Design & Simulation of 3-Phase, 27-Level Inverter with Reverse Voltage Topology

Multilevel inverters have been widely accepted for high-power high-voltage applications. Their performance is highly superior to that of conventional Seven-level inverters due to reduced harmonic distortion, lower electromagnetic interference, and higher dc link voltages. In this paper, a new topology with a reversing-voltage component is proposed to improve the multilevel performance. This topology requires fewer components compared to existing inverters (particularly in higher levels) and requires fewer carrier signals and gate drives. Therefore, the complexity is greatly reduced particularly for higher output voltage levels. The Proposed 27-level inverter is modeled and simulated in Matlab 2012b using Simulink and Sim Power Systems set tool boxes