Impedance-Based Stability Analysis for Interconnected Converter Systems with Open-Loop RHP Poles

Yicheng Liao, Xiongfei Wang*

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

89 Citations (Scopus)
213 Downloads (Pure)

Abstract

The small-signal stability of interconnected converter systems can be tackled by the impedance-based analysis method, where the Bode plots of the individual impedances derived from subsystems are utilized for a design-oriented analysis. However, those methods only apply to the interconnected systems without having open-loop right-half-plane (RHP) poles. This article thus proposes a general stability analysis method based on Bode plots of individual impedances, which allows considering the open-loop RHP poles and shaping the impedances for stabilizing the system. Experimental case studies on the current control interactions of two paralleled grid-tied inverters validate the effectiveness of the method.

Original languageEnglish
Article number8826385
JournalIEEE Transactions on Power Electronics
Volume35
Issue number4
Pages (from-to)4388-4397
Number of pages10
ISSN0885-8993
DOIs
Publication statusPublished - Apr 2020

Keywords

  • Interconnected converters
  • Right half-plane poles
  • Bode plots
  • Impedance-based analysis
  • Stability
  • inter-connected converters
  • right-half-plane (RHP) poles
  • impedance-based analysis
  • stability

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