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EMMS Release 4 Market Wrap-up

This report summarizes the ERCOT EMMS Release 4 market updates as of January 18, 2006, led by Brandon Whittle. It highlights key components including simultaneous selection of ancillary services, replacement reserve service progress, and resource plan improvements. The report outlines expected savings, observed results in production costs, and current challenges in the Replacement Reserve Service testing phase. Anticipated patches and statuses are addressed, focusing on efficiency and accuracy in market clearing processes.

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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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