Optimal Design of a New Cascaded Multilevel Inverter Topology With Reduced Switch Count
Document Type
Article
Publication Date
1-1-2019
Abstract
Multilevel inverters (MLIs) are a great development for industrial and renewable energy applications due to their dominance over conventional two-level inverter with respect to size, rating of switches, filter requirement, and efficiency. A new single-phase cascaded MLI topology is suggested in this paper. The proposed MLI topology is designed with the aim of reducing the number of switches and the number of dc voltage sources with modularity while having a higher number of levels at the output. For the determination of the magnitude of dc voltage sources and a number of levels in the cascade connection, three different algorithms are proposed. The optimization of the proposed topology is aimed at achieving a higher number of levels while minimizing other parameters. A detailed comparison is made with other comparable MLI topologies to prove the superiority of the proposed structure. A selective harmonic elimination pulse width modulation technique is used to produce the pulses for the switches to achieve high-quality voltage at the output. Finally, the experimental results are provided for the basic unit with 11 levels and for cascading of two such units to achieve 71 levels at the output. © 2013 IEEE.
Keywords
Basic unit, cascaded inverter, multilevel inverter (MLI), optimization, reduce switch count, selective harmonic elimination, SHEPWM
Divisions
fac_eng
Funders
University of Malaya, Malaysia, through FRGS under Grant FRGS/1/2018/TK07/UM/01/3,Frontier Research under Grant FG007-17AFR
Publication Title
IEEE Access
Volume
7
Publisher
Institute of Electrical and Electronics Engineers