Design and Implementation of Asymmetric Cascaded Multilevel Inverter with Optimal Components

Abstract

A novel asymmetrical cascaded one-twenty-five level multilevel inverter is proposed with optimal components. The proposed inverter consists of three sub-cells connected asymmetrical configuration to generate a 125-level output voltage. The sub-cell comprises six power switches and two DC sources to produce five output voltage levels with symmetrical configuration. This paper presents the five, twenty-five, one-twenty five-level inverters with optimal components with very lower harmonics. The results of the proposed inverters are experimentally tested with linear and non-linear loads. During dynamic circumstances, the suggested inverters are extremely stable. The proposed inverters will generate a greater voltage level with nominal harmonics as per IEEE standards. A complete comparison is made with previously published similar MLIs with proposed twenty-five MLI. The Proposed MLI has several merits such as cost factor, optimal components, THD, and TSV. The proposed five, twenty-five, and one-twenty-five level inverters are experimentally implemented with the help of the dSPACE RTI1104 controller. The proposed inverters are well suited for grid-connected and renewable applications.