Siemens Energy is to supply a new HVDC connection to the BorWin5 offshore array in the North Sea. A contract has been agreed between the German-Dutch network operator TenneT and the BorWin5 Offshore Consortium, which consists of Siemens Energy and Dragados Offshore. In 2025, the platform BorWin epsilon, which is part of the BorWin5 project, will begin the transmission of electricity produced by the EnBW He Dreiht wind farm off the island of Borkum to the Garrel/Ost converter station around 230 km away distant, at a transmission capacity of 900 MW.
The project is a further contribution toward decarbonising Germany’s energy supply. BorWin5 marks the seventh HVDC offshore grid connection project undertaken by Siemens Energy in Germany with TenneT.
Beatrix Natter, executive vp of the Transmission Division at Siemens Energy cmmented: “When DolWin6 and BorWin5 begin operation, we’ll have installed a total transmission capacity [serving] 5.6 GW of wind power in the German North Sea. This could supply around seven million German households with green electricity”.
The scope of supply for Siemens Energy and its Spanish partner Dragados Offshore S.A. includes the turnkey construction and installation of the offshore platform in the North Sea and the converter station on land. The offshore converter station will convert the three-phase AC produced by the wind turbines into ±320 kV DC, to be converted back to 3-phase AC at the shoreside converter station in Garrel/Ost. Siemens Energy will supply the HVDC technology required for the project and build the shoreside station, while Dragados will be responsible for the design, procurement, construction and installation of the offshore converter platform.