Electrical interconnectors in the North Sea

NorNed is a long high-voltage direct current submarine power cable between Feda, Norway and the seaport of Eemshaven in the Netherlands, which interconnects both countries' electrical grids. It was once the longest submarine power cable in the world. Budgeted at €550 million, and completed at a cost of €600m, the NorNed cable is a bipolar HVDC link with a voltage of ±450 kV and a capacity of 700 MW. NorNed is a joint project of the Norwegian transmission system operator Statnett and its Dutch counterpart TenneT. The cable system itself and the two converter stations were produce

subsea high-voltage direct current electricity cable transmission line between Norway and Great Britain

NordLink is a subsea 1,400 megawatt (MW) HVDC power cable between Norway and Germany, opened in May 2021. The long line operates at a voltage of 500 kV DC. It consists of 54 kilometres long land cable in Schleswig-Holstein, Germany, a 516 kilometres long submarine cable between Germany and Norway and a 53 kilometres long overhead line with 140 towers in Norway.

HVDC transmission lines between Denmark and Norway

BritNed is a 1,000MW high-voltage direct-current (HVDC) submarine power cable between the Isle of Grain in Kent, the United Kingdom; and Maasvlakte in Rotterdam, the Netherlands.

Submarine power cable between the UK and Denmark

NorGer was one of two planned electricity cables between Germany and Norway. The other proposed project was NordLink, which Statnett decided to proceed with in 2015, and NorGer was cancelled.

COBRAcable (COpenhagen-BRussels-Amsterdam cable) is a ±320 kV, 700 MW HVDC submarine power cable pair between Eemshaven, the Netherlands and Endrup near Esbjerg, Denmark. The cable is jointly owned by Energinet.dk and TenneT. Its purpose is to improve the European transmission grid and thus increase the amount of variable wind power in the system while improving supply reliability. Its 700 MW capacity corresponds to an annual transmission capacity of 6.1 TWh.

HVDC interconnector between Belgium and the United Kingdom