Browsing by Author "Rosehart, William D."

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    Bifurcation analysis of various power system models
    (Elsevier, 1999-02-01) Rosehart, William D.; Cañizares, Claudio A.
    This paper presents the bifurcation analysis of a detailed power system model composed of an aggregated induction motor and impedance load supplied by an under-load tap-changer transformer and an equivalent generator and transmission system. Different modeling levels with their respective differential-algebraic equations are studied, to determine the minimum dynamic model of the system that captures the most relevant features needed for bifurcation studies of power systems. An aggregated model of a realistic load is used to illustrate the ideas presented throughout the paper.
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    Effect of detailed power system models in traditional and voltage-stability-constrained optimal power-flow problems
    (Institute of Electrical and Electronics Engineers (IEEE), 2003-02-28) Rosehart, William D.; Canizares, Claudio A.; Quintana, Victor H.
    In this paper, detailed generator, exponential load, and static volt-ampere-reactive (VAr) compensator models are incorporated into traditional and voltage-stability-constrained optimal power-flow problems to study the effect that the different models have on costs and system-loadability. The proposed models are compared to typical models by means of a detailed analysis of the results obtained for two IEEE test systems; interior point methods are used to obtain numerical solutions of the associated optimization problems.