Single Phase Hybrid Cascaded H-Bridge and Flying Capacitor Multilevel Inverter with Capacitor Voltage Balancing

Abstract

Abstract—In this paper a single-phase hybrid cascaded H- Bridge and Flying capacitor multilevel inverter with capacitor voltage balancing is proposed. Flying capacitor and cascaded H- Bridge multilevel inverters are the two main multilevel inverter topologies. Cascaded H-bridge multilevel inverters require separate DC sources, whereas flying capacitor multilevel inverters contain capacitors that require balancing of their voltages. So, a hybrid-topology inverter, comprising of single- phase five level flying capacitor and five level cascaded H-bridge inverter with their outputs connected in series so as to reduce the total harmonic distortion (THD) is developed. This method gives fast and good control with minimum acceptable amount of harmonics. The proposed system is being simulated in MATLAB/Simulink software. Index Terms— H-bridge, multilevel inverter, Flying capacitor multilevel inverter, Harmonics, Simulink software.