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 Sort ascending | |
|---|---|---|---|---|
| GC0168 | GC0168: Submission of Electro Magnetic Transient (EMT) Models | Current | ||
| GC0155 | GC0155: Clarification of Fault Ride Through Technical Requirements | Current | ||
| Establishing ISOP in industry codes 2024 | Establishing ISOP in industry codes 2024 | Current | ||
| GC0169 | GC0169: Material changes arising from Grid Code Modification GC0136 | Current | ||
| GC0173 | GC0173: Consistency of Technical and Compliance Requirements between GB and European Users | Current | ||
| GC0166 | GC0166: Introducing new Balancing Mechanism Parameters for Limited Duration Assets | Current | ||
| GC0159 | GC0159: Introducing Competitively Appointed Transmission Owners | Current | ||
| GC0171 | GC0171: Improving the clarity and transparency of the Compliance Process for Small Generators with a Bilateral Embedded Generator Agreement (BEGA) | Implemented | ||
| GC0139 | GC0139: Enhanced Planning-Data Exchange to Facilitate Whole System Planning | Current | ||
| GC0145 | GC0145: Updating the Grid Code to include the Manually Activated Reserve Initiative (MARI) | Withdrawn |
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.