A NATURE INSPIRED OPTIMIZATION BASED FUZZY LOGIC CONTROLLER FOR GRID CONNECTED PHOTOVOLTAIC INVERTER

In this study, a novel Fuzzy Logic Controller (FLC) based on Firefly Algorithm (FA) is presented for a grid connected photovoltaic (PV) inverter. The FA is used to obtain the membership functions for the FLC. This technique evades the conventional trial and error procedure for obtaining membership functions of FLC. The fuzzy logic based current and voltage control schemes generate the pulses for three phase inverter based on sinusoidal pulse width modulation. The system shows stable ac output voltage with grid and load disturbances during the transient and steady state operation. With the results 4.99% and 2.71% of total harmonic distortion of current and voltage respectively proves that presented control system is having good performance. The efficacy of the system and control algorithm is verified in the MATLAB/SIMULINK.