Influence of Phase Connection and Terminal Conditions on Natural Frequencies of Three-Phase Transformer Windings

Gururaj, BI and Jayaram, S and Chandrasekharaiah, HS (1968) Influence of Phase Connection and Terminal Conditions on Natural Frequencies of Three-Phase Transformer Windings. In: IEEE Transactions on Power Apparatus and Systems, PAS-87 (1). pp. 1-12.

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Abstract

With the increasing use of extra high-voltage transmission in power system expansion, the manufacturers of power apparatus and the electric utilities are studying the nature of overvoltages in power systems due to lightning and, in particular, switching operations. For such analyses, knowledge of the natural frequencies of the windings of transformers under a wide variety of conditions is important. The work reported by the author in a previous paper is extended and equivalent circuits have been developed to represent several sets of terminal conditions. These equivalent circuits can be used to determine the natural frequencies and transient voltages in the windings. Comparison of the measured and the computed results obtained with a model transformer indicates that they are in good agreement. Hence, this method of analysis provides a satisfactory procedure for the estimation of natural frequencies and transient voltages in transformer windings.

Item Type:	Journal Article
Publication:	IEEE Transactions on Power Apparatus and Systems
Publisher:	IEEE
Additional Information:	Copyright 1968 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.
Department/Centre:	Others
Date Deposited:	23 Feb 2012 10:18
Last Modified:	23 Feb 2012 10:18
URI:	http://eprints.iisc.ac.in/id/eprint/43104

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