Substation for offshore wind farm Borkum has been completed

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Alstom has delivered the offshore transformer station for the Trianel wind farm Borkum in the North Sea and handed it over to Trianel Windkraftwerk Borkum GmbH & Co. KG. The offshore installation of the platform, which was manufactured in Kiel, was successfully completed.

The transformer platform, which is as large as a house, has two decks which accommodate transformers for the transformation of the electricity generated in wind turbines as well as equipment for its own power supply. In addition to the technical development and construction process, the contract also included electrical components such as the gas-insulated switchgear of type F35 and two 225-MVA transformers for the platform from Alstom. The 180 meter-long installation ship Oleg Strashnov, owned by the Dutch company Seaway Heavy Lifting, was commissioned with the installation. Using the on-board 5,000-tonne-crane, the platform was lifted to about 20 m above sea level and then welded to the substructure.

"With this transformer platform, we have not only installed the "wall socket" for the wind farm, but also laid the foundation for the next stage of construction," says Klaus Horstick, Managing Director of Trianel Windkraftwerk Borkum GmbH & Co. KG, speaking about the current status of the project. "In the coming months, we will set up the wind turbines."

"In addition to the successful installation of the Trianel wind farm Borkum, the installation of Global Tech 1 is just around the corner. The steel shells of the offshore substations Baltic 2 and Meerwind are also currently under construction. This clearly demonstrates our leading position in this field," says Wolfgang Voss, Grid Director at Alstom Deutschland AG.

Just recently, at the end of February, the transmission system operator TenneT had also awarded the DolWin3 project to Alstom. The project has a total investment volume of more than € 1 billion. As the general contractor, Alstom will supply and build both the offshore and onshore converter stations and the connecting DC cables. Alstom will deliver a turnkey grid connection.

Trianel wind farm Borkum

The Trianel wind farm Borkum, with a surface area of 56 km2, is located about 45 km north of the coast of Borkum. During two construction phases, 80 wind turbines with a total capacity of 400 MW will be installed in water depths of between 25 and 35 m. The first construction phase with 200 MW will be completed by the end of the year.

Trianel is building the wind farm in cooperation with 33 municipal utilities and municipal energy suppliers from Germany, Austria and Switzerland. Trianel wind farm Borkum is the first municipal offshore wind farm in the North Sea. The total investment for the first and second stage of the wind farm is around € 1.6 billion.

Katharina Garus

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