Earlier this week, Siemens and energy company StatoilHydro installed what they call the first large-scale floating turbine. The installation is off the coast of Norway, and testing is expected to last for two years.
The Hywind turbine will still have a ballast that is tied to the sea floor with cables. Wires will transfer the electricity produced to the mainland grid starting in July. The turbine in Norway will be 7.4 miles offshore where the water is 721 feet deep. It will be utility-size turbine, with a hub height of about 100 feet, capable of generating 2.3 megawatts of electricity.
Source: cnet news