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Reliability Redispatch Pilot Presentation for NIPPC June 13, 2007

Reliability Redispatch Pilot Presentation for NIPPC June 13, 2007. Term of Pilot 6/26/07 through 9/30/07. Project Status. Software Development complete Hardware environments configured and operational Dispatch and scheduling procedure changes documented

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Reliability Redispatch Pilot Presentation for NIPPC June 13, 2007

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  1. Reliability Redispatch Pilot Presentation for NIPPCJune 13, 2007 Term of Pilot 6/26/07 through 9/30/07

  2. Project Status • Software Development complete • Hardware environments configured and operational • Dispatch and scheduling procedure changes documented • Dispatch, scheduling and bidder training underway • Pilot agreement nearing completion

  3. Bid Tool Overview • Redispatch Bid Content • Generator • Day and Hour ending • Quantity (MW) available within 10 min. • Price per MWh • Increase (INC) and/or Decrease (DEC)

  4. Bid Validation Rules Bid Data • INC Only Bid • DEC Only Bid • INC and DEC Bid • Neither – Zero Bid • INC Bid includes INC MW & INC Price • DEC Bid includes DEC MW & DEC Price

  5. Bid Validation Rules Megawatts • Whole # > Zero • Not exceeding Generator’s established Maximum INC/DEC MW amount. • Not less than Generator’s established Minimum INC/DEC MW amount.

  6. Bid Validation Rules Price • Positive U.S. currency value per MWh • Not exceeding established Maximum INC/DEC Bid Price Limit. ($400) • Not less than established Minimum INC/DEC Bid Price Limit. ($0)

  7. Submitting a Bid • Submitted or changed up to 20 minutes prior to flow hour. • No further into the future than 5 days. (Day +5)

  8. Bid Tool Demonstration

  9. Calculate Redispatch Background

  10. Simplified RRP Map

  11. Introduction • A generator’s impact on a flowgate is measured by its Power Transfer Distribution Factor or PTDF. • PTDF is also known as Path Utilization Factor (PUF) and Transmission Loading Relief (TLR).

  12. Introduction cont. • The PTDF is the ratio impact to the loading on a specific flowgate based on an increase (INC) at the generator and a like decrease (DEC) at a reference bus (Grand Coulee for our studies). • A positive PTDF will increase the loading. • A negative PTDF will decrease the loading and provide relief.

  13. Flowgates and PTDFs/PUFs Reference Bus PUFs are zero Flowgates

  14. Redispatch • To relieve the loading on the path, we find the pairs of generators that will provide relief. • We look for combinations of INC generator and DEC generators with a combined PTDF that is negative. • The combined PTDF is the INC PTDF – DEC PTDF. • Numbers closer to -1.0 are more effective. + -

  15. Single Redispatch Pair JDA-CNT Redispatch: 35 MW Impact: 35*-0.508= -17.8 MW

  16. Redispatch Solution • To get more relief, redispatch more pairs of generators. • Since a single generator could be involved in multiple pairs, the amounts are summed and each generator is called once.

  17. Calculate Redispatch 35-MW Paul-Allston Example

  18. 35-MW Paul-Allston Example

  19. 35-MW Paul-Allston Example

  20. 35-MW Paul-Allston Example

  21. 35-MW Paul-Allston Example

  22. 35-MW Paul-Allston Example

  23. 35-MW Paul-Allston Example

  24. 35-MW Paul-Allston Example

  25. 35-MW Paul-Allston Example

  26. 35-MW Paul-Allston Example

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