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DeepOcean completes WindFloat Atlantic export cable work

By: Tom Russell 26/09/2019 DeepOcean

Cables General

DeepOcean has completed export cable installation for the WindFloat Atlantic floating wind farm project on behalf of Hengtong Group. The scope of work included project management, engineering and execution of all marine activities associated with the installation of an 18km static and dynamic submarine cable.

DeepOcean performed route engineering, free-span analysis, and a burial risk assessment before engineering an installation and protection solution for seabed conditions. This comprised pre-lay rock bag installation, post-lay rock placement plus the application of Tekmar and First Subsea cable protection systems in rocky seabed areas. DeepOcean’s T1 Trencher, modified to include a new three-metre jet trenching package, was deployed in areas of sufficient seabed sediment.

The WindFloat Atlantic project is to consist of three MHI Vestas V164-8.0 MW, each with a capacity of 8.33 MW, mounted on floating semi-submersible platforms. The project is owned by ENGIE, Repsol, EDP Renováveis, Principle Power, Inc. and is located approximately 20km off the coast of Portugal.

Each foundation platform’s mooring system is made up of three catenary mooring lines, connected to drag embedded anchors. The technology was implemented in a first of its kind prototype called WindFloat 1 near Póvoa do Varzim which was installed back in 2011. The project was a full life cycle demonstration, featuring a Vestas V-80 2MW turbine, and was decommissioned last year.

A commercial phase of approximately 30 turbines producing 150MW is planned to follow 25MW project. The WindFloat foundation is also due to be deployed at the Golfe du Lion project in the Mediterranean. The project developers anticipate reaching consent this summer, with commercial operations starting in 2021.

For more information on floating wind projects, click here.

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DeepOcean completes WindFloat Atlantic export cable work

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