Construction of a major new substation at Isle of Grain has reached a key milestone, supporting efforts to modernise the grid and enable lower-carbon energy.
National Grid confirmed completion of the main building hall at the Wallend Substation, which will house advanced gas-insulated switchgear.
The project is designed to strengthen the electricity network and improve system flexibility as renewable generation increases.
Once operational, the substation will connect to the NeuConnect Interconnector, a 1.4GW link between the UK and Germany.
This will support cross-border energy flows, enhancing resilience and helping integrate cleaner power sources.
The next phase will see installation of SF₆-free switchgear technology supplied by Hitachi Energy.
The use of this equipment supports National Grid’s target to cut sulphur hexafluoride emissions by 50% by 2030, reducing the environmental impact of grid infrastructure.
The project is being delivered with Balfour Beatty and forms part of wider investment in energy security and decarbonisation.
A community grant scheme is also supporting local initiatives, ensuring wider social and environmental benefits.
Hannah Ward said: “The Wallend Substation represents a key investment in strengthening the UK’s electricity network and enabling cleaner, more secure power for the future.”
Industry partners say the development will help create a more resilient, efficient and sustainable energy system.
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