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Operating Reserve – Spinning

Generation synchronized to the system and fully available to serve load within the Disturbance Recovery Period.

Definition by NERC

Source: 1

The portion of Operating Reserve consisting of:

  • Generation synchronized to the system and fully available to serve load within the Disturbance Recovery Period following the contingency event; or
  • Load fully removable from the system within the Disturbance Recovery Period following the contingency event.

This definition is very similar to the Operating Reserve – Supplemental, but the Supplemental Reserve includes the term "capable of being synchronized".

Last modified: 2025-06-18

← Operating Reserve · Operating Reserve – Supplemental →

  1. NERC (2025). Glossary of Terms Used in NERC Reliability Standards. https://www.nerc.com/pa/Stand/Glossary%20of%20Terms/Glossary_of_Terms.pdf ↩