Wedoany.com Report-Aug. 29, Denmark’s NKT has successfully completed the installation of a 320 kV high-voltage direct current (HVDC) power cable system for the 900 MW BorWin5 offshore grid connection in Germany. The final pull-in work to the offshore platform was conducted using NKT’s specialized vessel, NKT Victoria.
Under a contract signed in 2020 with TenneT, the Dutch/German offshore transmission system operator, NKT was tasked with delivering and installing 230 kilometers of 320 kV HVDC power cables. The BorWin5 project, with a total length of 230 kilometers, connects the offshore converter platform BorWin epsilon, installed by Allseas in the German North Sea in May 2025, to the mainland.
The system facilitates the transmission of electricity generated by the He Dreiht offshore wind farm. At the BorWin epsilon platform, the three-phase current is converted into direct current and transported via an approximately 120-kilometer sea cable to the landfall at Hilgenriedesiel. From there, 110 kilometers of underground cable carry the electricity to a future converter station in Garrel/Ost, located in the Cloppenburg area.
A TenneT representative stated: “The completion of the cable installation by NKT marks a significant milestone in ensuring reliable and efficient energy transmission from offshore wind farms to the mainland, supporting Germany’s renewable energy goals.” This reflects the project’s importance in advancing sustainable energy infrastructure.
The BorWin5 grid connection is expected to be fully commissioned by the end of 2025, enabling the integration of renewable energy into Germany’s power grid. The project enhances grid reliability and supports the transition to clean energy by efficiently transporting wind-generated electricity from the North Sea to consumers on the mainland.
NKT’s expertise in high-voltage cable systems and its collaboration with TenneT underscore its role in advancing offshore wind energy infrastructure. The successful installation of the BorWin5 cable system strengthens Germany’s capacity to harness renewable energy, contributing to sustainable development and energy security in the region.
