A Generalized Single Phase Cascaded Modular Multilevel Inverter based on Inter and Intra Module Configurations

Abstract

A single phase cascaded modular multilevel inverter is derived from further modified H-bridge module (FMHB). The principle of self-balancing is explained for proposed 5-level basic module. The attractive feature of this topology is its capability to function under both symmetrical and asymmetrical modes with less power switches. The propounded multilevel inverter can synthesize levels according to the magnitude of DC voltage sources employed in each module. The inter and intra module configurations are analyzed. The comparative analysis is done with classical cascaded H-bridge (CHB) and recently reported multilevel inverters. The pulse sequence is generated by Nearest Level Control (NLC) technique. The simulations are performed in MATLAB/SIMULINK under dynamic transition of cascade connections. Experimental results are presented by cascading two FMHB modules to affirm simulation results.