BPA Network Open Season 2013 Cluster Study

Transcription

1 BPA Network Open Season 2013 Cluster Study ColumbiaGrid Planning Meeting December 5, 2013

2 Topics for Discussion Cluster Study TSR Overview 2013 Cluster Study Areas Incremental ATC Needed Transmission Expansion Considered Northern Intertie/South of Custer Raver-Paul Paul-Allston/South of Allston North of Hanford West of Slatt/West of John Day Cluster Study Areas Not Needing Studies Next Steps 2013 NOS Cluster Study Public Outreach Slide 2

3 Cluster Study TSR Overview 7,820 MW of TSRs were considered for the 2013 Cluster Study: 1,855 MW either failed the eligibility requirements (405 MW) or did not pass the Data Exhibit validation (1,450 MW) and therefore were not offered a Cluster Study Agreement (CSA) BPA tendered 21 CSAs (1 per customer) for 5,965 MW Customers elected not to proceed with 2,492 MW BPA received 18 executed and funded CSAs for 3,473 MW. 18 Customers, 48 TSRs 834 MW of NT (19 TSRs) 2,101 MW of Original PTP (21 TSRs) 538 MW of Redirected PTP (8 TSRs) 2 PTSAs for 200 MW associated with Redirect 1 TSN for 500 MW associated with SILS Asset Exchange 1,547 MW associated with TSRs and PTSAs not modeled in ATC powerflow basecases Generation already on in ATC cases (NT, Mid-C, Redirect and Redundant TSR) Slide 3

4 2013 Cluster Study Areas Raver to Paul Paul to Allston South of Allston Puget Sound/ Northern Intertie 7 TSR s ~700 MW I-5 Project 21 TSR s ~2,300 MW West of John Day North of Hanford North of John Day West of Slatt Central Oregon 3 TSR s ~100 MW South of Custer North of Hanford North of John Day 11 TSR s/tsn ~1,400 MW West of McNary West of Slatt 12 TSR s ~500 MW West of Garrison West of Hatwai 4 TSR s ~200 MW Slide 4

5 Incremental TTC Needed 2013 LTF TTC (MW) Target 2013 NOS TTC (MW) Expected 2013 NOS TTC (MW) Path Northern Intertie 2,000 2,850 2,850 South of Custer 1,800 2,200 2,200+ Raver-Paul 1,450 1,550 1,590-1,760 Paul-Allston 2,250 2,400 2,700+ South of Allston 2,935 4,000 4,000+ North of Hanford 4,400 4,400 4,800 4,450 West of Slatt 4,100 4,700 4,760 West of John Day 3,750 3,850 4,060 Slide 5

6 Northern Intertie - Westside South of Custer Critical Season/Condition: Peak summer load combined with low Northern Whatcom Co. generation; OR shoulder, off-peak load conditions with high Northern Whatcom county generation Critical Contingency: N-2 Custer-Bellingham 230kV/Custer-Murray 230kV (common tower) N-1 Monroe-Echo Lake 500kV Limiting Element/Condition: Portal Way 230/115kV Transformer/Thermal Monroe-Novelty 230kV/Thermal Transmission Expansion Alternatives Considered: Option 1: Portal Way 230/115kV No. 2 Transformer plus resag Monroe-Novelty 230kV Option 2: Second 230/115kV Transformer in the area between Custer and PSE Bellingham plus resag Monroe- Novelty 230kV Transmission Expansion Needed: Option 1 (plus reconductor Portal Way-Lynden 115kV) OR Option 2 Resag Monroe-Novelty 230kV to 80 Deg C. TTC Increase (MW) North to South: NI: 2,850 / SOC: 2,200+ Slide 6

7 Raver-Paul Critical Season/Condition: Peak spring (late)-early summer load combined with high Northern Intertie transfers Critical Contingency: Breaker Failure at Paul (Raver-Paul 500kV and Centralia G2) Limiting Element/Condition: PSE Alderton-Fairchild 115kV/Thermal Transmission Expansion Alternatives Considered: Option 1: Eliminate Paul 500kV Breaker Failure Option 2: Rebuild South Tacoma-Olympia 230kV line to 1750 A Transmission Expansion Needed: Without PSE Woodland-Gravelly 115kV and reconfiguration at Gravelly Lake None Raver-Paul TTC = 1590MW (due to WECC WRS1.1 criteria change and optimized Westside RAS) With PSE Woodland-Gravelly 115kV and reconfiguration at Gravelly Lake - Resag PSE Alderton- Fairchild 115kV to 70 Deg C. TTC Increase (MW) North to South: R-P: 1,590 (Do Nothing) or 1,760 with Alderton- Fairchild 115kV resag to 70 Deg C. Slide 7

8 Paul-Allston / South of Allston Critical Season/Condition: Peak summer load combined with high north to south transfers from Canada through the Northwest to California Critical Contingency: P-A: N-2: Paul-Allston #2 500kV/Napavine-Allston 500kV with RAS SOA: N-2: Breaker Failure (Allston-Keeler 500kV/Keeler-Pearl 500kV) and N-1Allston-Keeler 500kV with reduced RAS Limiting Element/Condition: P-A: Chehalis-Longview Tap-Longview 230kV / Holcomb-Naselle 115kV/Thermal SOA: Trojan-Rivergate 230kV/Thermal Transmission Expansion Alternatives Considered: I-5 Corridor Reinforcement Project Transmission Expansion Needed: I-5 Corridor Reinforcement Project TTC Increase (MW) North to South: P-A: 2,700+ / SOA: 4,000+ Slide 8

9 North of Hanford Critical Season/Condition: Peak summer load combined with high north to south transfers from Canada through the Northwest to California Critical Contingency: N-2 Schultz-Wautoma 500kV/Schultz-Vantage 500kV (common ROW) Limiting Element/Condition: Columbia-Vantage 230kV/Thermal Transmission Expansion Alternatives Considered: Option 1: Reconductor Columbia-Vantage 230kV to 1520A Option 2: Add series compensation to Coulee-Hanford 500kV Transmission Expansion Needed: None - Transmission Expansion is not necessary if additional NOH ATC Methodology Margin is eliminated TTC Increase (MW) North to South: NOH TTC of 4,450MW with Joint Northern Mid-C Project will be sufficient. Slide 9

10 West of Slatt / West of John Day Critical Season/Condition: Summer peak load with high east to west flows from McNary to COI/PDCI and the Portland-Willamette Valley load service area Critical Contingency: WOS: N-2: Ashe-Marion 500kV/Slatt-Buckley 500kV WOJ: N-2: John Day-Big Eddy No.2 500kV/John Day-Marion 500kV Limiting Element/Condition: WOS: Slatt-John Day 500kV/Thermal WOJ: John Day-Big Eddy No.1 500kV/Thermal Transmission Expansion Alternatives Considered: WOS: Develop Sandpiper 500kV Substation (loop in Ashe-Slatt 500kV/Ashe-Marion 500kV and McNary-John Day 500kV). Also, included looping into Slatt for Ashe-Marion alternatives. WOJ: Nothing in addition to Big Eddy-Knight Transmission Expansion Needed: WOS: Nothing beyond Big Eddy-Knight - Transmission expansion is not necessary since WOS TTC was determined to be 4,760MW (reliability limit) with Big Eddy-Knight WOJ: Nothing beyond Big Eddy-Knight - Transmission expansion is not necessary since WOJ TTC was determined to be 4,060MW with Big Eddy-Knight TTC Increase (MW) East to West: WOS: 4,760 / WOJ: 4,060 Slide 10

11 Cluster Study Areas Not Needing Studies West of Garrison/West of Hatwai Assume Montana to Northwest (M2W) Project in-service 2010 NOS Cluster Study identified Garrison to Ashe (GASH) as next transmission expansion after M2W No new studies needed no feasible transmission expansion between M2W and GASH Central Oregon Ponderosa 500/230kV No.2 transformer energized December NOS Cluster Study did not identify additional transmission expansion beyond Ponderosa 500/230kV No. 2 transformer addition No new studies needed Slide 11

12 Next Steps Complete Cluster Study Identify Transmission Expansion Requirements Complete Cost Estimate and Schedule Submit Plans of Service, Cost Estimate and Schedule by December 31 st Start Phase 2 Preliminary Economic Analysis Draft 2013 NOS Cluster Study Report Continue Transient Stability Analysis: Simultaneous Interaction: NI: 2,850 / COI:4,800 Evaluate impact of composite load model Slide 12

13 2013 NOS Cluster Study Public Outreach May 2, 2013: ColumbiaGrid Planning Meeting June 6, 2013: ColumbiaGrid Planning Meeting August 1, 2013: ColumbiaGrid Planning Meeting September 19, 2013: BPA Customer/Stakeholder Meeting October 17, 2013: ColumbiaGrid Planning Meeting November 18, 2013: BPA Customer/Stakeholder Meeting December 5, 2013: ColumbiaGrid Planning Meeting December TBD, 2013: BPA Customer/Stakeholder Conference Call December 31: Conclude 2013 NOS Cluster Study Slide 13