Frequency Regulation

Where this fits

Why interconnected alternating-current grids continuously balance generation and demand.

Core system ideas

System frequency reflects the balance between electrical supply and demand across a synchronized grid.

Small imbalances occur continuously, so automatic controls and operating reserves respond at different timescales.

Large disturbances require coordinated frequency response, protection and restoration actions.

Interfaces and tradeoffs

Reliability involves both routine adequacy and the ability to remain within acceptable conditions after disturbances. Fast controls, reserves, protection, asset condition and trained operators contribute at different timescales.

What organizations measure

Frequency deviation, response, reserves, control error and event performance.