Performance Comparison of the Efficiency and Power Density among Multilevel Converter Topologies for a PV Inverter by the Pareto-Front Curve

Abstract

The present paper discusses the optimized design method for the efficiency and power density of a multilevel converter based on the implementation of system integration of power electronics. The performance of a five-level ANPC inverter is compared with that of a conventional two-level inverter, a three-level DC inverter, and a three-level T-type NPC inverter. For a switching frequency range of 1kHz to 500kHz, the comparison results indicate that the five-level ANPC inverter achieves both the highest efficiency and the highest power density.