A Hybrid Control Strategy for PMSG-based Standalone Wind Turbines with BESS

Abstract

Energy conversion efficiency and power quality are both two key objectives of control schemes in wind energy conversation systems (WECS). These two tasks are hard to trade off and contradictory since improving the conversion-efficiency may boost fluctuation of output power as well. This paper suggests a hybrid control strategy for variable speed PMGS with Battery energy storage system to provide consistent power and meet variable load demands. In the suggested scheme, Fuzzy logic is combined with model predictive control (MPC) to capture the merits of these two different methods. The proposed controller (F_MPC) could improve wind turbine performance and provide power reliability. Simulation results prove that, in comparison with traditional PI model, the proposed topology can achieve benefits in terms of step response (overshoot), frequency deviation, and total harmonic distortion (THD) of almost 1.2%, 4.2%, and 1.24% respectively.