These pages contain information on the operation and balancing of the National Electricity Transmission System.
National Grid balances the system ensuring that supply and demand are balanced on a second by second basis, 24hours a day, 365 days a year.
Normal operating frequency of the system is around 50hz, National Grid are obliged to maintain the system frequency between 49.5Hz and 50.5Hz, although normal operating limits of 49.8Hz to 50.2Hz normally apply.
Further information can be found, by using the links below to key operational industry websites
• BMRS website (Elexon) - Balancing Mechanism half hourly data close to real-time
• Elexon website - Delivers the Balancing Settlement Code and longer term (e.g. 2-14 day, 2-52 week) market forecast data
• SONAR - Bulletin board for National Grid operational notifications
Click here to access the latest operational data via the Electricity Transmission Operational Data Portal including real time flow data
National Grid is the GB Electricity industry’s Residual Balancer and procures Mandatory and Commercial Balancing Services to maintain system balance.
Balancing Services Use of System Charges
The costs National incurs in acting as the GB Residual Balancer are distributed across the industry
To view the latest Monthly Balancing Services Summary report
To view our (Network Access) Outage Management pages
Click here to see the latest Balancing Frameworks
To view the latest Winter and Summer Outlook Reports
Codes and Legislation
Getting a connection
For more information please see links below