Security and Quality of Supply Standards

The Security and Quality of Supply Standards set out criteria and the methodology for planning and operating the National Electricity Transmission System (NETS).


ID Sort ascending Name Affected Status Last updated
GSR025 GSR025: Updating the SQSS to reflect the recent modification to Engineering Recommendation P28 Current 20 Feb 2020
GSR024 GSR024: National Grid Legal Separation Changes Concluded 13 Aug 2019
GSR023 GSR023: Clarification of the N-1-1 Requirements and minor housekeeping change Concluded 20 Feb 2020
GSR022 GSR022: Review of Security and Economy Required Transfer Conditions Current 20 Feb 2020
GSR021 GSR021: Operational and Planning Criteria for 220kV Transmission Assets Concluded 25 Sep 2018
GSR020 GSR020: Modification of Clause to Allow Single Transformer Offshore Substations of Capacity Greater Than 90MW Concluded 20 Feb 2020
GSR019 GSR019: Review of Chapter 7 Double Busbar Requirements Concluded 20 Feb 2020
GSR018 GSR018: Treatment of Sub-Synchronous Oscillations SSO in the NETS SQSS Concluded 25 Sep 2018
GSR017 GSR017: Treatment of Switch Faults in Operational Timescales Concluded 20 Feb 2020
GSR016 GSR016: Small and Medium Embedded Generation Assumptions Current 2 Jan 2019