Analysis, Simulation and Implementation of a Novel Dual Bridge Asymmetric Cascaded Multi Level Inverter using MGWO-PI-PWM controller

Abstract This paper proposes a novel dual bridge asymmetric cascaded multilevel inverter to produce 21 level output which requires twelve switches and three sources only when compared with the conventional topologies such as multilevel DC link (MLDCL) and dual H-bridge (DHB). The successful working of the projected topology is validated by carrying out the simulation in MATLAB/Simulink. Modified GWO based PI controller with PWM technique (MGWO-PI-PWM) is applied for controlling the switches, which results in reduced Total Harmonic Distortion (THD).A detailed analysis and comparison study of the number of switches and DC sources required to produce the twenty one level output for the proposed topology is performed and compared with the conventional MLI topologies. A prototype of the inverter is developed and its spectral quality is analyzed. The simulation results are verified experimentally.