Butendiek Offshore Wind Farm, Germany
The 288MW Butendiek Offshore Wind Farm will be situated 32km west of the island of Sylt in the North Sea area of Germany. Siemens Financial Services, Marguerite Fund, Industriens Pension and PKA each own a stake of 22.5% in the project. WPD, the developer of the project, owns the remaining ten percent stake.
Offshore construction work on the project is scheduled to begin in 2014. The construction of the project is expected to be completed in June 2015. The €1.3bn ($1.7bn) project is expected to generate 1,290GWh of power per year upon its completion, which will meet the electricity needs of 370,000 households.
Butendiek Offshore Wind project location
The Butendiek Offshore Wind power project site covers an area of 42km² in the German Exclusive Economic Zone Water of North Sea, close to the Danish-German border. The water depth at the project location varies from 19m to 22m. Besides attractive wind resources, the soil condition at the site is stated to be favourable.
German wind farm history and funding
The WPD group started developing the project after it had acquired 100% of Butendiek Offshore Windpark Holding, from SSE Renewables, in September 2010.
Negotiations on the design, production, delivery and installation of the project were completed in 2011. Major supply contracts were also secured by September 2011.
The implementation of the Butendiek Offshore Wind project has become more certain following the agreement reached in February 2013. The project will be financed through 67% debt and 33% equity.
The debt financing of the project will be provided by a consortium led by UniCredit, KfW Ipex and Bremer Landesbank. A consortium of lenders, involving the European Investment Bank (EIB), KfW Förderbank, Denmark's Eksport Kredit and nine other commercial banks, are providing €937m ($1.2bn) of loans to the Butendiek project. EIB alone is contributing €450m ($602m) for the project.
Siemens Financial Services, Marguerite Fund, Industriens Pension, PKA and WPD will provide equity financing for the project.
Turbines supplied by Siemens
The Butendiek Offshore Wind Farm will consist of 80 three-bladed Siemens wind turbines each having a rated output of 3.6MW. The turbines will be mounted on tapered tubular steel towers.
The rotor diameter of each turbine will be 120m. The rotor speed will be variable and will maximise the aerodynamic efficiency. The power output of the rotor will be guided by pitch regulation.
Each blade of the turbines will be 58.5m in length. The other components of the turbine include a microprocessor-based wind turbine controller, a 3,600kW asynchronous generator and a three-stage planetary / helical gear box.
Each turbine tower will be grounded upon a monopile foundation. Ballast Nedam's Heavy Lift Vessel (HLV) Svanen will be used for installing the foundations.
Butendiek Offshore Wind Farm contractors
The Dutch-German transmission grid operator TenneT TSO will connect the wind farm with the grid through the SylWin-Cluster.
Siemens has been awarded a contract worth €700m ($937m) to supply and install 80 SWT-3.6-120 wind turbines for the offshore wind power plant. The contractual scope also includes long-term maintenance support for ten years.
A contract worth more than €250m ($334m) has been awarded to Ballast Nedam for the engineering, supply and installation of turbine foundations of the offshore wind farm.
Fabricom GDF Suez JV of Belgium will deliver the offshore substation platform for the wind power project. The inter-array cabling of the project will be provided by Visser Smit Marine Contractor, a company based in Netherlands.
Amrumbank West is a 288MW offshore wind farm being developed in the North Sea, Germany. It is located 35km north of Helgoland and 37km west of Amrum.
BARD Offshore I is a 400MW offshore wind farm, its construction began in March 2010.