Reactive power management in an offshore AC network having multiple voltage source converters

Many offshore wind power plants are being developed every year at North and Baltic Sea. Combined energy transmission to shore instead of standalone is suitable from the prospective of environment and integrated European power market. Offshore ac hub is beneficial for the wind power plants that are far from shore but close to each other within the vicinity of 20 km. This article presents a method of controlling reactive power flow in the offshore ac grid to minimize the power losses and select the suitable network layout. In the proposed scheme, offshore grid frequency and voltage is controlled through more than one converters. Using frequency droop, active power sharing is done among converters and with voltage droop reactive power. Further, the optimization algorithm also provide the set points for wind power plants to contribute in the management of reactive power flow.