XXXX. Bear Creek Hydro Generation Project. Interconnection Facilities Study

Transcription

1 XXXX Bear Creek Hydro Generation Project Interconnection Facilities Study Report No. SPA August 2005 System Planning (Lower Mainland & Vancouver Island) British Columbia Transmission Corporation British Columbia Transmission Corporation, All rights reserved.

2 DISCLAIMER Scope and Limitations: This report was prepared by BCTC solely for the purposes described in this report, and is based on information available to BCTC as of the date of this report. Accordingly, this report is suitable only for such purposes, and is subject to any changes arising after the date of this report. Unless otherwise expressly agreed by BCTC, BCTC does not represent or warrant the accuracy, completeness or usefulness of this report, or any information contained in this report, for use or consideration by any third party, nor does BCTC accept any liability out of reliance by a third party on this report, or any information contained in this report, or for any errors or omissions in this report. Any use or reliance by third parties is at their own risk. 1

3 TABLE OF CONTENTS EXECUTIVE SUMMARY INTRODUCTION TERMS OF REFERENCE Designations SYSTEM STUDIES DESCRIPTION OF INTERCONNECTION FACILITIES Direct Assignment Facilities Transmission Tie to 1L Protection Facilities Control Centre Information Facilities Clowhom Substation Facilities Telecommunications Facilities Field Co-ordination Network Upgrade Facilities Transmission Line Upgrades to 1L Protection Control Telecommunications IMPLEMENTATION AND SCHEDULE COST ESTIMATES FOR FACILITIES Direct Assignments (DA) Facilities Network Upgrade (NU) Facilities... 9 Appendix A Documentation

4 EXECUTIVE SUMMARY This report contains a description and associated costs for the BCTC facilities that are necessary so that the Transmission System can accommodate the Bear Creek Hydro generation project near Sechelt, British Columbia. The interconnection facilities identified have been categorized as Direct Assignment or Network Upgrades. The cost estimate is summarized in the following table:. Direct Assignment (DA) $1,000K Network Upgrades (NU) $560K Total $1,560K (+GST) 3

5 1.0 INTRODUCTION XXXX (IPP) is proposing to develop a hydroelectric power generating facility and integrate it into the Transmission System near Sechelt BC. The IPP will generate a total of MW to be injected into the Transmission System at the BC Hydro Clowhom generating station (COM). The IPP facility consists of Upper Bear and Lower Bear, and a small 138kV substation and is collectively referred to as Bear Creek Hydro (BRK). Upper Bear will have one 13.8 kv generator rated at 13 MVA with a power factor of 0.9, and Lower Bear will have one 13.8 kv generator rated at 8.5 MVA with a power factor of 0.9. Maximum output from Upper Bear and Lower Bear are 11.7 MW and 7.65 MW respectively. The IPP will built a 7.5 km 138 kv overhead transmission line from Upper Bear to Lower Bear, and another 6.2 km 138 kv overhead transmission line from Lower Bear to an proposed 138kV substation within 200m of COM. The proposed in service date of the Bear Creek Hydro IPP is September The point of interconnection is the line side disconnect of BRK on line 1L44 at COM. This report contains a description and associated costs for the BCTC facilities that are necessary so that the Transmission System can accommodate the Bear Creek Hydro generation project. 4

6 2.0 TERMS OF REFERENCE On 12 April 2005, XXXX executed an Interconnection Impact Study and Facilities Study Agreement (Agreement) with BCTC. This report documents the Interconnection Facilities Study portion of the work described in the Agreement. The studies are based on the technical submission of XXXX attached in Schedule A of the Agreement. The Interconnection Impact Study is covered in a separate report (SPA ). Referenced Interconnection Facilities Study documentation is listed in Appendix A of this report. 2.1 Designations The following are BCTC operating designations used throughout this report: Item BC Hydro BC Transmission Corporation System Control Centre Lower Mainland Control Centre South Interior Control Centre Clowhom Substation Gibsons Substation Sechelt Substation Bear Creek Hydro Substation XXXX Operating Designation BCH BCTC SCC LMC SIC COM GIB SEC BRK XXXX 5

7 3.0 SYSTEM STUDIES 3.1 System Studies Results Power flow, short circuit, analytical, transient stability, protection, control, and telecommunications studies were performed to identify transmission system limitations for interconnecting the BRK generation project. Refer to the Interconnection Impact Study - Report No. SPA for details. 4.0 DESCRIPTION OF INTERCONNECTION FACILITIES The interconnection facilities identified have been categorized as Direct Assignment or Network Upgrades. 4.1 Direct Assignment Facilities Transmission Tie to 1L44 A 138kv 4-structure tap line to BRK from the COM switchyard, a distance of under 200m Protection Facilities Connect COM 1L44 line protection (new primary and standby) to BRK 138 kv CB CTs and initiate tripping of that breaker from COM 1L44 and T1 protection. Trip into COM T1 protection from breaker failure protection of BRK 138 kv CB. This will provide backup tripping for faults in the BRK installation Control Centre Information Facilities The following work will be required at LMC, SIC and SCC: Database and display work at LMC, SCC and SIC Commissioning at LMC, SIC and SCC Physical termination of D20 port at LMC Data link facilities from LMC to SCC and SCC to SIC Addition of the BRK generators to the Advanced Network Application system at SCC. Details of the required status and telemetry points are covered in the Project Interconnection Requirements. 6

8 4.1.4 Clowhom Substation Facilities Connection of the ground grid of COM to BRK via two size 9 ground wires acting as shield wires on the transmission tap to BRK Telecommunications Facilities A 4W circuit for DNP3.0 IED (SCADA) from Bear Creek to COM. The tone will interconnect at COM to LMC via BCH PLC and Microwave network. Installation of XXXX supplied FOTs equipment between BRK and COM Digital to analog conversion and DC power supply at COM to interface IPP equipment to powerline carrier Powerline carrier facilities between COM and GIB Note: the PLC wave trap at COM is to be connected to the SEC side of the BRK tap to 1L44, otherwise an additional trap must be provided by XXXX at BRK DACs equipment at LMC is required Field Co-ordination Provide Field Coordinator duties associated with the commissioning of BRK to the Transmission System in accordance with System Operating Order 1T-35. Refer to Section 13.1 of BCTC s 69 kv to 500 kv Interconnection Requirements for Power Generators" dated May Network Upgrade Facilities Transmission Line Upgrades to 1L44 Upgrade 1L44 COM to SCG and SCG to SEC to new summer ratings of 240 and 300 amps respectively Protection New primary and standby line protection at COM for 1L Control Add new telemetry for 1L44 and add BRK 52L status to RTU at COM. Add new line telemetry and status points to database and displays at LMC Telecommunications Provide dial-up facilities for SEL-203X via Globestar satellites services for line protection data access. 7

9 5.0 IMPLEMENTATION AND SCHEDULE If BCTC facilities work can proceed by 01 December 2005, BCTC will make reasonable efforts to complete the facilities and be ready for BRK synchronization by 30 September The implementation assumptions, which have been used in the schedule development, are the following: I. BCTC (and its contractors) would perform all work associated with the protection, control centre and telecommunications (excluding satellite) facilities. II. It is assumed that the 1L44 circuit will be de-energized during construction. XXXX is responsible to repay BC Hydro and other IPP(s) tapped on circuit 1L44 for any generation losses/costs incurred during construction. 6.0 COST ESTIMATES FOR FACILITIES All facilities identified for the connection have been categorized as Direct Assignment (DA) Facilities or Network Upgrade Facilities (NU). The following provides a breakdown of the costs. 6.1 Direct Assignments (DA) Facilities The costs for DA facilities, as described in Section 4.0, are summarized in the following table: Project Management $51K Study Work & Other Services $57K Transmission/Station Facilities $220K Protection Facilities $80K Control Centre Facilities $10K Telecommunications Facilities $490K Field Coordinator $11K Overhead $21K Subtotal $940K Contingency (6.6%) $60K DA Total $1,000K (+GST) 8

10 6.2 Network Upgrade (NU) Facilities Project Management $20K Study Work & Other Services $7.5K Transmission Facilities $303K Protection Facilities $83K Control Centre Facilities $17K Telecommunications Facilities $81.5K Overhead/IDC $18K subtotal $530K Contingency (6%) $30K NU Total $560K (+GST) 9

11 Appendix A Documentation The following drawings and notes are part of the project proposal submitted by XXXX. Subsequent revisions or new documents may supersede some of these documents. In such cases the latest issue is the governing document. The following table lists the data and other information from XXXX with respect to the Interconnection Facilities Study. 12 April 2005 Interconnection Impact Study and Facilities Study Agreement 1 March 2005 Generator Interconnection - Application 1 March 2005 ( dated Nov 2003) 1 March 2005 ( dated Nov 2003) Generator Equipment Statement ( GES) Transmission Entrance Equipment Statement (TEES) 13 May 2005 Supplement to the GES ( D. Marano to R. Hefflick regarding BRK G2 voltage) 7 July 2005 Supplement to the TEES ( D. Marano to G. Shtokalko regarding BRK transformer connections) 8 August 2005 Supplement to the GES ( D. Marano to R. Hefflick regarding BRK generator reactance data Rev 3 Nov. 30/04 Control Single One Line Diagram Figure 1 Rev A 2002 Figure 2 Rev A 2002 Substation Location Photo Sketch Substation Layout Preliminary Sketch 10