Siemens Supplies HVDC Technology for 7th Offshore Wind Farm in German North Sea

Siemens Energy, an energy arm of German multinational conglomerate Siemens AG, has been supplying high-voltage direct-current (HVDC) power transmission technology for the seventh offshore wind farm connection in the German North Sea.

August 12, 2020. By Manu Tayal

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Siemens Energy, an energy arm of German multinational conglomerate Siemens AG, has been supplying high-voltage direct-current (HVDC) power transmission technology for the seventh offshore wind farm connection in the German North Sea.

In this regard, a corresponding contract was signed between the German-Dutch network operator TenneT and the BorWin5 Offshore Consortium, consisting of Siemens Energy and Dragados Offshore.

As per the deal, Siemens Energy will supply 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.

Commenting on the development, Beatrix Natter, Executive Vice President of the Transmission Division at Siemens Energy, said that “we are especially pleased that we can again join with TenneT to make an important contribution to the decarbonization of Germany’s energy supply. The seventh order in the German North Sea underscores the great confidence in our HVDC technology.”

“When DolWin6 and BorWin5 begin operation, we’ll have installed a total transmission capacity for 5.6 GW of wind power in the German North Sea. This could supply around 7 million German households with green electricity,” Natter added.

Besides, the consortium’s scope of supply includes construction and installation of the offshore platform in North Sea and converter station on land.

This offshore converter station will convert 3-phase alternating current produced by wind turbines into DC with a voltage of ±320 kilovolts (kV) for low-loss transmission to land.

However, the shoreside converter station in Garrel/Ost will then convert the electricity back into 3-phase alternating current for feeding into Germany’s power grid.

The platform BorWin epsilon, which is part of the BorWin5 project, is expected to begin the low-loss transmission of electricity in 2025, which is produced by the EnBW He Dreiht wind farm off the island of Borkum to the Garrel/Ost converter station around 230 kilometers distant.

Meanwhile, the transmission capacity of 900 MW is calculated to serve over 1.1 million households with electricity. Also, this project is a further contribution towards decarbonizing Germany’s energy supply, and BorWin5 marks the 7th HVDC offshore grid connection project undertaken by the company in Germany with TenneT.

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