VBMS was contracted by WPD Offshore Solutions GmbH (WPD) to supply, install and protect (by post-lay burial) the high-voltage inter-array cable at the offshore wind farm of Butendiek. This German wind farm is situated in the German Bight, approx. 34 km west of the island of Sylt. The 27 km2 wind farm consists of 80 wind turbines with a capacity of 3.6 MW each and a total capacity of 288 MW. The wind farm, expected to be operational in late 2014, will provide power to between 200,000 and 240,000 households.
The infield cables were loaded in two batches at Drammen in Norway and then cut down to the correct size on site. The WTGs were connected in a grid of infield cables. 86 individual cables were installed between the turbines, including 6 redundancy cables, amounting to a total length of approximately 90 km for the infield cabling. Cable production commenced in December 2013. The cables were installed in the summer of 2014 using the Stemat Spirit. This vessel has been converted so that the long cable protection system lengths can be handled. Trenching of the cables was performed using a separate trenching spread. Termination, testing and commissioning of the 12 cable strings will be carried out using in-house resources.
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