Three-Phase-to-Three-Phase AC/AC DC-Link Five-Leg Converters Based on Three- and Two-Level Legs

The five-leg back-to-back converter shares a leg between the grid and load sides. In the conventional five-leg converter, all legs are of same type, i.e., either two- or three-level legs. This paper presents topologies of five-leg converters based on the combination of two- and three-level legs. The...

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Bibliographic Details
Published inIEEE transactions on industry applications Vol. 51; no. 1; pp. 521 - 530
Main Authors de Macedo Barros, Luciano, Brandao Jacobina, Cursino, Cunha Oliveira, Alexandre, Soares de Freitas, Isaac, Cabral da Silva, Edison Roberto
Format Journal Article
LanguageEnglish
Published IEEE 01.01.2015
Subjects
Educational institutions
Electrical engineering
Legged locomotion
Power quality
Pulse width modulation
Topology
Vectors
reduced switch count
Five-leg converter
three- and two-level legs
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Summary:The five-leg back-to-back converter shares a leg between the grid and load sides. In the conventional five-leg converter, all legs are of same type, i.e., either two- or three-level legs. This paper presents topologies of five-leg converters based on the combination of two- and three-level legs. The proposed configurations permit one to obtain intermediary characteristics between the five-leg converter with all three-level legs and that with all two-level legs. The choice of the number of two- and three-level legs and how combine them are shown in order to obtain some characteristics of the grid- and load-side converter voltages. The modeling of the system and the pulsewidth-modulation strategy based on carrier-based and space-vector approaches is presented. Analysis of the total harmonic distortion and power switches losses are also addressed to characterize the configurations. Experimental and simulated results show the system feasibility.
ISSN:0093-9994
1939-9367
DOI:10.1109/TIA.2014.2336978