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ISO-NE Reserve Adequacy

ISO-NE Reserve Adequacy. Bridge between the DA and RT Markets

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ISO-NE Reserve Adequacy

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  1. ISO-NE Reserve Adequacy • Bridge between the DA and RT Markets • Objective – Determine the Current Operating Plan for the Real-time Market to reliably serve the hourly energy and reserve requirements of the NEPOOL Control Area and to minimize the cost to provide additional Operating Reserve above what was scheduled in the Day –Ahead Energy Market, if required.

  2. Market Timeline • 1200 Trading deadline for the Day Ahead Market and for Real-time External Transactions to be used in RA process • Day Ahead Market results posted at 1600 • Re-Offer Period (1600 - 1800) Participant are permitted to: • Generators not scheduled in DA Market can • Modify energy prices for RT Market • Waive start up and no load prices RT Market • All generators can • Re-declare Generator limits to reflect anticipated availability in Real-time • Submit Offers to provide Regulation in Real-time • Can request • Commitment / de-commitment for R/T and SS changes • Requires ISO-NE Approval, entered into COP • IE: Unit coming on-line at 0400 to meet DA obligation starting at 0800 • Participant confirms start with Forecaster, Participant Redec’s limits to reflect start up profile, Forecaster enters commitment change in COP • 1800 Re-Offer Period closes, Reserve Adequacy process begins

  3. ISO-NE Interface Constrained Capacity Analysis At 1600, DA schedules posted to COP • Populate the ISO Capacity Analysis with • ISO Forecast Demand and Reserve Requirements • Congestion area requirements and limitations • DA Market COP • Generator Offer data • External Transactions submitted for Real-time • Fixed and Dispatchable by interface, if submitted prior to 1200 and checked out with neighboring control areas • The application can: • Identify power system & congestion area capacity deficiencies • Identify power system & congestion area excess generation conditions • Evaluate Participant requests to commit, de-commit a unit or change a SS for R/T Market • Update the Capacity Analysis periodically to capture Approved changes to the COP and limit re-declarations.

  4. ISO-NE Reserve Adequacy At 1800, and throughout Operating Day • Update Capacity Analysis with latest data • Identify hours with system and/or congestion area capacity deficiencies and or excess generation conditions • Commit/de-commit for system and congestion areas • Execute SPD security constrained economic dispatch of COP to meet the ISO Demand Forecast and Reserve Requirements. • Review • REG, TMSR, TMNSR, TMOR, ROR • LEG energy sustainability • Execute power flow contingency analysis based on COP • Modify commitment for contingency violations

  5. ISO-NE Reserve Adequacy ISO-NE Capacity Analysis Interface Constrained Manual adjust COP For Interface Constraints COP RA-RSC Commit for Operating Reserve DMT Scheduling Window Current Operating Plan Power Flow Contingency Analysis COP Manual adjust COP for Cont. Violations COP SPD Economic Dispatch Security Constrained

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