The commissioning of the Klixbüll - Endrup Interconnector will increase the physical exchange of power between Denmark and Germany. The exchange of power over this new transmission line will increase the security of supply and system stability for both power grids. Furthermore, the exchange of renewable energy, especially wind power, between the two countries will be enhanced. In addition, the realisation of this project brings obvious socioeconomic benefits for both Denmark and Germany and majorly contributes to facilitating European market integration.

With these aims, the project is in line with the European Commission’s objectives for an integrated energy market through cross-border projects that link the energy systems of EU countries. The implementation of the project will thus help to ensure affordable, secure and sustainable energy for all citizens and facilitate the transmission of renewable energies to centres of consumption in Europe.

The project in Germany

• The German section is approximately 18 kilometres long, running from Klixbüll near Niebüll to the crossing point at the German-Danish border near Tønder.
• The interconnection will be established as a 400 kV AC overhead line with two circuits.
• In Germany, the line will be connected to the Klixbüll substation constructed in the frame of the fourth section of the West Coast line.

Learn more about the German part of the project on the TenneT website.
On the website, you can also read news about the project. The website is in German.

The project in Denmark

• The Danish section of the interconnection is approximately 75 kilometres long, running from Endrup to the crossing point at the German-Danish border near Tønder.
• The interconnection will be established as a 400 kV AC line with two circuits - 60 km overhead line and 15 km underground cables.
• In Endrup, the line will be connected to an existing substation.

Learn more about the Danish part of the project on the Energinet website.
On the website, you can also read news about the project. The website is in Danish.

The Border Crossing Point 

In December 2019, Energinet and TenneT have agreed on a proposal for the border crossing point. It means that the location has been defined where the new transmission line shall cross the German-Danish border.

See the border crossing point from the Danish side of the border here

See the border crossing point from the German side of the border here

Project timeline

2017
Cooperation agreement between TenneT and Energinet

2018
Public consultations in Germany and Denmark
Environmental investigations in Denmark start

2019
Proposal for cross border area

2020
Final proposal of route in Denmark
Announcement of planning corridor in Germany
Further public consultations in Germany and Denmark
Submission of Plan approval documents and start plan approval process in Germany

2022
Approval obtained from planning authorities in Denmark
Right of way obtained in Denmark
Approval obtained in Germany
Construction in Germany starts

2023
Construction in Denmark starts
End of line construction in Germany

2024
End of line construction in Denmark
Line commissioning