Alstom Grid and WeserWind get Baltic 2 substation work

German utility EnBW has hired Alstom Grid and its ever-more-frequent partner WeserWind to build and install the offshore substation for its second offshore wind farm – the 288MW Baltic 2.

The substation will harness the electricity generated at 80 Siemens 3.6MW turbines set 35km into the Baltic Sea, before stepping up the voltage from 33kV to 150kV and flowing it back to Rostock, Germany.

Alstom will design and manufacture the electrical components, while Bremerhaven-based WeserWind, which is owned by German steel processor Georgsmarienhütte, will handle the structural elements and subsea foundations.

The substation will be as tall as a three-storey building and weigh some 2,500 tonnes – equivalent to 200 two-axle buses – upon its completion in late 2012.

The deal marks the third offshore substation contract Alstom Grid and WeserWind have won in tandem this year. In August they nabbed work at WindMW’s Meerwind project and in February they were awarded a contract by Trianel for Borkum West 2 – both projects being located in the North Sea.

A major player in the global electricity transmission market, Alstom entered the wind space with a splash last year via its 2010 acquisition of Areva T&D, which has worked on projects like Alpha Ventus.

WeserWind, a foundation specialist, worked with ABB at EnBW’s Baltic 1 before entering its collaboration with Alstom.

EnBW has wrapped up most of the major supply-chain agreements for Baltic 2. As with Baltic 1, Siemens has signed on to supply turbines – moving from its 2.3MW to its 3.6MW model.

In August EnBW handed a €382m ($515.5m)contract to a consortium comprising Hochtief and Belgium’s DEME to design and install the foundations and turbines.