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Siemens begins North Sea offshore transmission project

GERMANY: Siemens Energy has begun work on its recently-won contract to build a transmission link for a 400MW offshore wind farm in the North Sea -- in a joint venture with Italian cabling firm Prysmian.

The job was awarded by grid operator TenneT TSO and is worth more than €500 million to the venture. It will see Siemens and Prysmian construct a 690MW HVDC link between the Amrumbank West wind farm and the onshore grid.

Together with the Meerwind and North Sea East offshore wind farms, Amrumbank West is part of the North Sea cluster HelWin. The transmission link won by the Siemens/Prysmian JV is to be known as HelWin 2.

The centrepiece of the HelWin 2 link-up is the offshore converter platform HelWin beta, on which the Siemens HVDC Plus transmission system is installed. It also houses two power transformers and the gas-insulated high-voltage switchgear.

Siemens is responsible for turnkey supply of the fully equipped floating offshore substation. TenneT has also awarded Siemens a contract to carry out all maintenance work on the platform and on the onshore transformer substation for an initial period of five years.

The contract award follows the JV's winning of the job to build the transmission link for the 288MW DanTysk offshore wind farm in January.

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