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0-LSL Impacts of RUC and Offline Non-Spin on 2011

Analysis of the effect of LSL energy from OFFNS/RUC on the grid, including changes in lambda, PNM, make-whole payments, and additional cost. Case studies and summaries provided.

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0-LSL Impacts of RUC and Offline Non-Spin on 2011

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  1. 0-LSL Impacts of RUC and Offline Non-Spin on 2011 Resmi Surendran QMWG

  2. 0 – LSL Analysis Approach Determine the effect of LSL energy from OFFNS/ RUC when BP=LSL • Extent EOC to 0, relax LDL to 0 and rerun SCED clearing engine to get new lambda • Additional PNM for each SCED interval is estimated as • If original pnm = 0 then addition =max(0, new lambda-10*FIP)* time else if original pnm > 0 then addition = max(0, increase in lambda)* time • Make-whole payment needed is estimated as • ½ (new lambda – old lambda) * sum of relaxed LSL * time • Additional increase in cost is estimated as • (new lambda – old lambda) * total generation * time ERCOT Public

  3. 0 – LSL Studies • QSGR • Case study of March 2nd • OFFNS/ ONRUC • From Dec 1st 2010 to Jan 31st 2012 • For the OFFNS units with BP=LSL, apply the 180 floor to the unit EOC from 0 to HSL • For the ONRUC units with BP=LSL, apply the SWCAP floor to the unit EOC From 0 to HSL ERCOT Public

  4. Effect of Quick Start Resources Dispatch on March 2nd, 2012 • 0-LSL deployment from QSGR • 2756.9 MWh • Minimum 3 MW, Average 266.8 MW, Maximum 430 MW • Approach • Extended EOC to 0MW, set LDL to 0 for QSGRs dispatched by SCED at LSL and then reran SCED clearing engine • Results • Average system lambda increase is $80.5 • PNM addition is estimated to be $830 (FIP was 2.355) • Make whole payment is estimated to be 151k • Estimated additional increase in cost is 380k ERCOT Public

  5. 0 – LSL OFFNS/ ONRUC MW ERCOT Public

  6. 0- LSL OFFNS/ ONRUC Effective MW ERCOT Public

  7. Monthly Summary of 0-LSL for OFFNS/ONRUC ERCOT Public

  8. Summary of 0-LSL for OFFNS/ONRUC (Excluding Feb 2011) ERCOT Public

  9. Summary of 0-LSL for OFFNS/ONRUC (Dec 2010 – Jan 2012) ERCOT Public

  10. PNM Change for OFFNS/ONRUC (Dec 2010 – Jan 2012) ERCOT Public

  11. Monthly Estimated Impact for OFFNS/ONRUC (Excluding Feb 2011) ERCOT Public

  12. Percentiles of Estimated Impact for OFFNS/ONRUC (Excluding Feb 2011) ERCOT Public

  13. Appendix ERCOT Public

  14. PNM Change for OFFNS/ONRUC (Excluding Feb 2011) ERCOT Public

  15. Monthly Estimated Impact for OFFNS/ONRUC (Dec 2010 – Jan 2012) ERCOT Public

  16. Percentiles of Estimated Impact for OFFNS/ONRUC (Dec 2010 – Jan 2012) ERCOT Public

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