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On-line Dynamic Security Assessment: Determination of Critical Transmission Lines

Krishna, S and Padiyar, KR (2010) On-line Dynamic Security Assessment: Determination of Critical Transmission Lines. In: Electric Power Components and Systems, 38 (2). pp. 152-165.

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Abstract

The main objective of on-line dynamic security assessment is to take preventive action if required or decide remedial action if a contingency actually occurs. Stability limits are obtained for different contingencies. The mode of instability is one of the outputs of dynamic security analysis. When a power system becomes unstable, it splits initially into two groups of generators, and there is a unique cutset in the transmission network known as critical cutset across which the angles become unbounded. The knowledge of critical cutset is additional information obtained from dynamic security assessment, which can be used for initiating preventive control actions, deciding emergency control actions, and adaptive out-of-step relaying. In this article, an analytical technique for the fast prediction of the critical cutset by system simulation for a short duration is presented. Case studies on the New England ten-generator system are presented. The article also suggests the applications of the identification of critical cutsets.

Item Type: Journal Article
Additional Information: Copyright for this article belongs to Taylore and Francis.
Keywords: critical cutset; mode of instability; transient stability
Department/Centre: Division of Electrical Sciences > Electrical Communication Engineering
Date Deposited: 02 Feb 2010 07:17
Last Modified: 19 Sep 2010 05:54
URI: http://eprints.iisc.ernet.in/id/eprint/25490

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