TenneT has awarded Jan De Nul Group, LS Cable & System, and Denys NV a 525 kV high voltage direct current (HVDC) cable system portfolio for the German electricity grid. The combined DC cable length of the awarded portfolio is almost 2000 km.

The portfolion involves BalWin 4, LanWin 1, and LanWin 5, which are cable systems consisting of both offshore and onshore sections, and the NordOstLink, which is an onshore cable system.

TenneT is heavily investing in the grid connections of offshore wind farms for both the Dutch and German energy grid, for which these cable system packages are designed. BalWin 4 and LanWin 1 will connect to the Unterweser area, LanWin 5 to Rastede. All grid connections will have a capacity of 2 GW each and will be operational respectively by 2029, 2030, and 2031.

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Jan De Nul contracted for offshore cables

The three partners in the consortium all bring their own expertise to the stage: LS Cable & System as expert cable designer and manufacturer, Jan De Nul as expert in offshore cable installation and Denys as expert in onshore cable installations.

Philippe Hutse, Director Offshore Division at Jan De Nul Group: ‘From the very start, we embraced TenneT’s new approach in which cooperation and transparency is key. The resulting multi-year framework agreement gives us the much-desired planning security, which we and the offshore energy industry have been strongly requesting for quite some time.’
Jan De Nul will transport, install, and protect all offshore cable sections.

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Jan De Nul’s scope includes the transport, installation, and protection of the cables in the Wadden Sea, nearshore, and offshore sections for the cable system packages of BalWin 4, LanWin 1 and LanWin5. The offshore operations will start in 2026.

Picture: Jan De Nul’s CLV Connector, CLV Isaac Newton, and TSV Symphony preparing for new projects.

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