Frequency Containment Reserve (FCR)

Frequency Control Reserve (FCR) is a type of ancillary service that is used to maintain the stability and reliability of the electricity grid. Also known as primary control reserve, it is activated when the frequency of the grid deviates from its normal operating range. In Europe, the TSO operators must maintain a frequency of 50 Hz in order to maintain balance in the grid. FCR works to quickly restore the frequency to its normal level.

When is FCR Activated?

According to ENTSO-E regulations, the full activation of the frequency reserve must be accessible within 30 seconds and cover a duration of 15 minutes for each occurrence as FCR is activated in response to short-duration frequency imbalances in the grid.

When the frequency variation is outside the requirement between 49.99 Hz and 50.01 Hz, participants in FCR procurement are required to submit the volume tendered. At the site of power generation or consumption, FCR suppliers independently measure the grid frequency and respond to frequency changes. After 30 seconds, the aFRR gradually takes the place of the FCR.

What role do batteries have in balancing the grid?

Utility-scale batteries can be an effective source of FCR because they are able to quickly increase or decrease their output in response to changes in the grid. This makes them well-suited for use in frequency regulation, which is the process of continuously adjusting the output of FCR resources to maintain the stability of the grid. By utilizing utility-scale batteries for FCR, utilities can more effectively balance supply and demand on the grid and improve the overall reliability and stability of the system.

What is the difference between FCR, aFRR and mFRR?

Frequency control reserve (FCR) is a type of ancillary service, which are specialized services that are used to support the operation of the electricity grid. Ancillary services are necessary because they help to ensure that the grid is able to meet the changing demands of electricity consumers and maintain its stability and reliability. Other types of ancillary services include Manual Frequency Restoration Reserve (mFRR), and Automatic Frequency Restoration Reserve (aFRR). Together, these services help to maintain the balance between supply and demand on the grid and keep the frequency of the grid within its normal operating range.

As an energy asset owner, you may be interested in finding ways to create more value from your assets. Nano Energies has expertise in ancillary services and can help you optimize the operation of your assets and increase their value. If you want to learn more about how we can help you, don't hesitate to contact us for more information.

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