The Siemens HVDC Plus system is installed on an offshore substation platform together with the transformers and gas-insulated high-voltage switchgear for energy-efficient transmission of the power generated by wind farms to the mainland. Siemens supplies this Wind Power Offshore Switchgear (WIPOS) technology on a floating, self-lifting platform, which is pulled to its site on the open sea using ocean-going tugs. The alternating current produced by the wind turbines will be converted to direct current on the platform, which will later be located directly adjacent to the wind farm in the North Sea. The direct current will be brought to a transmission voltage of 320 kilovolts (kV). The power will then be transmitted with low losses to the grid feed-in point on the coast, where the electricity will be converted back from direct to alternating current in a converter substation.