What is firm frequency response (FFR)

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Firm Frequency Response is a service provided by energy users to National Grid, which uses approved assets to quickly reduce demand or increase generation to help balance the grid and avoid power outages.

The current UK power network is becoming increasingly challenging to balance. At times of high volatility, National Grid needs additional flexible generation and demand to balance the system and avoid power outages. Firm frequency response (FFR) uses approved assets to quickly reduce demand or increase generation when there is a large deviation in system frequency. Energy asset owners are rewarded for providing this service all year round, even if it is never deployed.

How does firm frequency response work?

National Grid needs help when there are large deviations in system frequency caused by too much generation compared to demand or vice versa e.g. when a power station unexpectedly shuts down. In such events, to ensure that generation and demand can be quickly balanced to avoid blackouts, FFR uses approved assets to quickly reduce demand or increase generation.

Who can offer FFR?

Businesses with suitable equipment with inherent flexibility like businesses with flexible demand, generation or energy storage at commercial or industrial sites could all offer FFR to National Grid, providing they meet the minimum requirements. We are currently working with flexibility providers who have assets including batteries, heating and cooling systems, freezers and diesel generators. If you are interested in benefiting from offering FFR to National Grid call us to find out more about how we can help you in the process.


Give us a call on 0330 726 0050 to speak to one of our experts. Alternatively you can send us a message and we’ll get back to you.