Generation Reserves


Operating Reserves Overview

Generation reserves are the electricity supplies that currently are not being used but can be quickly available in the case of an unexpected loss of generation. Think of a spare tire – a backup when you need it. The types of reserves are:

Operating Reserve – The amount of power that can be received within 30 minutes. This power can be from:

  • generators that are synchronized (coordinated) to the power grid or offline
  • and from certain loads, designated as demand side response, which can be removed from the grid.
Primary Reserves

Primary Reserve - The amount of power that can be received within 10 minutes. This power can be from:

  • generators that are synchronized to the power grid or offline.
  • And from certain loads, designated as demand side response, which can be removed from the grid.

Synchronized Reserve - The amount of power (connected to the grid) that can be received within 10 minutes. This power can be from:

  • generators that are synchronized to the power grid
  • or from certain loads, designated as demand side response, which can be removed from the grid.

Quick Start Reserve - The amount of power that can be received within 10 minutes from generators that are offline.

Supplemental Reserves

Supplemental Reserve - The amount of power that can be received within 10 to 30 minutes. This power can be from:

  • generators that are synchronized to the power grid or offline
  • and from certain loads, designated as demand side response, which can be removed from the grid.