Tertiary Control

Actions taken to handle current and future contingencies.

Definition by NERC

Source: ¹

Encompasses actions taken to get resources in place to handle current and future contingencies. Reserve deployment and Reserve restoration following a disturbance are common types of Tertiary Control.

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Last modified: 2025-06-22

Related: primary-control · secondary-control · frequency-regulation · automatic-generation-control · frequency-stability

← System Flexibility · Thermal Limit Operation Criteria →

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1. NERC (2021). Balancing and Frequency Control Reference Document. https://www.nerc.com/comm/RSTC_Reliability_Guidelines/Reference_Document_NERC_Balancing_and_Frequency_Control.pdf ↩