Fuzzy Logic Size and Frequency Scheduling of dP-P&O Perturbation for WECS MPPT Control

A novel Maximum Power Point Tracking (MPPT) algorithm for variable speed Permanent Magnet Synchronous Generator (PMSG) based Wind Energy Conversion System (WECS) is proposed in this paper. In this approach, a classical hill climbing MPPT method, called dP-P&O is analyzed and improved to overcome its drawbacks and guarantee better control performance to face the fast wind speed changing conditions. In the proposed method, the dP-P&O perturbation step size and frequency are scheduled using a multi-input multi-output Fuzzy Logic Controller (FLC). Simulation with Matlab/Simulink, under different wind speed and load change conditions, is presented to evaluate the performance of the proposed MPPT algorithm. When compared to the simple dP-P&O method, the obtained results show that the proposed strategy improves energy quality through ameliorated performance and robustness.