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Partial Discharge Oscillograms and Pulse Distribution in Transformer Oil-Pressboard Insulation

Nerkar, YP and Kumar, Senthil S and Narayanachar, MN and Nema, RS (1999) Partial Discharge Oscillograms and Pulse Distribution in Transformer Oil-Pressboard Insulation. In: 1999 IEEE 13th International Conference on Dielectric Liquids, 1999. (ICDL '99), 20-25 July, Nara,Japan, 265 -268.


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Partial discharges cause degradation of insulation systems and a study of their behaviour can give useful information regarding the state of the insulation system. Partial discharge tests are therefore, carried out as quality checks for the insulation system. A model transformer insulation system consisting of pressboard and transformer oil with uniform field electrode arrangement was tested for its behaviour under partial discharges. The system was allowed to age until failure of the sample occurred in the form of a puncture. Records of partial discharge distributions were acquired along with oscillograms. Oscillograms help in the traceability of the measurement when compared with distributions. A comparative study of the effect of amplifier setting and the pulse repetition rate on the partial discharge distributions and the oscillograms acquired during ageing of the sample has been presented. It is shown that by appropriate threshold on the distribution, distinctive features can be extracted.

Item Type: Conference Paper
Publisher: IEEE
Additional Information: Copyright 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.
Department/Centre: Division of Electrical Sciences > High Voltage Engineering (merged with EE)
Date Deposited: 07 Mar 2006
Last Modified: 19 Sep 2010 04:24
URI: http://eprints.iisc.ac.in/id/eprint/5777

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