A new multilevel converter with multi-winding medium-frequency transformer

Zedong Zheng, Zhigang Gao, Yongdong Li, Chunyang Gu, Lie Xu

Research output: Chapter in Book/Conference proceedingConference contributionpeer-review

7 Citations (Scopus)

Abstract

In this paper, a novel multi-level converter was proposed where an isolated DC-DC converter with a multi-winding medium frequency transformer is used to realize the energy equalization within different cells. A cascaded H-bridge rectifier is directly connected to the AC grid and the normal input transformer was not necessary. Several separate DC buses can be produced by the cascaded H-bridge rectifier which can be inverted to medium frequency AC voltages and feed the primary windings of the multi-winding medium frequency transformer. On the secondary windings, several isolated DC buses will be produced from the output by the transformer. In this paper, the stability of the proposed converter and the equalization of the DC bus were analyzed. The control strategy of the whole system was studied and verified by some simulation and experiments.

Original languageEnglish
Title of host publicationProceedings of the 2011 14th European Conference on Power Electronics and Applications, EPE 2011
Publication statusPublished - 2011
Externally publishedYes
Event2011 14th European Conference on Power Electronics and Applications, EPE 2011 - Birmingham, United Kingdom
Duration: 30 Aug 20111 Sep 2011

Publication series

NameProceedings of the 2011 14th European Conference on Power Electronics and Applications, EPE 2011

Conference

Conference2011 14th European Conference on Power Electronics and Applications, EPE 2011
Country/TerritoryUnited Kingdom
CityBirmingham
Period30/08/111/09/11

Keywords

  • cascaded H-bridge rectifier
  • medium frequency converter
  • multi-windings medium frequency transformer
  • multilevel converter
  • voltage balance

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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