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completed on 4 September after a 12-day campaign, installation of TenneT’s 900-megawatt DolWin kappa offshore converter station – including piling of jacket foundations.

Comprising an approximately 5,000-tonne foundation jacket and 11,000-tonne topsides housing high-voltage direct current (HVDC) technology, Allseas again demonstrates the ability to execute technically challenging offshore projects.

All components were installed directly from Pioneering Spirit, using both the topside and jacket lift systems. In another first for Allseas, the 5,000-tonne special purpose crane was deployed to drive the 10 foundation piles up to 68 metres deep into the seabed to secure the foundation jacket.
The installation of DolWin kappa is key to unlocking additional North Sea wind energy capacity, advancing offshore grid expansion in support of Europe’s energy security. TenneT’s DolWin6 connection will provide more than 1 million homes with renewable energy when it comes on line in 2023.