Ancillary Services

Operating Reserve – Supplemental Reserve Service

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Definition

An ancillary service consisting of generating capacity — either online or offline — that can be brought to full load within 10 minutes following a system disturbance. Unlike Spinning Reserves, Supplemental Reserves need not be synchronized to the grid at the time of the contingency, providing a second tier of backup capacity to restore system reliability after an event.

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Topic Deck

Ancillary Services

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Source

FERC Pro Forma OATT / LGIP

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