FUZZY LOGIC CONTROLLED MODIFIED THREE PHASE MLI FED FROM SINGLE DC SOURCE FOR PV APPLICATIONS

Abstract

This paper presents simulation and validation of Fuzzy Logic (FL) controlled modified three phase Multilevel Inverters (MLI) fed from the single DC source for Photovoltaic (PV) applications. In this proposed inverter, gating pluses to the inverter is generated with the help of Space Vector Pulse Width Modulation (SVPWM) control technique. This control technique is implemented in the Field Programmable Gate Array (FPGA) development board. The main aim is to design a FL controller for grid connected applications and to achieve improved output waveforms, minimum, low Total Harmonics Distortion (THD) values, quick response and high robustness. Finally, the THD comparison made between PI and FL controller for validation of the proposed system and thus FL Controlled three phase MLI inverter is significantly improved the performances than PI controller. The proposed three phase inverter is verified through using MATLAB Simulink environment and In order to evaluate, the simulated results a laboratory prototype is built. The simulation &experimental results match very closely.