Direct voltage control for standalone wind energy conversion systems with induction generator and energy storage

A control method for standalone wind energy conversion systems with induction generator and energy storage system (ESS) is proposed in this paper. A fixed-speed self-excited induction generator is directly connected to the standalone power system. An ESS is employed to compensate the power variation from wind generator and load, maintain the power flow balanced. A direct voltage control scheme is developed for the ESS to regulate the bus voltage and frequency. The system small signal model is developed. The proposed system is verified in the simulation and experiments.