National Grid has an obligation to ensure the security and quality of electricity supply across the GB Transmission System. There are a variety of tools available to assist National Grid in achieving this, including:
For more information on the Balancing Services used to ensure system security please use the links below.
Transmission Constraint Management
A transmission constraint arises where the system is unable to transmit the power supplied to the location of demand due to congestion at one or more parts of the transmission network.
Contingency Balancing Reserve
DSBR is targeted at large energy users who volunteer to reduce their demand. SBR is targeted at keeping power stations in reserve that would otherwise be closed or mothballed.
The Maximum Generation Service allows access to capacity which is outside of the Generator's normal operating range in emergency circumstances.
Intertrip services are required as an automatic control arrangement where generation may be reduced or disconnected following a system fault event.
Black Start is the procedure to recover from a total or partial shutdown of the GB Transmission System which has caused an extensive loss of supplies.
SO to SO
SO to SO services are provided mutually with other Transmission System Operators connected to the GB Transmission System via interconnectors.
Reactive power services
If you are a returning visitor you may find these areas useful.
Electricity Transmission Operational Data
Monthly Balancing Services Summary