A novel control strategy for doubly fed induction generator in micro-grid with super capacitors

Due to the fact that the micro-grid system based on doubly fed induction generator driven by wind turbine is liable to be effected by wind fluctuation and load variation, so that the output power from the generator is instable and the dynamic performance of the micro-grid system is poor. This paper presents a novel control strategy for doubly fed induction generator in micro-grid with super capacitors. Considering the control characteristic of grid side power conditioner, rotor side voltage source converter and DC link in micro-grid system, the super capacitor is chosen as energy storage unit, then the transient performance of the generator is improved and the output power fluctuation is restrained. The simulation results verify that this method can enhance the operation performance of the micro-grid effectively and provide high quality power supply for various load.