Application of Maximum Power Point Tracking Based on Fuzzy Control in Photovoltaic Grid\|Connected System

In order to improve the efficiency of photovoltaic (PV) grid\|connected system, and decrease the voltage fluctuation, a novel method of maximum power point tracking (MPPT) based on fuzzy control is proposed. Based on the analysis on characteristics of PV cell and several common MPPT algorithms of PV grid\|connected system, a fuzzy MPPT control strategy based on the perturbation and observation (P&O) method is proposed according to the shortage of (P&O) method, in which fuzzy control method is introduced to MPPT algorithms. The model of photovoltaic grid\|connected system is established and simulated by Matlab/Simulink. Simulation results show that the method can track the changes of the external weather rapidly, which make the photovoltaic grid\|connected system run in maximum power point with good dynamic and static performance.