It is claimed that the Walney Extension Offshore Windfarm will be the largest in the world once completed. Credit: Ørsted.

Danish energy firm Ørsted has revealed that the Walney Extension Offshore Windfarm is nearing the end of its final construction phase, which is expected to be completed later this year.

Upon completion, it is said the project will be one of the largest offshore windfarms in the world.

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Located in the Irish Sea approximately 19km from the Walney Island coast in Cumbria, the farm covers an area 145km. It has been designed to generate 659MW of power to supply electricity to more than half a million homes in the UK.

The windfarm is currently owned by Ørsted (50%) and Danish pension funds PFA (25%) and PKA (25%).

“Both offshore and onshore works are well advanced and our focus is set on completion in the second half of 2018.”

Ørsted Walney Extension programme director Andrew Cotterell said: “We are very pleased with the progress we are making on the project and remain on schedule, despite some quite challenging weather conditions.

“In general, both offshore and onshore works are well advanced and our focus is set on completion in the second half of 2018.”

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The Walney Extension is being built in two phases using Siemens Gamesa and MHI Vestas turbines. The first three of 47 Siemens Gamesa 7MW turbines were installed in the second phase, while MHI Vestas is reported to have installed 40 of its 8MW turbines during the first phase of the project.

Siemens Gamesa UK & Ireland managing director Clark MacFarlane said: “Siemens Gamesa is delighted to see this exciting and world-leading project nearing completion.

“For Siemens Gamesa, it is world-leading also as it is the first installation of our 7MW turbines. In less than a year, we shall see a further half million UK homes benefitting from clean, green energy for years to come.”