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.
| ID | Name | Status | Last Updated | |
|---|---|---|---|---|
| GC0079 | GC0079: Frequency Changes during Large Disturbances and their effect on the total system - Phase 1 & 2 | Concluded | ||
| GC0091 | GC0091: Joint GCRP DCRP Workgroup on GB Application of Demand Connection Code | Concluded | ||
| GC0090 | GC0090: HVDC | Concluded | ||
| GC0086 | GC0086: Open Governance | Concluded | ||
| GC0023 | GC0023: Protection Fault Clearance Times and Back-up Protection | Concluded | ||
| GC0088 | GC0088: Voltage Unbalance | Concluded | ||
| GC0028 | GC0028: Constant Terminal Voltage | Concluded | ||
| GC0076 | GC0076: Grid Code Limits on Rapid Voltage Changes | Concluded | ||
| GC0087 | GC0087: Requirements for Generators Frequency Provisions | Concluded | ||
| GC0061 | GC0061: Amendments Required to Implement the Electricity Supply Emergency Code ESEC | Concluded |
More about modifications
Our Tracker gives you the latest details on current code modifications including the purpose and the stakeholders it affects, as well as panel comments and where it is in the review process. It is published on the 7th (or next working day) of each month.
If you're thinking about raising a modification, please get in touch with us. Our experts can give you advice on your Proposal, explain how the modification process works and help to answer any questions you may have. When we receive your Proposal, we'll check it through and work together to make sure it's easy to understand.
Once you've been in touch and are ready to write your Proposal paper, send it to us by the monthly modification submission date which you can find on our Calendar.