Ancillary Services

Operating Reserve – Spinning Reserve Service

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Definition

An ancillary service consisting of unloaded generating capacity that is synchronized to the grid and can respond automatically and immediately (within 10 minutes) to serve load following a sudden loss of generation or transmission capacity. Spinning reserves must be online and operating at part-load, ready to ramp up instantly, serving as the first line of defense against unexpected generation or transmission contingencies.

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Topic Deck

Ancillary Services

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Source

FERC Pro Forma OATT / LGIP

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