To avoid the contradiction between the rapidity and the accuracy of the traditional fixed step size hillclimbing search（ HCS） method in the maximum power point tracking（ MPPT） control of wind power generation system

a variable step size MPPT control algorithm based on the hill-climbing method and the fuzzy control method is proposed. In this algorithm

the maximum power point（ MPP） tracking process is segmented according to the P-ω characteristic curve of generator and the system can select the appropriate tracking algorithm and the step size to achieve MPPT

when the system operates in different regions. The proposed algorithm and the traditional hill-climbing method are simulated respectively by Matlab/Simulink software. The simulation results verify the proposed algorithm can significantly improve the tracking speed and steady-state precision. Therefore

this method is better than the traditional MPPT search method.