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    03 — Value stream · VS-380

    Forecast-to-Balance

    Carry an operating day on the bulk power system from load and renewable forecasts through unit commitment, interchange and real-time balancing to a secure system and settled schedules. Where Outage-to-Restoration (VS-240) restores customers after a distribution fault, this keeps generation and load matched within the grid's limits.

    • Operating Day Cycle
    • Plan-to-Balance
    • Day-Ahead-to-Real-Time
    // FIG. 03 · Stage flow
    1Forecast Load & R…2Commit & Schedule3Study the Day4Balance in Real T…5Recover from Cont…6Settle & Review
    1. 01

      Forecast Load & Renewables

      VS-380.10

      Forecast load and wind and solar output for the operating day by hour and area.

    2. 02

      Commit & Schedule

      VS-380.20

      Commit units, or offer them to the market operator that commits them, submit schedules and agree interchange with neighboring balancing areas.

    3. 03

      Study the Day

      VS-380.30

      Study the planned dispatch and outages against operating limits and adjust before the day starts.

    4. 04

      Balance in Real Time

      VS-380.40

      Keep generation and interchange matched to load, holding frequency and flows within limits as conditions change.

    5. 05

      Recover from Contingencies

      VS-380.50

      Deploy reserves after a unit or line trips, relieve overloads, call demand response and, in an emergency, direct load shedding.

    6. 06

      Settle & Review

      VS-380.60

      Reconcile actual against scheduled energy, settle imbalance and review events for lessons and standards evidence.