Denmark and Belgium to connect energy islands with undersea cable

Published on 03.01.2022

Grid operators Elia (BE) and Energinet (DK) will collaborate on the creation of the world's first undersea connection between two energy islands, exchanging power between two countries while transferring energy from offshore wind farms to land. The Danish Climate and Energy Minister, Dan Jørgensen and the Belgian Energy Minister, Tinne van der Straeten, signed an agreement to build an interconnector between their energy islands at WindEurope’s annual event Electric City. The German State Secretary at the Ministry for Economic Affairs and Energy, Andreas Feicht, also signed an agreement with the Danish Minister to connect the Danish island of Bornholm to the German grid.

The cooperation between Energinet and the German grid operator 50Hertz is also continuing by signing a memorandum of understanding for the preparation of a second hybrid interconnector in the Baltic Sea. The cables would be connected to offshore wind farms via the danish island of Bornholm. The project is now being further substantiated.

Elia and Energinet are leading system operators in the development, construction, and operation of high-voltage marine infrastructure. Both are experienced in subsea HVDC interconnectors (high voltage direct current) but accelerating with this project. A preliminary study shows that the project will be technologically ambitious but feasible. Once realised, the Belgo-Danish project will lead to an annual reduction of 4 megatonnes of CO2. Elia and Energinet are now going to concretise the plans and map out possible routes, landing points, and placement of conversion stations. The project could be completed by 2030. The construction itself will take about four years.

WindEurope CEO Giles Dickson said: “Offshore wind is entering a new era. Connecting offshore wind projects to more than one country will improve electricity flows across Europe. By pooling generation and transmission infrastructure, these “hybrid” offshore wind farms reduce costs and save space. Today’s announcement from the Elia Group is good news for Belgium, Denmark and Germany – and for all of Europe. We will need many more of these hybrid projects.”

Find more information about the project on Elia’s website.