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Title: Irreversible bifurcation phenomenon in power-grid connected converter systems
Authors: Wan, C
Huang, M
Tse, CK 
Wong, SC 
Ruan, X
Keywords: Bifurcation
Power converter
Power grid
Issue Date: 2012
Publisher: World Scientific
Source: International journal of bifurcation and chaos in applied sciences and engineering, 2012, v. 22, no. 6, 1250155 How to cite?
Journal: International journal of bifurcation and chaos in applied sciences and engineering 
Abstract: Three-phase voltage source converters (VSC) are commonly used to convert ac power from a three-phase grid to a regulated dc voltage with unity input power factor. The control of the VSC is normally achieved by an outer voltage feedback loop and a sinusoidal pulse-width-modulated (SPWM) inner current loop. However, the nonideal power grid and the presence of other interacting loads give rise to nonlinear operation and drive the VSC to enter an irreversible instability region. In this paper, an irreversible bifurcation phenomenon in a three-phase voltage-source converter connected to a power grid with an interacting load is reported. The converter can also be regarded as exhibiting a catastrophic bifurcation in which the input current expands to cause undesirable component stress. A large-signal analysis is adopted to identify the physical origin of the phenomenon and to locate the boundary of the instability.
ISSN: 0218-1274
EISSN: 1793-6551
DOI: 10.1142/S0218127412501556
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