GC0182: Standardisation of Power Flow Metering Polarity
What is being proposed
This modification aims to provide a unified standard for Power Flow Metering Polarity when data is sent to NESO. The standard will be in the format of a diagram and explanatory description.
Current status
The Proposal was presented to the Panel, in July 2025. The Panel agreed the modification could proceed as Standard Governance with Workgroups. Workgroup Nominations opened on 29 July and closed on 18 August. 09/02/2026: The next Workgroup is scheduled for 24 March 2026.
Details
Timeline
Analysis
NESO proposes standardising power flow metering polarity across all parties sending data to the system operator. The modification creates a unified diagram and description format for how power flow direction is reported. Workgroups begin March 2026 with transmission system owners, interconnectors and network operators most affected.
Why it matters
Administrative standardisation that reduces data interpretation costs without changing market structure. Creates common language for power flow reporting but does not alter charging, connection rules, or market access.
Key facts
- •Workgroup nominations closed 18 August 2025
- •Next workgroup scheduled 24 March 2026
- •High impact on transmission system owners, interconnectors, network operators
- •Cross-code impact with STC