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AlstomBaltic2Alstom has completed the commissioning of the Alternate Current (AC) offshore substation for the German utility Energie Baden-Württemberg (EnBW) in the windpark EnBW Baltic 2. The wind farm hosts 80 wind turbines feeding up to 288MW into the grid.

The offshore substation transmits the electrical energy from the wind turbines to the onshore connection point of the network in Bentwisch near Rostock via a 150 kV-submarine cable. The turnkey contract managed by Alstom included the technical development, design and supply of the electrical components, platform construction, transport as well as the offshore installation of a high voltage offshore substation. With a combined weight of 4,400 tonnes, the platform was placed on a pre-installed jacket and brought out to the installation site in the Baltic Sea, with waters as deep as 44 metres. The buoyant and self-erecting platform design enabled a high degree of flexibility and independency from crane ships for the transport and installation of the offshore substation.

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