A new multilevel inverter topology with reduced switch count for domestic solar PV units

Abstract

The introduction of state of the art solid state technologies has made the multilevel inverters attractive for stand alone or grid connected renewable energy resources. A multilevel inverter can provide an alternating voltage at its terminals from the available isolated dc sources is capacitors. Recent researches in multilevel inverters are focusing on reduction of required components and maximizing the levels of terminal voltage. This work proposes a sub multilevel inverter topology with least number of circuit components. The simulation has been done in MATLAB/Simulink software package and the results obtained from the proposed topology has been compared with the topologies given in recent works in the aspects like number of IGBTs, number of drivers and switching losses. The comparison shows that the proposed topology is more efficient.