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.

Enhanced reactive power service (ERPS)

The enhanced reactive power service (ERPS) is suitable for generators who can provide reactive power over and above the Grid Code and obligatory reactive power service (ORPS) requirements. On this page, you can find out about the route to market.

The ERPS is procured via tenders. These are held every six months. You can find details of the latest tender round under the Market information tab.

Tenders are assessed using the evaluation criteria specified in the CUSC. This evaluation process considers the following:

  • economics (i.e., the cost of market compared with default price);

  • the intrinsic capability value of the tendered reactive service, against the alternative of our reactive assets; and

  • a number of other criteria, such as how competitive the utilisation price was, and what incentive the generator was placing on itself to maintain the reactive capability.