SSEN Transmission has awarded Hitachi Energy major contracts to supply high-voltage direct current (HVDC) converter stations for two subsea power links: the already consented Spittal–Peterhead connection between Caithness and Aberdeenshire, and a proposed link from the Western Isles to the Scottish mainland.

The decision follows Hitachi Energy's selection as preferred bidder in 2023 and subsequent appointment under a framework intended to speed the UK's clean-energy transition. The contracts span design, procurement, manufacturing, installation and commissioning of the HVDC converter technology.

The award underlines SSEN Transmission's commitment to deliver social value alongside critical grid upgrades. In November, the company became the first to sign the Highland Social Value Charter, promising a range of benefits for communities across the Highlands as part of its £22bn+ investment programme, including local contracting, investment in roads and bridges, support for housing, community benefit funding and a net gain in biodiversity.

Niklas Persson, Managing Director of Hitachi Energy's Grid Integration business, said: "We are proud to contribute our HVDC technology to these landmark projects that will strengthen the UK's transmission network and accelerate the energy transition. Delivering reliable power at scale requires not only advanced solutions but also deep collaboration and shared commitment to strengthen the UK and European grids. Together with SSEN Transmission, we are shaping a future where clean power flows seamlessly across borders, accelerating progress toward a sustainable, carbon-neutral society for generations to come."

-- Advertisement --

The Western Isles scheme will allow renewable electricity generated on the islands to be exported to, and imported from, the mainland grid, while the Spittal–Peterhead link will create a strategic transmission corridor across the north of Scotland. Both projects form part of SSEN Transmission's wider £22bn+ plan to reinforce the northern Scotland network to meet energy security and clean power goals.

Hitachi Energy brings extensive global and UK experience in delivering HVDC systems. With this award, the company and SSEN Transmission reaffirm their joint commitment to the UK's clean-energy ambitions and to enabling reliable, large-scale renewable power transmission nationwide.

Sandy Mactaggart, SSEN Transmission's Director of Offshore Delivery, said: "Today's contract award marks another significant milestone in delivering the critical national infrastructure required to unlock Scotland's renewable energy potential. The Western Isles and Spittal to Peterhead links will play a vital role in strengthening our network, enhancing security of supply and enabling the connection of home-grown clean energy for homes and businesses across the country.

"As the first business to sign the Highland Social Value Charter, we're also committed to ensuring that projects like these deliver clear and lasting benefits for the communities who host them - from local job creation and skills development to wider economic and environmental improvements. We're looking forward to continuing our close collaboration with Hitachi Energy as we progress these transformative projects and deliver the transmission system our clean energy future needs."

For the Spittal–Peterhead link, the Banniskirk (Spittal) and Netherton Hub (Peterhead) converter stations have planning consent and the marine licence is in place, with full construction due to begin shortly. For the Western Isles link, the Lewis Hub (Stornoway) has received planning consent, a planning application for the Fanellan converter station near Beauly is before Highland Council, and a marine licence application has been lodged.

Subject to remaining approvals, both subsea links are expected to be energised by 2030, adding vital capacity to move clean, secure and affordable electricity across Scotland and to consumers throughout Great Britain.