TenneT takes over BorWin3 connection

BorWin3 © TenneT

The 900 MW BorWin3 DC offshore grid connection in the German North Sea, off the coast of Borkum, has been handed over to TenneT following a succesfull trial operation period of six weeks.

A consortium of Siemens and Petrofac were awarded the project contract in 2014, which included the engineering, procurement, construction, transport and installation of the platform offshore. Siemens was also responsible for the onshore converter in Emden/Ost.

The onshore convertor station has technically been ready since 2018. The offshore converter station was built in Dubai and installed offshore in October 2018. Prysmian was responsible for the installation of the DC cables. The cables had already been finally approved in March 2019. The connection has been ready for feed-in since August 2019.

The overall distance of the connection is 160 km. The power collected from the wind farms EnBW Hohe See (500 MW) and the Global Tech I (400 MW) is first transported ashore to Hamswehrum via a 130 km long submarine cable west of Borkum and from there transmitted to Emden/Ost via a 30 km long land cable.

The BorWin3 connection brings the total offshore transmission capacity for TenneT in Germany to 7,132 MW. This is higher than the target set by the German government (6.5 GW).

 

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