EnBW officially commissions Baltic 2

Thursday, 24 September, 2015 - 11:15
Baltic 2's yellow substation is 15 m high, 25 m long and weighs a total of 4,500 t, including foundations. (Photo: EnBW)
Baltic 2's yellow substation is 15 m high, 25 m long and weighs a total of 4,500 t, including foundations. (Photo: EnBW)

EnBW has officially commissioned its second offshore wind farm in the Baltic Sea, Baltic 2. After two years of construction, EnBW Baltic 2, which comprises 80 wind turbines, will now generate electricity for approximately 340,000 households annually.

On 21 September, EnBW AG celebrated the official commissioning of its offshore wind farm Baltic 2. One of the guests was the Prime Minister of Mecklenburg-Vorpommern, Erwin Sellering. The 288-MW wind farm consists of eighty Siemens SWT-3,6-120 turbines and will provide electricity for approximately 340,000 households.

"We are expanding renewable energies to make them one of the main pillars of our business," EnBW Chairman of the Board Frank Mastiaux said in his welcoming address. "The commissioning of EnBW Baltic 2 clearly shows that the remodelling of the energy supply system towards decentralisation and renewable energies is irreversible. We will build upon this success over the next few years when we begin work on further offshore wind farm projects. Our project pipeline currently includes three further offshore wind farms in the North Sea with a total output of 1,600 MW."

Erwin Sellering, Prime Minister of Mecklenburg-Vorpommern, explained: "The expansion of offshore wind energy is crucial for the major national challenge that Germany is currently facing: the energy turnaround. Wind turbines at sea are very suitable for delivering baseload power because they continue to generate electricity when wind conditions elsewhere are calm."

Baltic 2 is the second successful offshore project for EnBW as well as for the grid operator 50Hertz. "This is the second offshore wind farm in the Baltic Sea that we have connected to the grid, and together with our partner EnBW, we are demonstrating that the development of offshore power is feasible. The past few years have shown that this is an enormous technological and logistical challenge," said Boris Schucht, chairman of management at 50Hertz.

The eighty wind turbines at Baltic 2 rise 138 m above the surface of the water. Different foundations were used, depending on the depth of the water: Monopiles were used in water depths up to 35 m, and three-legged jackets were used in depths over 35 m. The electricity from the individual wind turbines is transmitted to the substation where it is ramped up to a higher voltage and then relayed to the mainland. From there, it is fed into the integrated German electricity grid. More than 83 km of undersea cable connect the individual wind turbines to the substation.

Katharina Garus

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