ABB has handed over the DolWin1 offshore grid connection to the Dutch-German transmission system operator TenneT. The 800 MW High Voltage Direct Current (HVDC) link connects offshore wind farms around 75 km off the German coast in the DolWin cluster, with the country’s transmission grid.
The wind farms Borkum West 2 and Borkum Riffgrund 1 are connected via submarine cables to DolWin alpha, the offshore converter station. Here the alternating current from the wind farms is converted into direct current before being transmitted at a voltage of +/- 320 kV via 165 km of extruded DC submarine and underground cables to the grid connection point at the Dörpen West substation in Heede, northern Germany.
ABB deployed its Voltage Source Converter (VSC) technology, called HVDC Light, for the project and was responsible for the design, engineering supply and installation of the offshore and onshore converter stations, as well as the submarine and underground cable systems.
“We are proud to hand over the DolWin1 offshore wind grid connection to TenneT and to make a significant contribution to Germany’s target of increasing its share of renewables in the energy mix,” said Claudio Facchin, President, ABB Power Systems division. “We pioneered HVDC technology and have remained at the forefront of its innovation. We are pleased to see it being leveraged to bring clean energy to millions of people reliably and efficiently.”
Katharina Garus
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