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Title: Catastrophic bifurcation in three-phase voltage-source converters
Authors: Huang, M
Wong, SC 
Tse, CK 
Ruan, X
Keywords: Bifurcation
Power electronics
Three-phase boost rectifier
Issue Date: 2011
Source: Proceedings - 4th International Workshop on Chaos-Fractals Theories and Applications, IWCFTA 2011, 2011, 6093511, p. 147-151 How to cite?
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.
Description: 4th International Workshop on Chaos-Fractals Theories and Applications, IWCFTA 2011, Hangzhou, Zhejiang, 19-21 October 2011
ISBN: 9780769545608
DOI: 10.1109/IWCFTA.2011.67
Appears in Collections:Conference Paper

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