Tideway, the offshore division of DEME, has completed the installation of 467km export cable at Ørsted’s Hornsea Project One offshore wind farm in the UK.
This is the longest AC offshore wind cable installed so far, equivalent to the distance between Amsterdam and Hamburg.
The cable manufacturing and installation have been completed months ahead of schedule.
Expected to be fully operational in 2020, the 174 turbines of the Hornsea Project One will generate clean electricity for more than one million homes.
The world’s largest offshore wind farm was the first project for the company’s new cable installation and multifunctional vessel, Living Stone.
With 10,000-tonne cable capacity and dual-lane cable system, Living Stone improves cable installation production rates.
The installation scope included laying export cables from three offshore substations located up to 120km offshore to the shore via a Reactive Compensation Station, and the installation of two interlink cables.
Tideway also took up removal of boulders, pre-sweeping and cable pull-in to the substations, and is now completing crossing installation and cable burial.
After the installation at Hornsea Project One, Living Stone will be used for subsea cable installation for Elia’s Modular Offshore Grid in the Belgian sector of the North Sea.
The ‘electricity plug’, including an Offshore Switchyard Platform, will be connected to four wind farms. Submarine cables will link the platform with a substation in Belgium, where the wind power will be fed to the Belgian onshore grid.
DEME, the Belgian dredging, environmental and marine engineering group, implements complex marine engineering works.
The company has moved into several related sectors, including the financing of marine engineering and environmental projects, executing complex EPC-related marine engineering projects, such as civil engineering works, the development and construction of renewable energy projects, providing services for the oil, gas and energy sector, decontaminating and recycling of polluted soils and silts, and the harvesting of marine resources.
Image: Tideway installs longest offshore wind export cable at Hornsea One, UK. Photo: Courtesy of DEME.