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REpower Systems AG this week erected the last of a total of six REpower 5M wind turbines for the alpha ventus offshore test field. Alpha ventus is located 45 kilometers north of the island of Borkum and was built by a consortium of companies including EWE, E.ON, and Vattenfall.
Each of the six turbines constructed at alpha ventus is slated to supply the electricity grid with around 18 million kilowatt hours (kWh) of power per year.
It took only a few weeks to erect the six REpower wind turbines, each with a rated output of 5 megawatts (MW) and a height of 155 meters from sea level to the tip of the turbine blade.
"Despite the partly adverse weather conditions of the last few weeks, this turbine construction project went quickly and smoothly – due to the experience that we gained from similar wind turbine construction projects, such as the Thornton Bank offshore wind farm," said Norbert Giese, director of offshore projects at REpower Systems AG.
Unlike the construction of the Belgian offshore wind farm Thornton Bank, REpower worked with a larger transport jack-up barge this time so that one complete turbine – made up of rotor star, nacelle, and two tower components – could be shipped to the location at a time. Each of the six turbines constructed at alpha ventus is slated to supply the electricity grid with around 18 million kilowatt hours (kWh) of power per year.
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