Performance Analysis of Asymmetrical Cascaded H-Bridge Multilevel Inverter Using Multicarrier Pulse-Width Modulation Techniques

摘要

Multilevel inverters are desirable in the earlier years because of their ability to produce waveforms with enhanced harmonic spectrum and realize necessary voltage. The significant benefits of multilevel inverters are reasonable cost, good performance, lower EMI and less harmonic content. The most prevalent multilevel inverter topologies are diode-clamped, flying capacitor and cascaded H-bridge inverter. Among the multilevel inverters, cascaded H-bridge multilevel inverter has been appealed for middle-level and high-voltage renewable-energy-generating systems such as PV system because of its modular nature. Performance analysis of cascaded multilevel inverter topologies with different DC sources and different carrier-based PWM techniques is presented in this paper.