Greenlink’s 504MW interconnector is transferring power between Ireland and the UK following connections into the electricity transmission networks on both sides of the Irish Sea.

An event, officially launching the new 320kV interconnector, took place today in Enniscorthy, Co Wexford, with attendees hearing how the latest connection between Ireland and the UK would help boost Ireland and the UK’s energy security and resilience.

The project, developed by Greenlink, comprises two high voltage direct current (HVDC) subsea cables and associated converter stations. The interconnector connects at substations on EirGrid’s network and the UK’s National Grid.

Harness the potential of clean power

Along with boosting energy security and resilience, the connection will also increase capability to harness the potential of clean power by sharing surplus generation between Ireland and the UK.

At the Irish end of Greenlink’s 200km span – 160km of which is under the sea – the interconnector connects into EirGrid’s Great Island substation in Co Wexford.

Converter stations located adjacent to the substations at each end of the interconnector convert its direct current (DC) electricity to alternating current (AC), for use when imported onto each country’s grid, with the reverse process taking place to export power over the link.

The interconnector is owned by Greenlink and operated by EirGrid.

James O'Reilly, CEO of Greenlink Interconnector Limited, said: “The successful completion of the Greenlink Interconnector marks a significant milestone as one of the first privately developed and funded energy projects between the UK and Ireland. This achievement reflects the technical expertise and collaboration of the Greenlink team and our trusted partners, Siemens Energy and Sumitomo Electric.

“By enabling the transfer of green energy across borders, Greenlink strengthens energy security, enhances sustainability, and fosters greater connectivity with the wider European market.”

Making Ireland's grid renewable ready

Michael Kelly, interim chief operations and asset management officer at EirGrid said: "EirGrid is leading the transition to a low carbon future by making Ireland's grid renewable ready and this connection signifies the latest milestone in that journey.

"This latest connection marks a vital step forward in strengthening our shared commitment to energy resilience and security and was made possible through combining expertise, resources and innovation with our UK colleagues and through collaboration with the Greenlink team.”

John Twomey, director of customer connections at National Grid Electricity Transmission, said: “As demands on our electricity grids evolve, interconnectors provide immense value by strengthening security of electricity supplies and improving our collective ability to exploit the renewable power produced across borders.

“Connecting Greenlink to our network ensures we can contribute to, and benefit from, that boost in capacity and resilience as we continue to upgrade our wider network to support Britain’s ambitious clean energy targets.”