Research on Control algorithm of Photovoltaic Grid-connected Inverter Based on Fuzzy Logic

Abstract

At present, under the control of disturbance observation method, conductance increment method and constant voltage tracking method, the conversion efficiency of grid-connected photovoltaic inverters is low. Firstly, the principle of fuzzy logic control is analyzed, and then the control process is studied, including the structure design of the fuzzy controller, the fuzzification treatment, the determination of membership function, the determination of the fuzzy control rules and the de-fuzzification. Finally, the application test is carried out on the MATLAB simulation platform.Finally, the application test is carried out on the MATLAB simulation platform.The results show that under the control of this algorithm, the efficiency of grid-connected photovoltaic inverters is improved by 6.1%, 10.1% and 16.2%.