Fuzzy Multiple Quasi-Proportional Resonant Control for Single-Phase Grid-Connected Inverters

This paper puts forward a more advanced control algorithm: fuzzy multiple proportional quasi-resonant control, which modifies the controller's parameters in response to input current mistake and the rate of alteration of the mistake. This algorithm combines fuzzy control and proportional resonant control in order to diminish the low harmonic components of the inverter's grid-connected current and suppress particular main frequency harmonics. The proposed control strategy's efficacy is confirmed by Matlab/Simulink simulation, which demonstrates that it can effectively diminish the low-order harmonic components of the input current, thereby enhancing dynamic performance and disturbance immunity to a certain degree. The effects of system disturbances and parameter uncertainties are either eradicated or lessened by it.