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Balancing services
Mandatory frequency response (MFR) is an automatic change in active power output in response to a frequency change. The service helps us to keep frequency within statutory and operational limits.…
Balancing services
Firm Frequency Response (FFR) is our traditional frequency response suite used for balancing grid frequency in real time. Static FFR will continue to be actively procured until replaced with a…
Networks
Every year, the ESO assesses and manages outages on the National Electricity Transmission System across the Scotland, England and Wales.
Codes
The Security and Quality of Supply Standard sets out the criteria and methodology for planning and operating the National Electricity Transmission System (NETS).As the code administrator for the…
Codes
All documents relating to the SQSS are available here to download. Including the latest version of the code itself.
For more information about the code, please contact box.SQSS@nationalgrideso.…
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Balancing services
2024-25 Frequency Response volumes D3
Codes
The Frequency Risk and Control Report includes an assessment of the magnitude, duration and likelihood of transient frequency deviations, forecast impact and the cost of securing the system and…