Design and implementation of Grid-Connected PV system based Multilevel Inverter with distributed MPPT for Fuzzy logic Controller

Abstract

-This paper introduces a particular fell H-span multilevel pthotovoltaic (PV) inverter for three phase grid-connected applications. The measured fell multilevel topology enhances the proficiency and adaptability of PV systems. To acknowledge better use of PV modules and maximize the solar energy extraction, a dispersed most extreme power point following control plan is connected to both single-and three-phase multilevel inverters, which permits independent control of each dc-link voltage. For three-phase grid-connected applications, PV mismatches may introduce unbalanced supplied power, driving to unequal matrix current. A test three-phase multi level fell H-span inverter has been fabricated using nine H-span modules. Fuzzy Logic based Intelligent Controller has been implemented for voltage regulation at Point of Common Coupling of Grid connected PV Power System.  To realize better utilization of PV modules and maximize the solar energy extraction, a distributed maximum power point tracking control scheme is applied to both single- and three-phase multilevel inverters, which allows independent control of each dc-link voltage. The proposed grid connected Power System has been designed and analyzed in MATLAB Simulink environment