The project included project management, design, engineering, manufacturing, installation and commissioning, where all phases were completed successfully.
It was the world’s first extruded cross linked polyethylene (XLPE) insulated HVDC underground cable. The innovation gave the 80 kV cables enhanced mechanical strength and flexibility, making them ideal for tough installation conditions as well as for interconnecting grids to improve the stability of transmission networks. The cables could be plough installed in a cost-efficient manner and buried close to each other.
We made sure all the equipment was mounted in enclosed modules in the factory and fully factory tested, so that civil works, installation and commissioning time was kept to a minimum. A special advantage of the bipolar cable system used is the virtual elimination of all magnetic fields. The magnetic field is actually reduced to 1 % of the natural magnetism.
The transmission link between the wind farm in the southern part of Gotland and the city of Visby has a 50 MW power rating and it has been transmitting renewable power since 1999.
By providing this powerful solution, we made sure Gotland can continue on it's green path.