Simulink implementation of three-phase PWM rectifier using five-level cascaded H-bridge MLI configuration

Abstract

Ability of multilevel inverters (MLI) to operate with matured medium power electronic devices has enhanced their prominence for active front converters in various applications such as drive control, battery energy storage systems and PV/Grid integrated systems. In short, Active front end (AFE) converters are regenerative rectifiers incorporated to, simultaneously regulate dc-link voltage and ensure unity power factor at source terminals. Realizing the significance of MLI based active front end converter, this paper presents Simulink implementation of MLI based active front end converter, using most popular classical MLI i.e., cascaded H-bridge. Imposing level shifted and phase shifted carrier arrangements, implementation PWM for CHB is demonstrated and MATLAB simulation results for both open loop and closed systems are presented.