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Browsing by Author "Fang, KH"

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    Bifurcation analysis of power systems with tap changer
    (2005)
    Liaw, DC
    ;
    Fang, KH
    ;
    Song, CC
    ;
    電控工程研究所
    ;
    Institute of Electrical and Control Engineering
    A bifurcation analysis of nonlinear dynamics for electric power system with tap changer is presented in this paper. Based on a model of electric power system proposed by Dobson and Chiang (1988) with one extra tap changer added parallel to the local nonlinear power load, the saddle-node bifurcation and Hopf bifurcations are observed by treating the real power, reactive power and tap changer as system parameters. The occurrences of subcritical Hopf bifurcation and saddle-node bifurcation lead to the appearance of dynamic and static voltage collapses, respectively. These phenomena may generate the progressive decrease in voltage magnitude in electric power system.