Marine construction specialist Allseas has won a contract to install the high voltage direct current (HVDC) converter platforms for the DolWin4 and BorWin4 offshore grid connection projects in the German North Sea.
Awarded by Dragados Offshore, the deal covers the transport and single-lift installation by the 2014-built heavy lift vessel Pioneering Spirit of two 900 MW converter stations for the transmission of wind-generated power.
of two 900 MW converter stations for the transmission of wind-generated power.DolWin4 and BorWin4 are the first offshore grid connection systems to be developed by German transmission system operator Amprion. Dragados Offshore is responsible for delivering the two platforms, with partner Siemens Energy providing the HVDC technology.
Both platforms will be built in Cadiz, Spain, and transported by the Allseas cargo barge Iron Lady to Rotterdam for transfer to Pioneering Spirit with installation set for 2027. The structures comprise topsides weighing approximately 12,500 tonnes, supported by 7,000-tonne and 8,000-tonne jackets. Dragados earlier tapped the Switzerland-headquartered company for the installation of converter platforms for the DolWin6 and BorWin5 offshore wind farms.
