NEW CONCEPT OF MULTILEVEL INVERTER TOPOLOGY

Abstract — Multi level 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 15-level inverter is modelled and simulated in Matlab 2012a using Simulink and Sim Power Systems set tool boxes. Index Terms—: Multilevel inverter, power electronics,SPWM, topolog