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 look to manage constraints requirements via constraint management tenders or bilateral agreements, in an economic and efficient way.

The accepted providers will be selected with the aim of ensuring the total costs of managing system constraints are lower than without the procurement of constraint management services.

The principles for the assessment of voltage constraint management services can be found in the following document: