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Localization of Radial Displacement in an Actual Isolated Transformer Winding-An Analytical Approach

Mukherjee, Pritam and Satish, L (2016) Localization of Radial Displacement in an Actual Isolated Transformer Winding-An Analytical Approach. In: IEEE TRANSACTIONS ON POWER DELIVERY, 31 (6). pp. 2511-2519.

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Official URL: http://dx.doi.org/10.1109/TPWRD.2016.2527839

Abstract

In this paper, a novel analytical method is developed to locate and assess the severity of a true radial displacement ( confined to 1 or 2 disk pairs) in an actual continuous-disk transformer winding. An analytical solution becomes possible mainly due to a simple manipulation of the system matrix, that is, to consider sum of the inverse squares of natural frequencies, instead of just the natural frequencies. This leads to an elegant expression that connects displacement location and its severity to changes in natural frequencies. For its implementation, short-circuit natural frequencies and variation of inductance as a function of winding length are the required inputs. Details of the derivation and experimental results are reported. In summary, it emerges that incipient and true radial displacements in an actual continuous-disk transformer winding can be localized with reasonable accuracy and a qualitative assessment of its severity is also possible.

Item Type: Journal Article
Additional Information: Copy right for this article belongs to the IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
Department/Centre: Division of Electrical Sciences > High Voltage Engineering (merged with EE)
Depositing User: Id for Latest eprints
Date Deposited: 07 Dec 2016 05:50
Last Modified: 07 Dec 2016 05:50
URI: http://eprints.iisc.ac.in/id/eprint/55525

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