Abstract:Doubly fed induction generator participates in power system frequency regulation by attaching virtual inertia and sag control，but the fixed control coefficients cannot realize the actual frequency regulation potential of the wind turbine.To address this problem，a genetic algorithm and fuzzy control （GA-FC） based optimal control strategy for variable coefficient wind turbine frequency regulation is proposed. First，in order to improve the power support capability at frequency regulation，the overspeed load shedding control is analyzed and the load shedding rate at different wind speeds is fitted；then by referring to other literature on the results of virtual inertia control coefficient rectification，the sag control coefficient is rectified and the control coefficient is dynamically adjusted by GA-FC to explore the actual frequency regulation capability of the wind turbine in real time；finally，a simulation model is built in MATLAB/Simulink to verify the proposed strategy，and the results show that the proposed strategy can effectively improve the system frequency support.