Dutch AndDanish Grid Operators Agree On North Sea Wind Plan

Dutch grid operator TenneT and Denmark’s Energinet have agreed to further developing a large renewable European electricity system in the North Sea. The agreement calls for installing a high-voltage direct current submarine cable, COBRAcable, interconnecting the electricity grids of the two countries.

Safeguarding the security of supply is very important to both countries. The COBRAcable will make Dutch capacity structurally available to the Danish electricity grid, and vice versa.

The connection will be designed in a way that enables the connection of an offshore wind farm at a later stage. This will contribute to the realisation of a sustainable international energy landscape, a key aim of the European Union. 

Climate goals 2050

The plan was first unveiled in June 2016 and provides the basis for a joint European approach up to the 2050 climate goals formulated in the Paris Agreement (COP21),and focuses specifically on developing the North Sea as a source of, and a distribution centre for Europe’s energy transition.

Other partners

Discussions with other potential partners are ongoing. The plan centres on the construction of one or more islands with interconnections to surrounding countries in the middle of the North Sea area of Dogger Bank. These axes would be connection points for wind farms, allowing electricity to be distributed and transmitted over direct current lines to the Netherlands, Denmark, Germany, Great Britain, Norway and Belgium, enabling trade of the electricity between these countries. 


The COBRAcable will have a capacity of about 700 MW, will be around 325 kilometres long, and will run from Eemshaven (the Netherlands) to Endrup (Denmark) via the German sector of the North Sea. Two onshore converter stations – one in the Netherlands and one in Denmark – are needed to connect the cable to the existing grids.  ‘This project can significantly contribute to a completely renewable supply of electricity in northwest Europe,’ said TenneT CEO Mel Kroon. Trading electricity will be enabled by these wind connectors.

See more about TenneT and Energinet.