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WMIC RTO Seams Task Force – Congestion Management

WMIC RTO Seams Task Force – Congestion Management. Wally Gibson Northwest Power Planning Council CREPC – Seattle, Washington November 1, 2001. Task. Examine the seams interactions of congestion management approaches of three western RTOs Perspective: single west-wide market

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WMIC RTO Seams Task Force – Congestion Management

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  1. WMIC RTO Seams Task Force – Congestion Management Wally Gibson Northwest Power Planning Council CREPC – Seattle, Washington November 1, 2001

  2. Task • Examine the seams interactions of congestion management approaches of three western RTOs • Perspective: single west-wide market • Describe the results and implications, report back to RTOs for further action • Not intended as inter-RTO negotiating forum

  3. Current Status • First public working draft of report – September 24 • Uncertainty immediately following: • DSTAR to WestConnect transition • RTO West decision to look in depth at alternative approach before making final decisions • Further work on paper postponed till matters sort out enough to work through the seams implications • Preliminary implications in paper, but likely to be different with different approach in RTO West • WestConnect mostly unchanged from DSTAR

  4. Examples Examined • Example transactions: • McNary to Phoenix • Phoenix to Northern California • Several time frames: • Forward market, forward market with curtailment, real time • Picked to involve • Major loop flow • Different congestion approaches in originating RTOs • Direct path either passing or not passing through third RTO • Implications for phase shifter operation

  5. 100 McNary to Phoenix 100 72 7 1 3 13 4 77 100

  6. 100 Phoenix to N. California 16 4 2 100 3 9 2 84 100

  7. Assumptions and Scenarios • Congestion management approach • DSTAR/WestConnect - contract path physical rights • RTOW - flow-based physical rights (likely to change) • CAISO - injections-withdrawals, adjustment bids, hybrid FTRs • Commercial representation of power flow on grid • Open loop – Flow-based within individual RTO only • Closed loop – Flow-based across entire western grid • Contract path – Not flow-based • Not address DC Intertie

  8. Issues Raised so Far • Some combinations lead to phantom congestion day ahead and unused capacity in real time • Choice of open- or closed-loop grid representations can affect ability to use phase shifters as forward market tools instead of using them to fix real-time loop flow problems • Generator redispatch bidding across RTO boundaries needs to be addressed • Security issues need to be highlighted in next round of paper • Paper posted at www.wrta.net/seamsmeeting.htm (September 24 meeting materials #1)

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