Alstom, which has a base in Staffordshire, and Aberdeen-based Petrofac will provide the onshore and offshore substations as well as onshore cabling for the project.

The consortium will start the detailed design of the electrical system including ordering of several major electrical parts like transformers, static VAR compensators and offshore switchgear.

Upon completion, the wind farm is expected to generate enough energy for about 330,000 homes in the UK.

Galloper Wind Farm project director Bart Oberink said: "The announcement of preferred supplier status and the awarding of this major contract is a key milestone for the delivery of the project and the rest of the supplier negotiations are advancing to timetable.

"We expect to extend the scope of Alstom and Petrofac’s contract once the Financial Investment Decision for Galloper is announced later this year."

Enabling works for wind farm’s onshore substation are progressing with onshore cable installation work scheduled to start in early 2015.

The wind farm is a joint venture between RWE and SSE but SSE recently agreed to sell its stake after a review of offshore wind development portfolio.

RWE will be responsible for ongoing decisions and funding of the project and will make announcements on the selection of preferred suppliers for other key contracts in the near future.

Image: Upon completion, the Galloper wind farm is expected to generate enough energy for about 330,000 UK homes. Photo: Courtesy of njaj/