[Japan] TEPCO Renewable Power Joined an Offshore Wind Demonstration Project

On February 4, 2021, TEPCO Renewable Power (TEPCO RP, Headquarters: Tokyo) announced that it has joined Denmark’s TetraSpar Demonstrator, a demonstration project for testing the TetraSpar floating offshore wind foundation. The project was jointly launched by RWE Renewables (RWE, Headquarters: Essen, Germany), a leading renewable energy solutions provider; Shell New Energies (Shell, Headquarters: The Hague, Netherlands); and Stiesdal Offshore Technologies (SOT, Headquarters: Odense C, Denmark), a Danish company that develops wind power technologies. TEPCO RP will own a 30% share of the TetraSpar Demonstrator.

The project has assembled the TetraSpar floating offshore wind turbine foundation at the port of Grenaa in Denmark. TEPCO RP will contribute its efforts to the project by providing its technical knowledge from the electric power business that Tokyo Electric Power (TEPCO, Headquarters: Tokyo) has developed over the years.

The wind turbine foundation is comprised of a tubular steel pipe and a floating keel. The tubular pipe was manufactured by Welcon (Headquarters: Give, Denmark). The pipe was delivered to the port of Grenaa, Denmark in the summer of 2020 and was assembled on the site in less than two months. It was assembled quickly because TetraSpar does not require specific processes such as welding at the time of assembly, and because the project has validated the assembling and manufacturing method. Compared to other floating wind turbines, it is likely that the TetraSpar design concept has an advantage in simplifying the manufacturing, assembly and installation processes and reducing costs.

The project plans to mount the wind turbine on the foundation and then test it at the Marine Energy Test Centre (Metcentre) near Stavanger, Norway, where it will be fixed to the seabed with three anchor lines and connected to the power grid. The turbine is expected to start its operations in the summer of 2021. It will have an output of 3600 kW. The four companies hope that the project will: provide them with experience and knowledge in offshore wind turbine construction, installation, and operation; that it will refine the TetraSpar technology; and that the project will help to expand the use of offshore wind power.[1]

[1] https://www.tepco.co.jp/rp/about/company/press-information/press/2021/1572776_19679.html