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EMMS Release 4 Market Wrap-up

EMMS Release 4 Market Wrap-up. WMS January 18 th , 2006. Release 4 Market Wrap-up. R4 Market Components A/S Simultaneous Selection PRR 342 Replacement Reserve Service PRR 413/491 Resource Plan improvements PRR 359 Resource Specific Bid Limits PRR 485 OOM Enhancements PRR 422, 423

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EMMS Release 4 Market Wrap-up

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  1. EMMS Release 4 Market Wrap-up WMS January 18th, 2006 Brandon Whittle, ERCOT

  2. Release 4 Market Wrap-up • R4 Market Components • A/S Simultaneous Selection PRR 342 • Replacement Reserve Service PRR 413/491 • Resource Plan improvements PRR 359 • Resource Specific Bid Limits PRR 485 • OOM Enhancements PRR 422, 423 • Modification of Ancillary Services Allocation Brandon Whittle, ERCOT

  3. EMMS Release 4 Market Wrap-up • Simultaneous Selection of Ancillary Services • Replacement Reserve Service Brandon Whittle, ERCOT

  4. Simultaneous Selection of Ancillary Services • Original Savings Estimate • Observed Results Brandon Whittle, ERCOT

  5. Simultaneous Selection of Ancillary Services • Original Savings Estimate Production Cost = Offer price multiplied by MW Cleared Cost to Market = MCPC multiplied by MW Cleared Expected Savings assumes 1 year of identical results Brandon Whittle, ERCOT

  6. Simultaneous Selection of Ancillary Services • Observed Results Production Cost = Offer price multiplied by MW Cleared Cost to Market = MCPC multiplied by MW Cleared Expected Savings assumes 1 year of identical results Brandon Whittle, ERCOT

  7. Simultaneous Selection of Ancillary Services • Observed Results – MCPC Brandon Whittle, ERCOT

  8. Replacement Reserve Service • Status • Current Activities • Remaining Challenges • Observations from Testing • Transmittal of Test Data • No-Earlier-Than Date Brandon Whittle, ERCOT

  9. Replacement Reserve Service • Status • Final Stages of Testing • RPRS Market Clearing Engine (MCE) and Simultaneous Feasibility Test (SFT) • January 4th, 2006 Patch Installed • Vital Functions Operational • Additional Patch Expected Brandon Whittle, ERCOT

  10. Replacement Reserve Service • Current Activities • Daily Verification of Results • Comparison between OOMC and RPRS • For each difference, an explanation • MCPC Verification • Correct • Unstructured Testing • Evaluate RPRS unit selection, dispatch • Everything has been as expected Brandon Whittle, ERCOT

  11. Replacement Reserve Service • Remaining Challenges • Network Model Inconsistencies • Normal Breaker Status (ETA 1/20/06) • LaaR Modeling (ETA 2/28/06) • SFT Patch (ETA 2/15/06) • Visibility in SFT Brandon Whittle, ERCOT

  12. Replacement Reserve Service • Observations from Testing • OOMC and RPRS Comparison • Generally more efficient set of resources • MCPC Verification – All Good • Use of Base Load Generation • Solves local constraints by reducing before buying Brandon Whittle, ERCOT

  13. Replacement Reserve Service • Transmittal of Test Data • Must wait until results are accurate • Market Clearing Price for Capacity • MW Procured for each step Brandon Whittle, ERCOT

  14. Replacement Reserve Service • No-Earlier-Than Date • March 15th, 2006 • Assumptions • Network Model is correct • LaaR Modeling solution is implemented • Results are satisfactory Brandon Whittle, ERCOT

  15. EMMS Release 4 Market Wrap-up Questions? Brandon Whittle, ERCOT

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