Contractor gets green light for offshore HVDC transmission system in UK

Aker Solutions has been awarded a ‘limited notice to proceed’ contract by Vattenfall for construction of a high voltage direct current (HVDC) offshore platform for a 1.4GW offshore wind project in the UK.

The Norfolk Vanguard West project is off the UK's Norfolk coast (Image credit: Loop Images via Getty Images)

Located more than 47km from UK’s Norfolk coast, Norfolk Vanguard West was planned to be the first phase of Vattenfall’s Norfolk Offshore Wind Zone, which also includes the Norfolk Vanguard East and the recently-shelved Norfolk Boreas developments.

The project is still subject to regulatory approvals and Vattenfall’s final investment decision (FID) and the contract includes a balanced risk/reward profile based on principles for long-term collaboration.

Aker’s remit includes joint responsibility with Siemens Energy for the engineering, procurement, construction and installation of the HVDC offshore platform. The fabrication of the topside will be a joint venture with Drydocks World Dubai, while the substructure will be fabricated at Aker Solutions’ yard in Verdal, Norway.

“The development of the entire Norfolk Offshore Wind Zone could ultimately require up to three HVDC platforms in succession, which would improve the long-term predictability and give positive repeat effects and standardisation within the supplier industry,” said Sturla Magnus, executive vice president of new build at Aker Solutions.

Contract value

Aker Solutions will book a contract value of about NOK 4 billion (€3.4bn) in the fourth quarter of 2023 in its ‘renewables and field development’ segment, reflecting the compensated work that is to be performed until the expected FID. Following the final award, the total contract value for Aker Solutions is estimated to be about NOK 6 billion (€5.1bn).