Hopf-type bifurcation in three-phase PFC power supplies connected to non-ideal power grid

Meng Huang, Chi Kong Tse, Siu Chung Wong

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

2 Citations (Scopus)

Abstract

Three-phase power factor correction (PFC) power supplies are commonly used to convert ac power from a three-phase grid to a regulated dc voltage. However, the non-ideal power grid may drive the converter to enter a low-frequency instability region. In this paper, a low-frequency instability phenomenon in three-phase PFC power supplies is reported. The converter can also be regarded as exhibiting a Hopf-type bifurcation in which the dc output voltage oscillates at 150 Hz, and large amount of harmonics appear on the line current. We develop an averaged model of the grid-converter system to predict the low-frequency instability. Additionally, as a result of the emergence of low-frequency oscillation, the stability boundary leading to a catastrophic bifurcation changes dramatically. These phenomena are verified with realistic cycle-by-cycle simulations.
Original languageEnglish
Title of host publicationProceedings of the 5th International Workshop on Chaos-Fractals Theories and Applications, IWCFTA 2012
Pages151-154
Number of pages4
DOIs
Publication statusPublished - 1 Dec 2012
Event5th International Workshop on Chaos-Fractals Theories and Applications, IWCFTA 2012 - Dalian, Liaoning, China
Duration: 18 Oct 201221 Oct 2012

Conference

Conference5th International Workshop on Chaos-Fractals Theories and Applications, IWCFTA 2012
CountryChina
CityDalian, Liaoning
Period18/10/1221/10/12

ASJC Scopus subject areas

  • Computational Theory and Mathematics
  • Applied Mathematics

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