Abstract

In this paper a new multilevel inverter topology is proposed for a three-phase grid-connected photovoltaic (PV) system. The proposed symmetric multilevel inverter generates seven-levels with reduced number of power switches than conventional symmetric multilevel inverters. The PV panels are connected to charge three equal capacitor voltages in each phase with appropriate PI controller. The maximum power point tracking method is extracted form PV panels by controlling of the voltage, power and current. Finally, in order to performance evaluation proposed seven-levels multilevel inverter, the proposed topology is simulated and the variation of capacitor voltages, the output voltage of inverter and grid injected current are presented.