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Balancing services
Find out about the different types of existing frequency response services and how to get involved.
Balancing services
This page holds historic frequency data for Great Britain at a 1 second resolution. N.B. 2019 data was updated on 14/2/2020 to correct for errors.
Data for 2020 onwards will be published on the…
Codes
You can raise a modification – or mod – when you want to propose a change to any part of the STC. For more information, please contact [email protected] for any current or…
Codes
The System Operator Transmission Owner Code defines the relationship between the transmission system owners and the system operator.As the code administrator for the STC, we maintain the code and…
Balancing services
Having launched our new Dynamic Response Services, Dynamic Containment (DC), Dynamic Moderation (DM) and Dynamic Regulation (DR), we are aiming to lift the volume caps on DM and DR to allow our…
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…
Codes
The STC Transmission Charging Review group (TCRG) reviews transmission owner charging methodologies and how they affect end users. They also discuss the impact of current and developing…
Codes
All documents relating to the STC are available here to download. Including the latest version of the code itself, in full, and details of any revisions.For more information about the code, please…
Codes
The STC modification panel is made up of a panel chair and a panel technical secretary (provided by us), as well as members of the National Grid System Operator, offshore and onshore transmission…