Single-Phase AC–DC–AC Three-Level Three-Leg Converter

Author

De Freitas, Isaac Soares ; Jacobina, Cursino Brandão ; Silva, Edison Roberto Cabral da ; Oliveira, Talvanes Meneses

Author_Institution

Dept. of Electr. Eng., Fed. Univ. of Paraiba, João Pessoa, Brazil

Volume

57

Issue

12

fYear

2010

Firstpage

4075

Lastpage

4084

Abstract

In this paper, a three-level three-leg ac-dc-ac converter for single-phase applications is investigated. The operating principles and control strategies for the topology are presented. It is shown that dc-link voltage balancing and its reduction are important objectives in the system design. The proposed pulsewidth modulation (PWM) strategy permits the dc-link capacitor voltage balance and also its reduction. The three-level converter is compared to the two-level converter in terms of rms switch currents, harmonic distortion, losses, and costs. Experimental and simulation results are presented to validate the theoretical studies.

Keywords

AC-DC power convertors; DC-AC power convertors; PWM power convertors; harmonic distortion; voltage control; DC-link capacitor voltage balance; DC-link voltage control; harmonic distortion; pulsewidth modulation; single-phase AC-DC-AC three-level three-leg converter; Analog-digital conversion; Capacitors; Costs; Harmonic distortion; Jacobian matrices; Pulse width modulation; Switches; Switching converters; Topology; Voltage; DC-link voltage control; single-phase ac–dc–ac; three-level converter;

fLanguage

English

Journal_Title

Industrial Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0278-0046

Type

jour

DOI

10.1109/TIE.2010.2043042

Filename

5416286