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ERCOT Monthly Operational Overview ( April 2012 ) May 15, 2012

ERCOT Monthly Operational Overview ( April 2012 ) May 15, 2012. Grid Operations & Planning. Content. Operations Peak Demand: Actual vs. Forecast On-line Resources: Total at Peak and Wind CPS1 Monthly Performance Historical Peak and Minimum Loads

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ERCOT Monthly Operational Overview ( April 2012 ) May 15, 2012

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  1. ERCOT Monthly Operational Overview (April 2012)May 15, 2012

  2. Grid Operations & Planning

  3. Content • Operations • Peak Demand: Actual vs. Forecast On-line Resources: Total at Peak and Wind • CPS1 Monthly Performance • Historical Peak and Minimum Loads • Day-Ahead Load Forecast Performance • Reliability Unit Commitment Capacity (RUC) by weather zone • Generic Transmission Limits (GTLs) • Advisories, Watches and EEAs • Significant System Incidents • Cooling Reservoir Level Update • Planning Activities • Summary • Generation Interconnection Requests • Wind Capacity ERCOT Public

  4. April 2012 Daily Peak Demand: Hourly Average Actual vs. Forecast, Wind Day-Ahead COPs & On-line Capacity at Peak Note: All data are hourly averages during the peak load hour obtained from COPs, and EMMS. ERCOT Public

  5. April 2012 Actual Wind Output plus Curtailments vs. Wind Day-Ahead COPs for All Hours % of Hours when Estimated Uncurtailed Wind Output >= COP HSLs (Target = 50%) 50% Note: QSEs must use the AWST 50% probability of exceedance forecast as the HSL in their COPs ERCOT Public

  6. April 2012 ERCOT’s CPS1 Monthly Performance CPS1 12 Month Rolling Average = 154.07% ERCOT Public

  7. April 2012 Monthly Peak Actual Demand ERCOT Public

  8. April 2012 Monthly Minimum Actual Demand ERCOT Public

  9. Day-Ahead Load Forecast Performance in April 2012 May 15, 2012 ERCOT Public

  10. Reliability Unit Commitment (RUC) Capacity by weather zone in April 2012 ERCOT Public

  11. April 2012 Generic Transmission Limits (GTLs) GTL: A transmission flow limit more constraining than a Transmission Element’s normal limit established to constrain flow between geographic areas of the ERCOT Transmission System that is used to enforce stability and voltage constraints that cannot be modeled directly in ERCOT’s transmission security analysis applications. Note: This table lists how many times a constraint has been activated to avoid exceeding a GTL limit, it does not imply an exceedance of the GTL occurred. May 15, 2012 ERCOT Public

  12. Advisories and Watches in April 2012 • Advisories issued for Physical Responsive Capability (PRC) below 3000 MW. • Issued 2 Days • Watches issued for Physical Responsive Capability (PRC) below 2500 MW. • 0 Watch issued for PRC below 2500 MW. • Transmission Watches • None • Energy Emergency Alerts • None ERCOT Public

  13. Lake Levels Update – 01May 2012 * In Feet above Mean Sea Level ERCOT Public

  14. Planning Summary – April 2012 • ERCOT is currently tracking 125 active generation interconnection requests totaling over 34,000 MW. This includes over 18,000 MW of wind generation. • ERCOT is currently reviewing proposed transmission improvements with a total cost of $81.5 Million • Transmission Projects endorsed in 2012 total $413 Million • All projects (in engineering, routing, licensing and construction) total approximately $9.84 Billion • Transmission Projects energized in 2012 total about $108.8 million ERCOT Public

  15. County Location of Planned Generation with Interconnection Requests (all fuels) April 2012 ERCOT Public

  16. County Location of Planned Generation with Interconnection Requests (Wind) April 2012 ERCOT Public

  17. Wind Generation – April 2012 ERCOT Public

  18. Generation Interconnection Activity by Fuel – April 2012 ERCOT Public

  19. Generation Interconnection Activity by Project Phase – April 2012 ERCOT Public

  20. Market Operations

  21. Day-Ahead Schedule – April 2012 ERCOT Public

  22. Day-Ahead Electricity And Ancillary Service Hourly Average Prices – April 2012 ERCOT Public

  23. Day-Ahead Vs Real-Time Load Zone SPP(Hourly Average) – April 2012 ERCOT Public

  24. Day-Ahead Vs Real-Time Hub Average SPP (Hourly Average) – April 2012 ERCOT Public

  25. DRUC Monthly Summary – April 2012 ERCOT Public

  26. HRUC Monthly Summary – April 2012 ERCOT Public

  27. Non-Spinning Reserve Service Deployment – April 2012 ERCOT Public

  28. CRR Price Convergence – April2012 ERCOT Public

  29. Reliability Services – April 2012 • RUC Cost continues to trend low. • April 2012 cost was $0.01M, compared to: • A charge of $0.01M in March 2012 • A charge of $2.4M in April 2011 ERCOT Public

  30. Ancillary Services – April 2012 • Capacity Services costs were increased from last month, but more comparable to April 2011. • April 2012 cost was $38.61M, compared to: • A charge of $25.6M in March 2012 • A charge of $31.3M in April 2011 ERCOT Public

  31. Energy Settlement – April 2012 Increases in Day-Aheadand Real-Time energy settlement increased from previous month; reflective of increased load and prices. ERCOT Public

  32. Congestion Revenue Rights (CRR) – April 2012 • Congestion Revenue Rights were fully funded. • Excess funds available for distribution to load. ERCOT Public

  33. Revenue Neutrality – April 2012 • Revenue Neutrality trending lower than previous months. • April 2012 was a credit of $1.16M, compared to: • $8.29M charge in March 2012 • $2.37M credit in April 2011 ERCOT Public

  34. Net Uplift to Load – April 2012 • Net uplift to load trending higher from the previous month; increases can be attributed to increases in Ancillary Services and other costs associated with increased load. • April 2012 was a charge of $19.36M, compared to: • $14.67M in March 2012 • $18.28M in March 2011 ERCOT Public

  35. Advanced Meter Settlement Impacts – April 2012 April 2012: At month end, settling just under 5M ESIIDs using Advanced Meter data. April 2012: 85.7% of the load in ERCOT is settled with 15-min interval data (AMS, Competitive IDR, and NOIE IDR). ERCOT Public

  36. ERCOT Wide Load Volumes by Meter Type – INITIAL Settlement – April 2012 ERCOT Public

  37. Retail Transaction Volumes – Summary – April 2012 ERCOT Public

  38. Retail Transaction Volumes – Summary – April 2012 Switches Move-Ins Move-Outs Mass Transition ERCOT Public

  39. Retail Performance Measures – Switch – April 2012 1st Quarter 2nd Quarter 3rd Quarter 4th Quarter ERCOT Public

  40. Retail Performance Measures (Priority Move-In) – April 2012 1st Quarter 2nd Quarter 3rd Quarter 4th Quarter ERCOT Public

  41. Retail Performance Measures (Standard Move-In) – April 2012 1st Quarter 2nd Quarter 3rd Quarter 4th Quarter ERCOT Public

  42. Projects Report

  43. ERCOT Portfolio Stoplight Report (as of 5/7/2012) ERCOT Public

  44. ERCOT Portfolio Stoplight Report (as of 5/7/2012) ERCOT Public

  45. ERCOT Portfolio Stoplight Report (as of 5/7/2012) ERCOT Public

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