Improvement of operating performance for the wind farm with a novel CSC type wind turbine-SMES hybrid system

The purpose of this paper is to propose and analyze the high-performance control strategies for a novel current source converter (CSC) based wind turbine-superconducting magnetic energy storage system (SMES) hybrid system, which in turn improves the operating performance for the whole wind farm, not only in the grid-connected operation, but also in the islanding operation. The key is to design the effective active power controller and the AC bus voltage controller for the grid-connected CSC based hybrid system, in such a way that the better power smoothing performance and robust operation under faulty grid voltage can be achieved. Furthermore, the capacitor voltage control scheme is proposed for the CSC hybrid system to offer the effective operation for the wind farm in the islanding operation. Based on simulation, the CSC based wind turbine-SMES hybrid system has been verified to provide improved operating performance for the wind farm with the proposed control schemes.