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.

Super SEL

Super SEL is utilised to directly decrease the sum of the minimum MW level or Stable Export Limit (SEL) of generators synchronized to the system by lowering the minimum generating level at a generator synchronised.

Interested Super SEL providers must submit an expression of interest with an outline of their capability to provide the footroom service including but not limited to:

  • technical description of the assets

  • SEL reduction volumes which can be achieved where applicable including different operating mode configurations

  • date from which SEL reduction option is valid

  • minimum notice period required to achieve SEL reduction

  • maximum period reduced SEL can be sustained

  • impact on ancillary services

  • Reactive Range of the machine between ‘normal’ SEL and new lower SEL

If a provider is interested in prequalifying please send your expression of interest via to email to [email protected] no later than 10:00 on 5 March 2018.