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On-Line Detection of Loss of Synchronism Using Locally Measurable Quantities

Padiyar, KR and Krishna, S (2001) On-Line Detection of Loss of Synchronism Using Locally Measurable Quantities. In: Transmission and Distribution Conference and Exposition, 2001 IEEE/PES, 28 October-2 November, Atlanta,GA, Vol.1, 537 -542.


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Maintaining dynamic security of a power system subjected to large disturbances is of utmost importance. Fast and accurate on-line detection of instability is essential in initiating certain emergency control measures. The techniques reported in the literature involve mainly application of global phasor measurements and heuristic algorithms. In this paper, an accurate technique for the on-line detection of loss of synchronism based on voltage and current measurements in a line is presented. The technique makes use of the concept of potential energy in a line. The conditions for the system instability are derived from energy function analysis. However no assumptions are made regarding the power-angle relationship in a line, nor any data on the system equivalents are necessary in implementing the detection scheme which is simple and requires only local measurements.

Item Type: Conference Paper
Publisher: IEEE
Additional Information: Copyright 1990 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Keywords: On-line detection of loss of synchronism;System protection;Transient stability
Department/Centre: Division of Electrical Sciences > Electrical Engineering
Date Deposited: 13 Feb 2006
Last Modified: 19 Sep 2010 04:23
URI: http://eprints.iisc.ac.in/id/eprint/5322

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