Having taken a final investment decision for the 342-MW Kaskasi offshore windfarm, innogy has signed contracts with a number of main suppliers for the project
As previously highlighted by OWJ, the contracts include Siemens Gamesa Renewable Energy, who will supply the turbines for the windfarm. Contracts have now also been signed with Bladt Industries and Seaway 7.
innogy SE senior vice president renewables operations offshore Sven Utermöhlen said, “Following our success in the German offshore auction in 2018, we have now taken the next important step in realising the Kaskasi offshore windfarm. With Siemens Gamesa, Bladt Industries and Seaway 7 we have brought extremely experienced contractors and suppliers on board for all of the key components and their installation, which is expected to start next year.”
innogy signed a contract with Siemens Gamesa Renewable Energy for the supply of 38 SG 8.0-167 DD Flex offshore wind turbines. Each turbine will have a capacity of close to 9 MW.
The wind turbines as well as the substations will be installed on monopile foundations built by Bladt Industries. Seaway 7 will commence installation of the foundations using a new installation method in Q3 2021, in water depths of 18 m to 25 m.
The company will use ‘vibro pile driving’ rather than a conventional pile-driving technique.
A research project led by innogy has shown this installation method can reduce installation times and noise levels during construction.
Kaskasi will be the first offshore windfarm in the world using the vibro driving technique to install all of the monopile foundations. In preparation for the offshore construction work, extensive seismic analysis has already been carried out.
innogy has also contracted Bladt Industries to construct, deliver and commission the offshore transformer substation. The wind turbines will be connected to the Kaskasi substation via 33-kV subsea cables. Installation of approximately 50 km of cable will be carried out by Seaway 7. The cables will be manufactured by the Dutch company Twentsche Kabel Fabriek.
It is expected that the windfarm will enter operation mid-2022. The final date will be set in co-ordination with the offshore grid operator TenneT.