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Estimation of Severity of Simulated Mechanical Damages in a Single Isolated Transformer Winding

Mukherjee, Pritam and Satish, L (2015) Estimation of Severity of Simulated Mechanical Damages in a Single Isolated Transformer Winding. In: International Conference on Condition Assessment Techniques in Electrical Systems (CATCON), DEC 10-12, 2015, Bengaluru, INDIA, pp. 231-235.

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Official URL: http://dx.doi.org/10.1109/CATCON.2015.7449541

Abstract

Transformer windings experience abnormal mechanical forces due to short-circuits occurring in its immediate network neighbourhood. The cumulative strain from these abnormal forces lead to winding damages. Occurrence of damages can be detected with high sensitivity using the well-known frequency response method. The damages most often manifest as a right or left shift of the peak/trough in the frequency response. It is beneficial to the operator looking at these shifts to know extent of severity of a damage, to enable taking a decision whether to continue operation of the transformer or not. Presently, there exists no such assistance. With this motivation, this paper proposes a new index that can effectively capture the severity of damage of any kind and be applicable to all kinds of windings. In this preliminary work, simulation results on a fully coupled ladder network along with practical measurements on a model-coil are presented to demonstrate efficacy of the proposed index to qualitatively capture the severity of a damage. In this preliminary work, damage is simulated as a discrete change in an element of the ladder network or model-coil.

Item Type: Conference Proceedings
Additional Information: Copy right for this article belongs to the IEEE, 345 E 47TH ST, NEW YORK, NY 10017 USA
Department/Centre: Division of Electrical Sciences > Electrical Engineering
Depositing User: Id for Latest eprints
Date Deposited: 08 Oct 2016 06:51
Last Modified: 08 Oct 2016 06:51
URI: http://eprints.iisc.ac.in/id/eprint/54791

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