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Closed Loop Control of Multilevel Inverter Using SVPWM for Grid Connected Photovoltaic System

P.Thirumuraugan, R.Preethi

This paper discuss about the closed loop control of Diode Clamped Multilevel Inverter (DCMLI) for grid connected photovoltaic (PV) system. PV array is controlled and maximum power is obtained by fuzzy based MPPT algorithm. DC-DC converter is not needed because fuzzy MPPT is integrated with the inverter so that the output shows accurate and fast response.Space Vector Pulse Width Modulation (SVPWM) is used to control the inverter because of its highest efficiency and simulation is achieved through MATLAB/Simulink. The simulation results of three phase three-level and five-level diode clamped multilevel inverter are compared in terms of Total Harmonic Distortion (THD) rate.