In the project for connecting the DolWin gamma converter station, for the first time a cable system consisting of a highly flexible 155 kV high-voltage cable with solid-insulated, pluggable Connex size 6 connection system and gas-free epoxy resin joints from Pfisterer has been successfully tested and installed under real conditions on an offshore platform.
The flexible and also heavy Feltoflex cables run over several platform levels and through extremely low spaces. The tighter it gets, the more difficult it is to lay HV cables with a diameter of about 98 mm and weighing approximately 16 kg per metre. The experience that has been gained onshore will be used for the offshore installations which will be starting shortly. These will initially begin with the laying of two medium-voltage cable systems for the platform’s auxiliary power This will be followed by the installation of for six high-voltage cable systems. When this is done, DolWin alpha and DolWin gamma will be the first two sister platforms to have been connected via a bridge with a highly flexible 155 kV cable. With a length of more than 200 metre, this will also be the longest connection between two platforms worldwide.