TSR A & B - FACILITIES STUDY REPORT

Transcription

1 TSR A & B - FACILITIES STUDY REPORT Transmission Service Request No. TSR A&B 2 x 25 MW Wind Energy Generating Facilities From POI on Gladstone Walsenburg 230 kv Line to Ojo Substation 345 kv bus FINAL Prepared by HDR Engineering, Inc. Reviewed by Ray LaPanse, Irene Mulyar, Steve Anderson, Bryan Nordin DISCLAIMER OF WARRANTIES AND LIMITATION OF LIABILITIES THIS DOCUMENT WAS PREPARED BY TRI-STATE GENERATION AND TRANSMISSION ASSOCIATION, INC., IN ITS CAPACITY AS TRANSMISSION PROVIDER (TP), IN RESPONSE TO A GENERATOR INTERCONNECTION REQUEST. NEITHER TP, NOR ANY PERSON ACTING ON BEHALF OF TP: (A) MAKES ANY REPRESENTATION OR WARRANTY EXPRESS OR IMPLIED, WITH RESPECT TO THE USE OF ANY INFORMATION, METHOD, PROCESS, CONCLUSION, OR RESULT, INCLUDING FITNESS FOR A PARTICULAR PURPOSE; OR (B) ASSUMES RESPONSIBILITY FOR ANY DAMAGES OR OTHER LIABILITY, INCLUDING ANY CONSEQUENTIAL DAMAGES, RESULTING FROM USE OF THIS DOCUMENT OR ANY INFORMATION CONTAINED HEREIN. TSR AB FacS Report_HDR-RAL-Final_ DOCX Page 1 of 7

2 TABLE OF CONTENTS 1. BACKGROUND 2. INTERCONNECTION OF THE GENERATING FACILITY 2.1. Scope of Work 2.2. Cost Estimates and Assumptions 3. SCHEDULE 4. LIST OF APPENDICES TO BE SUPPLIED TO IC ONLY (NOT FOR OASIS POSTING) Drawings: Appendix A-1: Springer Substation Shielding, Fence, Grading and Property Map S3076- A Appendix A-2: Springer Substation Single Line Relaying and Metering S3076-B Appendix B-1: Gladstone Substation General Arrangement Option #1 S3034-A Appendix B-2: Gladstone Substation AC One Line Diagram Option #1 S3034-B1-002 Appendix C-1: Steel Single Pole Deadend Structures #1 & #2 STR. #1 & #2 Appendix C-2: Steel 3-Pole Deadend Structure #271,272 STR. #271,272 Appendix C-3: Tangent H-Frame TH-10X TH-10X,XX Appendix C-4: Large Angle Double Deadend TH-15 TH-15 Appendix C-5: Tangent Double Deadend TH-15D TH-15D Appendix C-6: Plan and Profile PP-1 Thru PP-32 Appendix C-7: Transmission Line Route Map Cost Estimates: Appendix D: Appendix E: Appendix F: Appendix G: Schedule: Appendix H: Springer Substation Network Upgrades Cost Estimate Summary Gladstone Substation Network Upgrades Cost Estimate Summary Gladstone Springer 115 kv Line Network Upgrades Cost Estimate Summary Siting, Land & Environmental Cost Estimate Summary Construction Schedule Subs, Line & Siting-Permitting TSR AB FacS Report_HDR-RAL-Final_ DOCX Page 2 of 7

3 1. BACKGROUND This Facilities Study (FacS) report sets forth the scope of work, +/- 20% cost estimate, and schedule for the Network Upgrades required by the Transmission Provider (TP, Tri-State) to deliver the energy associated with an Interconnection Customer s (IC) Transmission Service Request (TSR) for point-to-point transmission service for two 25 MW (50 MW total) requests, TSR A&B. The TSR path is from the Point of Interconnection (POI) of the IC s proposed wind generation project at a new TP POI Interconnection Switching Station located approximately 20 miles north of Gladstone Substation on the Gladstone Walsenburg 230 kv line (Point of Receipt), to the Ojo Substation 345 kv bus (Point of Delivery). The System Impact Study (SIS) for this TSR was completed and a final SIS report was issued on 9/29/2011. Furthermore, the IC formerly had a Generator Interconnection Request Application in Tri-State s GIR queue (GIR #TI , 100 MW) at this POI, but this application was withdrawn by the IC 9/3/2010. This IC subsequently submitted another application in Tri-State s GIR queue (GIR #TI , 75 MW total) at this same POI, and the SIS for this GIR is in progress. Adequacy of the contemplated transmission service arrangement is contingent on the completion of the installation of a new Tri-State planned 230 kv Phase Shifting Transformer (PST) at Gladstone, with a scheduled ISD by the end of This PST will be coordinated with operation of the WECC Loop Flow Limiting PSTs, and control the power flow south from Colorado into NE NM, and west across NM including the 230 kv (near Gladstone) POI west to Ojo 345 kv applicable for this TSR study. Any Transmission Service Agreement would need to make transfer of power from the proposed interconnection point, contingent upon availability of Phase Shifting capability. 2. INTERCONNECTION OF THE GENERATING FACILITY 2.1 Scope of Work The documents in support of this TSR include: electrical one-line diagrams, general arrangement drawings, transmission line structure drawings, transmission line plan and profile drawings, transmission line route map, major material lists with cost estimates, and project schedule. The TP Network Upgrades include: a new second 32-mile, 115 kv Gladstone to Springer transmission line assumed to be constructed in parallel with (along same corridor); acquisition of additional / new 100-ft. wide ROW easements, associated permits, etc.; and construction of new 115 kv line terminations and necessary modifications required at the existing Gladstone and Springer 115kV substations. At the Springer Substation these modifications include: TSR AB FacS Report_HDR-RAL-Final_ DOCX Page 3 of 7

4 Relocation of the 115 kv York Canyon to Springer line into a new line position entering Springer Substation from the west. Termination of new 115 kv Springer to Gladstone line into a new line position entering Springer Substation from the east. Relocation of capacitor bank, circuit switcher and disconnect switch from south east side of substation to north-west side of substation. Relocation of 115 kv CCVT s and CT s for the existing Springer to Gladstone line. Addition of three dead-end structures, four 115 kv disconnect switches, five 115 kv CCVT s, three 115 kv (145 kv class) Circuit Breakers, three 115 kv line entrance surge arresters, associated foundations and steel, breaker and line control panels, RTU/SCADA equipment, cable and hard bus, conduit and cabling, grounding, static protection equipment, and associated connectors and hardware. At the Gladstone Substation these modifications include: Termination of new 115 kv Springer to Gladstone line into new position entering substation from the east. Addition of one dead-end structure, three 115 kv disconnect switches, three 115 kv CCVT s, one 115 kv Circuit Breaker (145 kv class), three line entrance surge arresters, associated foundations and steel, breaker and line control panels, RTU/SCADA equipment, cable and hard bus, conduit and cabling, grounding, static protection equipment, and associated connectors and hardware. Construct a new second 32-mile, 115 kv transmission line From the Springer Substation to the Gladstone Substation. 2.2 Cost Estimates and Assumptions: The layout of the proposed line termination is shown on the attached One-Line Diagrams and General Arrangements Springer Substation Network Upgrades to be completed and owned by the Transmission Provider and initially paid for by Interconnection Customer Install three 115 kv Deadends Install three 115kV Circuit Breakers (145 kv class, 1200A / 40 ka) Install four 115 kv Switches (1200A) Install five 115 kv CCVT s Install three 96 kv Arresters Remove and Reinstall three 115 kv CT s Remove and Reinstall one Cap Bank Remove and Reinstall one Circuit Switcher Remove and Reinstall one 115 kv Switch Remove and Reinstall three 115 kv CCVT s TSR AB FacS Report_HDR-RAL-Final_ DOCX Page 4 of 7

5 Install all other necessary substation equipment including but not limited to grounding conductor, cable, conduit, foundations, support steel, yard surface, static protection, tubular and cable bus, RTU/SCADA Equipment, Relaying Panels, The estimated cost for the Springer Substation Transmission Provider s Network Upgrades is $ Million; see Appendix D Gladstone Substation Network Upgrades to be completed and owned by the Transmission Provider and initially paid for by Interconnection Customer Install one 115 kv Deadend. Install one 115 kv Circuit Breaker (145 kv class, 1200A / 40 ka). Install three 115 kv Switches (1200A). Install three 115 kv CCVT s. Install three 96 kv Arresters. Expand or modify as required all other necessary substation equipment including but not limited to grounding conductor, cable, conduit, foundations, support steel, yard surface, static protection and tubular and cable bus, RTU/SCADA Equipment, and Relaying Panels. The estimated cost for the Gladstone Substation Transmission Provider s Network Upgrades is $ Million; see Appendix E Gladstone to Springer 115kV Transmission Line (Circuit #2, est. 32 miles) Network Upgrades to be completed and owned by the Transmission Provider and initially paid for by Interconnection Customer. Transmission line design per Tri-State standard 115 kv line design: structures (wood-pole H-frame construction), insulators, hardware, conductor (795kcmil ACSR Drake, 100 deg. C conductor temp. sag), approx A / 239 MVA continuous thermal line rating, with fiber optic static wire (OPGW). ROW Easements (100-ft. ROW width), siting & permitting activities, etc., associated with new 32-mile, 115kV Gladstone Springer line. The estimated cost for the Gladstone Springer 115 kv Transmission Line (Ckt. #2) Transmission Provider s Network Upgrades is $ Million. This includes $7.888 Million for design and construction activities (see Appendix F), plus $0.215 Million for Land Rights, Siting, Permitting and Environmental activities required for the new line (see Appendix G for cost summary and list of key assumptions). 3. SCHEDULE A detailed schedule for the siting / permitting, engineering and construction of the new Gladstone to Springer 115 kv transmission line #2 and associated substation work is attached TSR AB FacS Report_HDR-RAL-Final_ DOCX Page 5 of 7

6 as Appendix H. The schedule starts with the receipt of funds and execution of an E&P agreement to be followed by a timely execution of the GIA, or with the receipt of funds and execution of a GIA. The total estimated duration from the receipt of funds until the project is placed in service is approximately 44 months. This time line assumes that the first 27 months is required for the Land Rights, Siting, Permitting and Environmental activities, and the last 17 months is required for the design, material procurement, and construction activities for the transmission line and substations. This schedule is based upon several major assumptions particularly with respect to the new 115 kv transmission line routing being able to be completed along the same corridor used for the existing 115 kv Gladstone to Springer line (Ckt. #1), and there being minimal permitting, environmental, and NM Public Regulations Commission approvals required. See Appendix G for a listing of the assumptions made in this regard as it pertains to the Land rights, Siting, Permitting and Environmental activities that could become a major gating factor regarding the overall schedule and potentially costs of this project. Should the line route be required to change, then the cost and schedule estimates described in this FacS report would be significantly different (higher & longer). TSR AB FacS Report_HDR-RAL-Final_ DOCX Page 6 of 7

7 5. LIST OF APPENIDICES TSR A&B FacS Report - Final Drawings: Appendix A-1: Springer Substation Shielding, Fence, Grading and Property Map S3076-A Appendix A-2: Springer Substation Single Line Relaying and Metering S3076-B Appendix B-1: Gladstone Substation General Arrangement Option #1 S3034-A Appendix B-2: Gladstone Substation AC One Line Diagram Option #1 S3034-B1-002 Appendix C-1: Steel Single Pole Deadend Structures #1 & #2 STR. #1 & #2 Appendix C-2: Steel 3-Pole Deadend Structure #271,272 STR. #271,272 Appendix C-3: Tangent H-Frame TH-10X TH-10X,XX Appendix C-4: Large Angle Double Deadend TH-15 TH-15 Appendix C-5: Tangent Double Deadend TH-15D TH-15D Appendix C-6: Plan and Profile PP-1 Thru PP-32 Appendix C-7: Transmission Line Route Map Cost Estimates: Appendix D: Appendix E: Appendix F: Appendix G: Schedule: Appendix H: Springer Substation Network Upgrades Cost Estimate Summary Gladstone Substation Network Upgrades Cost Estimate Summary Gladstone Springer 115 kv Line Network Upgrades Cost Estimate Summary Siting, Land & Environmental Cost Estimate Summary Construction Schedule Subs, Line & Siting-Permitting TSR AB FacS Report_HDR-RAL-Final_ DOCX Page 7 of 7