Automatic Generation Control

AGC. Automatic regulation of the power output of generators

Relevant items: Fast Frequency Response   Primary Control   Secondary Control   Tertiary Control   Frequency Regulation   Frequency Stability

Automatic Generation Control (AGC)

Means equipment that automatically adjusts a Control Area’s generation from a central location to maintain its interchange schedule plus Frequency Bias.

AGC by FERC

The automatic regulation of the power output of electric generators within a prescribed range in response to a change in system frequency, or tie-line loading, to maintain system frequency or scheduled interchange with other areas within predetermined limits.

Footnotes

    References

    1. Glossary of Terms Used in NERC Reliability Standards[PDF]
      NERC,, 2025.
    2. FERC Glossary - Market Assessments[link]
      FERC,, 2020.