Control strategy of a multi-level converter with multi-winding MFT/HFT isolation

Chunyang Gu, Zedong Zheng, Yongdong Li

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

8 Citations (Scopus)

Abstract

Control strategy of a novel multi-level converter with multi-winding MFT/HFT isolation is proposed where a medium frequency or high frequency multi-winding transformer is applied to realize the isolation and energy balance instead of conventional phase-shifting transformer. Load powers can be equalized among different windings by the energy delivery using transformer flux. The application of the proposed converter is high power locomotive traction systems, marine driving, wind power generation systems and highvoltage direct current (HVDC) transmission systems. General analysis of multi-winding isolation units is made including power characteristics of general phase shift control, analysis of other two phase shift method as well as the decoupling method of multi-winding powers. Power balancing of the isolation units is realized. Control strategy for cascaded H-bridge rectifier is put forward. Moreover, a four-step pre-charging method is proposed for this topology. Simulation and experimental results are given to validate the proposed strategy.

Original languageEnglish
Title of host publication2014 IEEE Energy Conversion Congress and Exposition, ECCE 2014
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages3717-3724
Number of pages8
ISBN (Electronic)9781479956982
DOIs
Publication statusPublished - 11 Nov 2014
Externally publishedYes

Publication series

Name2014 IEEE Energy Conversion Congress and Exposition, ECCE 2014

ASJC Scopus subject areas

  • Fuel Technology
  • Energy Engineering and Power Technology

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