Catastrophic bifurcation in three-phase voltage-source converters

Meng Huang, Siu Chung Wong, Chi Kong Tse, Xinbo Ruan

Research output: Journal article publicationJournal articleAcademic researchpeer-review

44 Citations (Scopus)

Abstract

Active pulse-width-modulated (PWM) voltage rectifiers are commonly used to convert ac power from a three-phase grid to a regulated dc voltage with unity input power factor. The output voltage regulation is normally achieved by an outer voltage feedback loop and a sinusoidal pulse-width-modulated (SPWM) inner current loop. Due to output voltage disturbances, such as those produced by a capacitive load, the inner current loop can be easily driven into over-modulation and possible six-step operating regions. Current research efforts have focused on extending the linearity of the modulated voltage in the over-modulation range to reduce the input current harmonics and on studying the closed-loop stability via conventional small-signal linearization around a fixed operating point. Such linear techniques obviously fall short of predicting large-signal transient stability. In this paper, catastrophic bifurcation of the three-phase voltage-source converter is reported. The physical origin of the phenomenon is identified. Boundaries of catastrophic bifurcation in the parameter space are derived. The phenomenon has been verified experimentally.
Original languageEnglish
Article number6289396
Pages (from-to)1062-1071
Number of pages10
JournalIEEE Transactions on Circuits and Systems I: Regular Papers
Volume60
Issue number4
DOIs
Publication statusPublished - 1 Jan 2013

Keywords

  • Bifurcation analysis
  • catastrophic bifurcation
  • stability
  • switching power converter
  • three-phase boost rectifier

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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