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IEEE Transactions on Circuits and Systems

Issue 11 • November 1982

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Displaying Results 1 - 14 of 14
  • Editorial

    Publication Year: 1982, Page(s):701 - 702
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    Freely Available from IEEE
  • Geometric critical point analysis of lossless power system models

    Publication Year: 1982, Page(s):724 - 737
    Cited by:  Papers (36)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1670 KB)

    Electric utility analysts today face an increasingly difficult task of formulating both long and short term operating plans which will provide at the same time efficient and economical operation while delivering reliable and uninterrupted service to electricity users. One of the key ingredients in this planning is a set of large scale simulations of the steady-state network performance under vario... View full abstract»

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  • Realizability inequalities for security constrained load flow variables

    Publication Year: 1982, Page(s):767 - 772
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (754 KB)

    A number of theoretical results are introduced with potential applications in the area of load flow and optimal load flow with security inequality constraints. This problem is formulated in the space of general load flow variables,y in R^{m}, that is, these quantities which for security reasons should be fixed to specified levels or restricted to lie between upper and lower bounds (real... View full abstract»

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  • Reduced order modeling of synchronous machines using singular perturbation

    Publication Year: 1982, Page(s):782 - 786
    Cited by:  Papers (25)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (523 KB)

    A singular perturbation analysis of the synchronous machine equations in the(d, q)reference frame reveals that several reduced order models can be derived systematically from the fundamental machine equations. Some inconsistencies in the classical approach to model reduction are eliminated, and some assumptions commonly overlooked in the literature are clarified. Ways of accounting for ... View full abstract»

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  • Chaotic motions in the two-degree-of-freedom swing equations

    Publication Year: 1982, Page(s):738 - 746
    Cited by:  Papers (86)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1080 KB)

    We analyze chaotic motions occurring on certain energy surfaces of the conservative two-degree-of-freedom (three-machine) swing equations used as models in transient stability analysis of electric power systems, and we note the implications of this chaotic behavior for first swing stability predictions using these equations. In the particular parameter range chosen for study the swing equations ma... View full abstract»

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  • The application of decision theory to contingency selection

    Publication Year: 1982, Page(s):712 - 723
    Cited by:  Papers (42)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1312 KB)

    This paper presents the theory and method for systematically finding the performance index (PI) which is used in Automatic Contingency Selection (ACS) algorithms. Since the ACS problem is a binary decision problem, then the choice of the PI is equivalent to the selection of a decision function which measures the impact of each contingency on the system performance in terms of giving out-of-limit c... View full abstract»

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  • A Clustered Dynamic Model for a class of LInear Autonomous Systems Unsing Simple Enumerative Sorting

    Publication Year: 1982, Page(s):747 - 758
    Cited by:  Papers (42)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1408 KB)

    Simple, computationally efficient, enumerative techniques are introduced for establishing a clustered semidecoupled dynamic model for a class of autonomous linear systems exemplified by the electromechanical dynamics of the electric power system. Such a model consists of intercluster (usually slow) dynamics and intracluster dynamics (usually fast) which are respectively weakly coupled. The process... View full abstract»

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  • Singular perturbations and time scales in nonlinear models of power systems

    Publication Year: 1982, Page(s):758 - 767
    Cited by:  Papers (46)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1104 KB)

    Recent results on linear slow coherency and aggregation are extended to nonlinear electromechanical models of power systems and similar dynamic networks. Conservation and equilibrium properties are used for the derivation of nonlinear singular perturbation models with explicit separation of time scales. View full abstract»

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  • The analysis of high-phase-order power transmission systems

    Publication Year: 1982, Page(s):786 - 789
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (552 KB)

    In this letter the analysis of power systems with more than three phases is discussed. It is shown that the six-phase elements can be replaced by equivalent three-phase elements. The load-flow algorithms and the techniques for the computation of short-circuit currents, which are available for three-phase power systems, can hence be used for six-phase and other high-phase-order power systems. View full abstract»

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  • A probabilistic model of power system disturbances

    Publication Year: 1982, Page(s):789 - 796
    Cited by:  Papers (15)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (744 KB)

    Power system stability analysis involves the study of the state trajectories of a power system in response to a disturbance. The system is usually presumed to be in a static equilibrium state when the disturbance is initiated. The disturbance causes a dynamic motion of the system state variables to either a new equilibrium condition or an unstable condition, which we usually regard as a system fai... View full abstract»

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  • Practical complex solution of power flow equations

    Publication Year: 1982, Page(s):772 - 775
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (432 KB)

    This paper applies and illustrates the compact, complex notation introduced by Bandler and El-Kady to the practical solution of the power flow equations. The solution of the complex linearized power flow equations, which is required by the Newton-Raphson method, is obtained by a direct method. The method, fully and exactly, incorporates generator buses as well as dummy load buses. View full abstract»

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  • Steady-State Security Regions of Power Systems

    Publication Year: 1982, Page(s):703 - 711
    Cited by:  Papers (91)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (920 KB)

    A steady-state security region is a set of real and reactive power injections (load demands and power generations) for which the power flow equations and the security constraints imposed by equipment operating limits are satisfied. The problem of determining steady-state security regions is formulated as one of finding sufficient conditions for the existence of solutions to the power flow map with... View full abstract»

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  • Application of minimum loss property of resistive networks to power scheduling

    Publication Year: 1982, Page(s):775 - 777
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (400 KB)

    The load flow equations of a loss less transmission system has the same structure that of a nonlinear resistive network. By utilizing the minimum loss property of nonlinear resistive networks [9], the solution to the load flow equation can be characterized as the minimum of a suitably defined function. This characterization is utilized in solving the problem of scheduling power for economic operat... View full abstract»

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  • Coherency identification for large electric power systems

    Publication Year: 1982, Page(s):777 - 782
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (736 KB)

    An important problem associated with contingency and reliability studies for large-scale electric power systems is the use of dynamic equivalent models to represent the behavior of aggregable parts of the system. Fundamental to the aggregation process associated with any coherency-based approach is an ability to identify groups of coherent generators or generators that swing together in response t... View full abstract»

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