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Title: Hopf-type bifurcation in three-phase PFC power supplies connected to non-ideal power grid
Authors: Huang, M
Tse, CK 
Wong, SC 
Issue Date: 2012
Source: Proceedings of the 5th International Workshop on Chaos-Fractals Theories and Applications, IWCFTA 2012, 2012, 6383255, p. 151-154 How to cite?
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.
Description: 5th International Workshop on Chaos-Fractals Theories and Applications, IWCFTA 2012, Dalian, Liaoning, 18-21 October 2012
ISBN: 9780769548357
DOI: 10.1109/IWCFTA.2012.41
Appears in Collections:Conference Paper

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