 125VDC source for powering the RTU. Transmission Provider will provide a telephone to communicate to the Salt Lake City office to facilitate the testing of the RTU. The RTU will be mounted in the Plant s switchyard control house. EMS data base changes will be made to support the new RTU. d) Transmission Currant Creek Substation (all work to be completed by Interconnection Customer) Interconnection Customer shall complete all terminations of the transmission line inside Currant Creek Substation. 3. Additional Communication Sites Requiring Modifications (all work to be completed by Transmission Provider) a) SCC: 1. The existing Coastcom shelves in SCC will support the channels required for Currant Creek Plant and Substation. 2. Install 6 ea. Coastcom circuits (one telemetry, one Substation SCADA, one Plant SCADA, and three OPX for Schweitzer, meters, and voice). 3. Install telemetry receiver equipment for interchange watts. b) Sigurd Substation: 1. Install telemetry receiver equipment for alternate control center (watts). An existing Coastcom channel card is available for use FS Scope of Work FINAL to OASIS.doc Page 10 of 11

13 c) Lake Mountain Microwave site: 1. Install required back-to-back digital channels. If sufficient capacity exists directly between Mona and SCC, these back-to-back channels will not be required kv Transmission Line from Currant Creek Substation to Mona Substation (all work to be completed by Interconnection Customer except as noted otherwise below) a) 345 kv Transmission Line Design and construct a 345 kv transmission line from Currant Creek Substation to Mona Substation. The transmission line shall be designed, surveyed, and constructed by Interconnection Customer according to Transmission Provider Engineering s standards. Engineering design shall meet Transmission Provider Engineering s Construction Standards (sections TA 001 through TA 201) for Transmission Lines connecting to PacifiCorp s 345kV system. Clearances used for construction shall meet Transmission Provider Engineering s standards TC001 through TC391. The basic structure will be a 345kV D-3 structure with steel poles. Conductor size shall be double vertical-bundled (2-conductors per phase with 18 separation) 954kCM ACSR (Cardinal). Shield wire shall be 3/8 EHS. The OPGW shall be Transmission Provider Engineering s standard diameter cable. Weather loadings on the transmission line structures shall be the worst case of NESC Heavy with overload factors, NESC Light with overload factors and 120 mph wind with 1.0 overload factor. The 120 mph wind will cause a minimum psf wind on structure body, conductors and shield or OPGW wire. All other design parameters shall be coordinated with Transmission Provider s Transmission Engineering Group. Rights-of-Way procurement shall be the responsibility of Interconnection Customer subject to Transmission Provider s Property Department R/W standards. All line materials will be standard Transmission Provider materials supplied by the Interconnection Customer FS Scope of Work FINAL to OASIS.doc Page 11 of 11