National Grid has named Siemens Energy as its preferred bidder to deliver high-voltage direct current (HVDC) converter stations for the Sea Link project, marking a key step toward enhancing the UK’s power transmission infrastructure.
The selection of Siemens Energy enables early-stage planning and coordination between the two companies ahead of a full contract award. This stage is regarded as essential for securing market capacity and initiating detailed delivery preparations.
The proposed 138-kilometre Sea Link connection will run predominantly under the North Sea, linking Pegwell Bay in Kent to a coastal point between Aldeburgh and Thorpeness in Suffolk. Designed to reinforce the electricity grid in both regions, the project aims to facilitate the transfer of renewable and low-carbon energy to households, businesses and public services.
HVDC technology is recognised for its efficiency and reliability in transmitting large volumes of electricity across long distances. Onshore cables will connect each subsea converter station to the national transmission network.
Sea Link is part of National Grid’s broader initiative, The Great Grid Upgrade, which seeks to expand and modernise the UK’s energy infrastructure in response to a projected doubling of electricity demand.
“This is a major milestone for Sea Link – a vital part of Great Britain’s energy network, designed to meet rising demand and strengthen energy security,” said Adrian Pierssene, Sea Link project director at National Grid. “Siemens Energy, a leader in advanced energy technology, brings specialist expertise that will support the delivery of the infrastructure needed for the UK’s future energy network.”
Mark Pilling, vice president of grid solutions Europe at Siemens Energy, said: “Sea Link is another crucial step in our efforts to meet the UK’s expanding electricity needs, delivering security of supply and reinforcing our grid – a key part of our energy transition. We’re looking forward to continuing our strong working relationship with National Grid.”
The announcement of Siemens Energy as the preferred bidder does not influence the outcome of the project’s Development Consent Order (DCO), which remains under review by the Planning Inspectorate.
