Security and Quality of Supply Standard (SQSS)

Transmission licensees – both onshore and offshore – are required by their licences to comply with the National Electricity Transmission System Security and Quality of Supply Standards (NETS SQSS), which sets out criteria and methodologies for planning and operating the GB Transmission System.

The SQSS Panel is responsible for keeping the standard under review and submitting any proposed changes to us for a decision.

In certain circumstances Ofgem may grant a derogation from the obligation to comply aspects of the NETS SQSS. Under the Connect and Manage process (which allows generation to connect before wider works to the transmission system have been completed) National Grid Electricity Transmission (as System Operator) also has the power to grant certain derogations.

Publications and updates

  • Published: 12th Aug 2011
  • Closed: 23rd Sep 2011
  • Consultations and responses
  • 8 Associated documents
This IA assesses, and seeks views on, the impacts of GSR009, a proposal to modify the Security and Quality of Supply Standard (SQSS).

  • Published: 25th Jan 2011
  • Decisions
  • 2 Associated documents
This letter outlines the decision of the Authority to approve the proposal to amend the infeed loss risk limits within the SQSS.

  • Published: 29th Oct 2010
  • Closed: 26th Nov 2010
  • Consultations and responses
  • 12 Associated documents
This document assess the impacts of GSR007 – a proposal to modify the National Electricity Transmission System Security and Quality of Supply Standard.

Pages