High Performance Parallel Single-Phase Converter Reconfiguration for Enhanced Availability

Mohammad Hassan Hedayati*, Vinod John

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

2 Citations (Scopus)


Paralleling power converters is a common practice in industries to enhance total power rating, reliability, and availability of the system. In case of fault occurring in systems with parallel converters, the faulty power converter can be isolated and the system can still be operated at reduced power level. In this paper, a grid-connected power converter consisting of two parallel H-bridge converters with low ground leakage current is considered. Two contingency configurations, that are also of low ground leakage current, are proposed to enhance the availability of the system. This is done by reconfiguring the power circuit to a single H-bridge in the case of failure in one of the bridges. The power converter is experimentally tested with the proposed configurations for experimental validation. The results show that the second configuration has better performance in terms of power loss and current total harmonic distortion when operating at lower power level.

Original languageEnglish
Article number8010843
Pages (from-to)388-394
Number of pages7
JournalIEEE Transactions on Industry Applications
Issue number1
Publication statusPublished - 1 Jan 2018


  • Carrier interleaving
  • grid-connected converters
  • interphase inductor
  • LCL filter
  • parallel converters


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