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WMS Update

WMS Update. Relaxed Resource Schedule Credit Requirements PRR-404. Relaxed Resource Schedule . Credit Requirements Incremental Collateral Calculation Price Volume Weekly True-Up Resource and Load Imbalance Collateral Posting . Incremental Collateral Calculation.

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WMS Update

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  1. WMS Update Relaxed Resource Schedule Credit Requirements PRR-404

  2. Relaxed Resource Schedule Credit Requirements • Incremental Collateral Calculation • Price • Volume • Weekly True-Up • Resource and Load Imbalance • Collateral Posting

  3. Incremental Collateral Calculation For Resource Only QSEs For any un-invoiced trade weeks that a QSE’s estimated resource mwhs deviation exceeds Expected Generation mwhs by 20%, ERCOT will calculate an incremental collateral requirement as follows: (Estimated Resource MWhs Deviation x Estimated Price unbilled ) – Collateral Held for Resource Imbalance ERCOT Estimated Resource Deviation (for the previous seven-day period) = Scheduled Generation – Preliminary Actual Generation + Scheduled ERCOT Market Resource Purchased

  4. Price Price will be calculated for: • The weeks of activity that have occurred but have not been billed (currently approximately three weeks) • One forward week (to capture volatility)

  5. Price Price for Unbilled Weeks • The seven day average or the higher of • a) The BE Up and • b) The BE Down daily weighted average BES MCPE Daily prices found on the ERCOT website (transparent) • Price for the Forward Week • Price will be calculated as 150% of the most recent seven (7) day weighted average BES MCPE

  6. Volume Volume will be calculated as the higher of: • ERCOT’s estimate of the QSE’s previous seven day average estimated resource deviation or • The QSE’s estimated average forecast of resource deviation for the next seven day period

  7. Volume • The ERCOT estimated resource deviation for the previous seven-day period is calculated as: (Scheduled Generation – Preliminary Actual Generation + ScheduledERCOT MarketResourcePurchased)

  8. Daily Monitoring and Weekly True-Up • ERCOT will monitor daily and calculate weekly an incremental Resource Imbalance liability. • Each week, ERCOT will apply the seven-day period’s updated estimated resource deviation and weighted average MCP and increase or reduce the QSE’s amount of incremental collateral posted.

  9. Resource and Load Imbalance • Collateral requirements for Resource and Load Imbalance: • If the sum of • 1. The percentage by which a QSE’s total estimated Load MWHs differs from its scheduled Load MWHs and • 2. The percentage by which a QSE’s total estimated Resource MWHs differs from its scheduled Resource MWHs • exceed 20%,

  10. Resource and Load Imbalance • ERCOT will monitor daily and calculate weekly an incremental net Resource and Load Imbalance liability.

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