System reconfiguration under open-switch faults in a doubly fed induction machine

Warachart Sae-Kok, Douglas Grant, Barry Williams

Research output: Contribution to journalArticlepeer-review

44 Citations (Scopus)


The aim of this study is to present system reconfiguration for a doubly fed induction machine (DFIM) after an open-switch fault is detected in its back-to-back converters. The open-switch fault and its detection for the scheme are discussed first. System reconfiguration is applied to operate the DFIM after the fault is detected. A four-switch converter topology with dc-link midpoint connection is selected to reconfigure the system. An existing pulse-width modulation method is investigated and applied to reconfigure the system, but uncontrollable capacitor voltage drift occurs. This study proposes a technique to solve the drift problem and also improve the quality of the dc-link voltage. Its effectiveness is substantiated by both simulation and experiment.
Original languageEnglish
Pages (from-to)458 - 470
Number of pages23
JournalIET Renewable Power Generation
Issue number5
Publication statusPublished - 2010


  • open-switch faults
  • induction machine
  • renewable power generation
  • renewable energy


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