A Single-Phase Inverter Topology with Seven-Level Output based on T-type Structure

This paper introduces a novel single-phase seven-level inverter structure that is based on a modified T-type structure. This topology employs a reduced number of devices compared to classical multilevel inverter (MLI) topologies. It also uses a single DC source that renders this topology suitable for PV applications. The DC-link capacitors required in this topology have reduced size which in turn reduces the overall cost of the system. The working modes of the circuit and modulation method of the proposed structure are presented comprehensively. Finally, the introduced topology is simulated in the environment of MATLAB/SIMULINK and the obtained output results are presented.