In this paper, a fast method of evaluating the transient stability of power systems using a topological energy function is presented. This is applicable to the case when the load buses are uncoupled and for a class of nonlinear voltage dependent loads. A topological energy function (TEF), using centre of angle (COA) formulation, is used for computation of the stability region. A power Invariant transformation is presented which leads to the decoupling of load buses in a practical system with connected load buses. Although the load characteristics do not remain invariant under this transformation, approximations can be introduced to facilitate the analysis. A numerical example is precentod to illustrate the application of the method. © 1986 by Hemisphere Publishing Corporation.

Padiyar, K.R.Sastry, H.S.Y.2026-02-05Fast evaluElectric Machines and Power Systems, 1986, 11, 5, pp. 421-4410731356Xhttps://doi.org/10.1080/07313568608909198https://idr.nitk.ac.in/handle/123456789/281241986ELECTRIC NETWORKS - TransientsSYSTEM STABILITYCENTER OF ANGLE (COA)POWER FLOW EQUATIONSPOWER INVARIANT TRANSFORMATIONTOPOLOGICAL ENERGY FUNCTIONTRANSIENT STABILITYELECTRIC POWER SYSTEMSIn this paper, a fast method of evaluating the transient stability of power systems using a topological energy function is presented. This is applicable to the case when the load buses are uncoupled and for a class of nonlinear voltage dependent loads. A topological energy function (TEF), using centre of angle (COA) formulation, is used for computation of the stability region. A power Invariant transformation is presented which leads to the decoupling of load buses in a practical system with connected load buses. Although the load characteristics do not remain invariant under this transformation, approximations can be introduced to facilitate the analysis. A numerical example is precentod to illustrate the application of the method. © 1986 by Hemisphere Publishing Corporation.