The 1,400-tonne offshore substation topside has been installed at the Kaskasi offshore wind farm in the German North Sea.

Kaskasi is RWE’s sixth wind farm off the German coast, the 342-megawatt project is being built 35 kilometres north of the island of Heligoland.

The journey of the 1,400 tonne substation topside started in Danish Aalborg at the manufacturing facility of Bladt Industries and took two days to ship across the North Sea. Gulliver, a Floating Heavy Lift Vessel of SCALDIS, placed the substation onto the monopile foundation, completing the installation of the heaviest component of the Kaskasi offshore wind farm.

To install the foundations into the seabed at depths of 18 to 25 metres, RWE is utilising two installation methods: conventional hammering and innovative vibro pile driving technology, which has the potential to reduce underwater noise emissions. This benefits the marine environment in particular. The pilot implementation of the vibro technology at Kaskasi is accompanied by the “VISSKA” research project, which is funded by the German Federal Ministry of Economic Affairs and Climate Action.

“If Germany wants to supply itself almost entirely with electricity from renewable energies by 2035, this will require a huge effort. Faster offshore expansion is particularly important to simultaneously achieve the climate targets and more energy sovereignty. We want to help make this happen and the fact that construction of our Kaskasi offshore wind farm is now picking up pace is a clear sign of this.”, said Sven Utermöhlen, CEO Wind Offshore, RWE Renewables.

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