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Frequency Containment Reserves

The active power reserves available to contain system frequency after the occurrence of an imbalance.

Definition in a European Union Regulation

Source: 1 (p5)

‘frequency containment reserves’ or ‘FCR’ means the active power reserves available to contain system frequency after the occurrence of an imbalance.


Last modified: 2025-11-28

Related: contingency-reserve · frequency-restoration-reserves · replacement-reserves

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  1. (2017). Commission Regulation (EU) 2017/1485 of 2 August 2017 establishing a guideline on electricity transmission system operation. http://data.europa.eu/eli/reg/2017/1485/oj