Grid Code Modifications

You can raise a modification – or mod – when you want to propose a change to any part of the Grid Code. 

For more information, please contact [email protected]

Search for any current or concluded modifications by name or ID. You can sort mods by ID, name, status or date of update. Or filter according to status.

IDName Sort descending AffectedStatusLast updated
GC0022GC0022: Frequency Response Concluded 25 Sep 2018
GC0023GC0023: Protection Fault Clearance Times and Back-up Protection Concluded 25 Sep 2018
GC0028GC0028: Constant Terminal Voltage Concluded 25 Sep 2018
GC0036GC0036: Review of Harmonics Assessment Standards and Processes Concluded 25 Sep 2018
GC0037GC0037: Offshore Balancing Mechanism Unit Configuration Concluded 25 Sep 2018
GC0038GC0038: Electricity Balancing System Group EBSG Concluded 25 Sep 2018
GC0042GC0042: Information on Small Embedded Power Stations and Impact on Demand Concluded 25 Sep 2018
GC0044GC0044: Grid Code Changes Resulting From BSC Modification P276 Concluded 25 Sep 2018
GC0048GC0048: Joint GCRP DCRP Workgroup on GB Application of RfG Concluded 25 Sep 2018
GC0050GC0050: Demand Control OC6 Concluded 13 Nov 2018