The DolWin Beta is the world’s largest capacity high voltage direct current (HVDC) offshore converter platform and when in service, the unmanned platform will be remotely controlled and managed.
The platform is one of the main components of TenneT’s 900 mw dc offshore grid connection DolWin2 which will connect large offshore wind farms in the North Sea.
TenneT is the grid operator for the Netherlands and a large part of Germany.
The mammoth structure weighing approximately 23,000 tonnes is around 100m long, 70m wide and 90m in height. Last December, the topside consisting of operational compartments for the electrical equipment and living quarters and weighing about 10,000 tonnes was lifted in one piece at Drydocks World, creating a world record for heavy lifts.
The DolWin Beta has been built for a large wind farm cluster in the German sector of the North Sea and will be located 45 kilometres off the coast. The platform will have a generating capacity of more than 900 mw, enough to light up a major city such as Frankfurt. It will receive alternating current from several wind farms with more than 200 wind turbines and convert it into direct current before sending it onshore via subsea cables.