THD Analysis of Cascaded Multi-level Inverters using different PWM Techniques

Abstract

Multi-level inverters (MLI) are used in places or industries that require very high voltage and huge current. Multi-level inverter topologies have various advantages over single level converters. These advantages are like: rise in output voltage, reduction in the total harmonic distortion (THD), reduction in electro-magnetic interference (EMI) generation etc. Key attribute of a multi-level inverter is the reduction in the voltage stress on each power device. This reduction is due to the use of several levels available on the DC bus. The dawn of multi-level inverter