The problem of creating a practical computational tool to perform transient contingency analysis in a power system control center is considered. The computer program developed may be used in a control center computer where a state estimation program or a consistent set of load flow data is available. It can be run on a periodic basis over a previously specified contingency list, or it can be called by the system operator to analyze a particular contingency. The transient behavior of the system is evaluated based on a simulation technique widely acknowledged for its fast solutions. The method uses rapidly convergent iterative solutions with the triangularized admittance matrix to solve the network equations and incorporates the differential equations using the implicit trapezoidal rule of integration. The program was developed assuming that the mechanical torque input for each generator remains constant throughout the simulation of a contingency. Also, network changes were handled in such a way that only one triangularization of the admittance matrix in its pre-fault conditions is required to analyze several contingencies under a given initial operating condition. Copyright © 1981 by The Institute of Electrical and Electronics Engineers, Inc.


Electrical and Computer Engineering

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Article - Journal

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Publication Date

01 Jan 1981