Mandatory Frequency Response helps to fulfil National Grid's obligation to ensure that sufficient generation and/or demand is held in automatic readiness to manage all credible frequency change contingencies.
All generators caught by the requirements of the Grid Code are required to have the capability to provide Mandatory Frequency Response. The capability to provide this Service is a condition of connection for generators connecting to the GB Transmission System.
Mandatory Frequency Response is an automatic change in active power output in response to a frequency change. The service is needed to maintain the frequency within statutory (49.5Hz - 50.5Hz) and operational limits (49.8Hz - 50.2Hz).
National Grid achieves this by using one of three response services, which are defined below:
Primary Response - provision of additional active power (or a decrease in demand) within 10 seconds after an event and can be sustained for a further 20 seconds.
Secondary Response - provision of additional active power (or decrease in active power demand) within 30 seconds after an event and can be sustained for a further 30 minutes.
High Frequency Response - the reduction in active power within 10 seconds after an event and can be sustained indefinitely.
Your contact lead is: Adam Sims
Tel: 01926 655292