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Phase Window Analysis of Partial Discharges in an Oil Pressboard Insulation System

Raja, K and Narayanachar, MN and Nema, RS (1996) Phase Window Analysis of Partial Discharges in an Oil Pressboard Insulation System. In: IEEE 1996 Annual Report of the Conference on Electrical Insulation and Dielectric Phenomena, 20-23 October, Millbrae,California,USA, Vol.1, 174 -177.


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Partial discharge (PD) distributions have been studied in a representative oil-pressboard insulation system using a phase resolved PD analyzer built for the purpose. The system divided a cycle of the applied voltage, starting from the zero of positive half cycle, into sixteen equal phase windows (Φ1 to Φ16) to determine the discharge magnitude in each phase. PD data are recorded according to their phase of occurrence with respect to the power frequency cycle, their magnitude and number over a period of time. The effect of different test procedures, stress levels and its duration on the ensuing PD patterns have been statistically studied. The results of the analysis help in identifying the probable phase windows which have significant contribution towards overall aging and the ensuing PD distribution patterns.

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: 25 Aug 2008
Last Modified: 19 Sep 2010 04:26
URI: http://eprints.iisc.ac.in/id/eprint/6605

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