Stability analysis of multi-paralleled VSCs with mismatched parameters

Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearchpeer-review

Abstract

This paper investigates the instability problem caused by the circulating current in the multi-paralleled voltage-source converters (VSCs) with mismatched parameters. The circulating current may arise in the paralleled converters due to the differences in the LCL filer parameters or the controller gains. It is revealed that the circulating current tends to bring instability among paralleled converters, which will also lead to the unstable total current flowing through the point of common coupling. The conditions of the unstable circulating currents are further identified by means of the impedance modeling and analysis of paralleled converters. Experimental results verify the theoretical analysis.
Original languageEnglish
Title of host publicationProceedings of the 34th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2019
Number of pages6
PublisherIEEE Press
Publication dateMar 2019
Pages3508-3513
Article number8722218
ISBN (Print)978-1-5386-8331-6
ISBN (Electronic)978-1-5386-8330-9
DOIs
Publication statusPublished - Mar 2019
Event34th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2019 - Anaheim, United States
Duration: 17 Mar 201921 Mar 2019

Conference

Conference34th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2019
CountryUnited States
CityAnaheim
Period17/03/201921/03/2019
SponsorIEEE Industry Applications Society (IAS), IEEE Power Electronics Society (PELS), Power Sources Manufacturers Association (PSMA)
SeriesIEEE Applied Power Electronics Conference and Exposition (APEC)
ISSN2470-6647

Keywords

  • LCL filter
  • Mismatched parameters
  • Paralleled VSC
  • Single-loop control
  • Unstable circulating current

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