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Prediction of Hottest Spot Temperature (HST) in Power and Station Transformers

Pradhan, MK and Ramu, TS (2003) Prediction of Hottest Spot Temperature (HST) in Power and Station Transformers. In: IEEE Transactions on Power Delivery, 18 (4). 1275 -1283.

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Abstract

The degradation of electrical insulation in transformers is more often due to thermal stress. In this paper, the authors attempted to work out a method of assessing the magnitude of temperature and the hottest region in the body of a large transformer with a reasonable degree of accuracy. A theoretical model has been developed based on the boundary value problem of heat conduction in transformer winding using finite integral transform techniques. The model requires, in addition to electrical parameters of the transformer, information on the actual design data. The authors believe that this model predicts HST with precision and also indicates a possibility of online data acquisition.

Item Type: Journal Article
Additional Information: ©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: Finite transforms;H S location;Heat transfer; IEEE loading guide;Oil impregnated paper;Prediction accuracy
Department/Centre: Division of Electrical Sciences > High Voltage Engineering (merged with EE)
Date Deposited: 21 Dec 2005
Last Modified: 19 Sep 2010 04:22
URI: http://eprints.iisc.ernet.in/id/eprint/4699

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