Hitachi Energy will be responsible in the design, procurement, manufacture, installation, and commissioning of the HV DC converter technology.
These projects are designed to enhance the region's power transmission capabilities and support the United Kingdom's progress toward renewable energy objectives.
As part of the agreements, Hitachi Energy will handle the design, procurement, manufacturing, installation, and commissioning of HVDC converter technology for the two subsea links. Converter stations will be placed at both ends of each cable.
One project involves an established connection between Spittal in Caithness and Peterhead in Aberdeenshire. The second is a planned link that will connect the Western Isles to the Scottish mainland.
These developments are components of SSEN Transmission's substantial £22 billion ($29.48 billion) investment plan focused on modernizing northern Scotland's electricity transmission network.
The initiatives are projected to improve energy reliability and facilitate the integration of renewable sources throughout Scotland and Great Britain.
The Western Isles connection will enable the transfer of renewable electricity generated on the islands to the mainland network, and in the opposite direction when required. The Spittal to Peterhead route will serve as an important transmission pathway in northern Scotland.
Hitachi Energy grid integration business managing director Niklas Persson 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."
The contracts build on Hitachi Energy's designation as preferred supplier in 2023 and its formal selection under a framework agreement to advance the UK's renewable energy goals.
Planning permissions have been secured for the Banniskirk (Spittal) and Netherton Hub (Peterhead) converter stations, along with a marine licence, allowing construction of the Spittal to Peterhead subsea cable to begin shortly.
For the Western Isles initiative, the Lewis Hub near Stornoway has gained approval, while the application for the Fanellan converter station near Beauly is under consideration by Highland Council. A marine licence request has also been filed.
Subject to remaining authorizations, both subsea connections are scheduled to enter service by 2030.
SSEN Transmission offshore delivery director Sandy Mactaggart 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."
In a related development earlier this year, Hitachi Energy won a contract valued at up to $700 million from German network operator E.ON to deliver transformers aimed at improving that country's electricity grid reliability, resilience, and accessibility.
