Collaborative Control of Integrated Generation and Storage for Offshore Wind Turbines

The development of offshore wind power has become an attractive option in the zone with developed economy and large electric loads along the coast. Nevertheless, the fluctuation and intermittence of wind power have exerted adverse impacts on the power grid and restricted the capacity of wind power integrated into the grid. Moreover, the typhoon also has a detrimental effect on the safety of wind energy conversion system, especially when the offshore wind farm is disconnected from the main grid before the typhoon is comming. This paper proposes a collaborative control scheme of integrated generation and battery energy storage for an offshore semi-direct drive wind turbine based wind energy conversion system. The battery energy storage system serves to maxmize the utilization of wind power under nomal conditions, and as a backup power source for the auxiliary system of wind turbines in typhoon period. The effectiveness of the proposed approach is validated through digital simulations.