We are becoming a separate company

In April 2019, the Electricity System Operator is becoming a separate company within the National Grid Group. Find out more about what this change will mean.

Transmission constraint management

Constraint management is required where the electricity transmission system is unable to transmit power to the location of demand, due to congestion at one or more parts of the transmission network. Here you can find out how to provide this service.

We will make payments following the standard settlement for balancing services, which is paid monthly. A final statement, along with the self-bill invoices, is issued by the eighteenth business day of the following month that the service was provided.

The structure of the payment will be determined by the style of the constraint management contract required.

Some examples of the possible payment rates are:

  • utilisation fee £/MWh;
  • a fixed £/settlement period fee;
  • a £/settlement period fee for making a service available combined with a £/settlement period fee for use of the service; and
  • a £/settlement period fee for making a service available combined with a £/MWh fee for use of the service.