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Prysmian to Connect Offshore Wind Farms in the North Sea to the German Power Grid

02/8/2011 8:00AMSign-up to receive press releases.

Prysmian has been awarded a project worth more than €250 million by the Dutch-German grid operator TenneT for the connection project SylWin1, linking offshore wind farms in the North Sea to mainland Germany.

Prysmian will provide supply, installation, and commissioning of submarine and land cable connections as part of a larger contract awarded to the consortium of Prysmian and Siemens Energy. Siemens will deliver the Voltage Sourced Converter (VSC) system, with a rating of 864 MW. The turnkey connection will link the offshore wind park DanTysk, located about 160 km offshore, to the mainland with the purpose of transmitting power from renewable source into the German Grid.

The SylWin1 project will use extruded HVDC cable technology from Prysmian together with Siemens HVDC Plus® converter technology at the offshore platform and onshore stations. The interconnection consists of HVDC subsea and land cable types at a voltage of ± 320 kV dc to be supplied by Prysmian along a 159 km sea route passing to the east of Helgoland and continuing along a 45 km land route to the land converter station in Büttel, north-west of Hamburg. Extruded 155 kV HVAC submarine cable connections will complete the connections from the DanTysk offshore wind park transformer platform to the offshore converter platform. The cable system’s configuration consists also of a fiber optic cable for signaling and communication purposes.

The cables and accessories will be manufactured starting in 2012 at Prysmian’s European HV factories. Installation activities will commence in 2012 and continue into 2013. The commencement of commercial operation of the HVDC link is planned for 2014.


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