GC0183: Generator and Interconnector Availability During a Severe Space Weather Event

This modification will make changes to the Grid Code to obligate Generators and Interconnectors to notify NESO of their intended position in the event of severe space weather.

Modification status:

Implemented - GC0183: Generator and Interconnector Availability During a Severe Space Weather Event

Last updated:

04 December 2025

Code Administrator Contact: [email protected]

Governance Route: Urgent modification to proceed under a timeline agreed by the Authority

Impacts: High impact on Generators, Interconnector Owners, Restoration Contractors and National Energy System Operator. Medium impact on Network Operators.

Code modification proposed by:

Helen Newman

[email protected]

Documents

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GC0183 Proposal Form

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GC0183 Urgency Decision Letter
GC0183 Urgency Request Letter

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GC0183 Workgroup 4 Papers
GC0183 Workgroup 4 Summary
GC0183 Workgroup 5 Papers
GC0183 Workgroup 5 Summary
GC0183 Workgroup 3 Summary
GC0183 Workgroup 1 Summary
GC0183 Workgroup 2 Summary
GC0183 Workgroup 3 Papers
GC0183 Workgroup Actions Log
GC0183 Workgroup 1 Papers

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GC0183 Workgroup Consultation Response Form
GC0183 Alternative Request Form
GC0183 Workgroup Consultation
GC0183 Workgroup Consultation and Annexes

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GC0183 Workgroup Report
GC0183 Workgroup Report and Annexes

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GC0183 CAC and Annexes
GC0183 CAC Response Proforma
GC0183 Code Administrator Consultation

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GC0183 Final Modification Report and Annexes
GC0183 Final Modification Report
GC0183 Draft Final Modification Report and Annexes
GC0183 Draft Final Modification Report

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GC0183 Authority Decision Letter

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GC0183: Generator and Interconnector Availability During a Severe Space Weather Event

Documents