New Single-Phase Asymmetric Reduced Multilevel Inverter Based on Switched-Diode for Cascaded Multilevel Inverters

Multilevel inverters are used in high-power medium-voltage applications, due to lower harmonics and the lower standing voltage on the power switches than conventional two and three multilevel inverters. The main drawback of multilevel inverters is, requires a high number of switching devices leads to complex their control. This paper introduces an asymmetric switch-diode multilevel inverter for cascaded multilevel inverters. The suggested asymmetric multilevel inverter generates thirty-one-levels with the reduced number of power switches and DC power supplies as well as reduced the maximum total blocking voltage on the switches. A comprehensive study among the suggested topology and other cascaded multilevel inverters are discussed to show the advantages and disadvantages of multilevel inverters. The performance of a single-phase cascaded connection consists of the two suggested multilevel inverter is evaluated in Matlab/Simulink software.