DolWin4 & BorWin4

GRID CONNECTION IN SOUTHERN EMSLAND

The DolWin4 and BorWin4 grid integration systems bring offshore wind energy from the North Sea to Lingen in southern Emsland. From the wind farms to the coast, the connections are run as submarine cables and pass under the island of Norderney. On land, the systems are realised as underground cables.

Amprion’s Hanekenfähr substation is located in Lingen in southern Emsland. This used to connect the Emsland nuclear power plant to the transmission network. After the power plant was shut down in 2023, service capacities totalling 1.4 gigawatts were freed up at this major grid node. In future, this capacity will be used to transport wind power to the consumption centres in the west and south of Germany.

COMMISSIONING 2028

These two planned offshore connection systems will be installed parallel to each other on land and for the most part out at sea, too. DolWin4 is a connection that stretches around 215 kilometres, some 60 kilometres of which will be at sea. BorWin4 has a total route length of around 280 kilometres, around 125 kilometres of them offshore. Onshore, both DolWin4 and BorWin4 are planned as underground cables using direct current technology. They can each transmit 900 megawatts of electricity. In total, this corresponds to the demand of a large city like Hamburg with 1.8 million inhabitants. The connection systems will go into operation in 2028.