The connection’s offshore platform is about 70km west of the island of Sylt. It links the DanTysk, Butendiek and Sandbank wind farms to the shore.
The three wind farms, each with a capacity of 288MW, will feature 232 Siemens turbines.
Siemens already has over 100 wind turbines linked to the grid connection.
A capacity of 350MW has already been transmitted through the SylWin1 link under optimal wind conditions.
Electricity is transmitted by means of over 200km of subsea and underground cable link to an onshore substation at Buttel in northern Germany.
Siemens Energy Management Division CEO Jan Mrosik said: "This year we have completed the world’s first three offshore grid connections with efficient direct-current technology – SylWin1, BorWin2 and HelWin1.
"We also intend to put the fourth project HelWin2 into commercial operation as planned in the coming weeks."
The German-Dutch transmission grid operator TenneT is planning to complete further offshore grid connections by the end of the year.
TenneT intends to build over 5GW of connections for German wind farms, which it will help the government to meet offshore wind target of 6.5GW by 2020.
The operator plans to grid-connect 3.45GW of Dutch offshore wind energy by 2023.
Image: The offshore platform of SylWin1 HVDC grid connection will link the DanTysk, Butendiek and Sandbank wind farms to the shore. Photo: courtesy of Siemens.
