International Journal of Power Electronics and Drive Systems (IJPEDS)
Vol 15, No 4: December 2024

Switching state vector selection for improved THD performance in multilevel current fed inverters

Reddy, G. Prem Kumar (Unknown)
Mangu, Bhukya (Unknown)



Article Info

Publish Date
01 Dec 2024

Abstract

This paper aims to explore synthesis methods of three-phase multi- level current waveforms by utilizing a configuration of n parallel operating three-phase, three-level current-fed inverters (CFIs). It points out an issue where differences in the DC-link current between inverters cause a distorted space vector diagram and decreased switching state redundancy, this leads to generation of low frequency harmonics in the output current and increased total harmonic distortion (THD). The research suggests a method that chooses the best switching state vectors by considering their closeness to a reference current space vector. This approach aims to decrease switching losses and low-frequency harmonic content. This method improves the quality of the waveform and the efficiency of the inverter by closely matching the switching operations with the intended current path. An analytical model is created to investigate how changes in DC-link current impact inverter performance. Simulations and actual tests confirm the ef-ficacy of the proposed strategy in enhancing total harmonic distortion (THD) and waveform accuracy. The results provide valuable information on improving multilevel inverter designs to enhance power quality and operational efficiency, indicating potential areas for further research in power electronics.

Copyrights © 2024






Journal Info

Abbrev

IJPEDS

Publisher

Subject

Control & Systems Engineering Electrical & Electronics Engineering

Description

International Journal of Power Electronics and Drive Systems (IJPEDS, ISSN: 2088-8694, a SCOPUS indexed Journal) is the official publication of the Institute of Advanced Engineering and Science (IAES). The scope of the journal includes all issues in the field of Power Electronics and drive systems. ...