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Recording and processing of partial discharge signals

  • Electronics and Radio Engineering
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Abstract

Electromagnetic-activity signals that arise in an air discharge gap under the action of an alternating voltage at a frequency of 50 Hz were studied using an omnidirectional antenna, a measuring pulse transformer, and an oscilloscope. The frequency range with the maximum signal-to-noise ratio for partial discharge signals was determined. Partial discharges that cause a breakdown in the air discharge gap and that are identical in the apparent-discharge value to partial discharges in the polymer insulation were simulated using a system of surface-needle electrodes. Corona discharges were modeled. Amplitude-phase diagrams were constructed for distinguishing corona signals from partial-discharge signals. Model discharges made it possible to investigate the specific features of a polymer-insulation breakdown.

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Authors and Affiliations

  1. Kazan State Energy University, ul. Krasnosel’skaya 51, Kazan, 420066, Tatarstan, Russia

    A. M. Gataullin

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  1. A. M. Gataullin
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Correspondence to A. M. Gataullin.

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Original Russian Text © A.M. Gataullin, 2014, published in Pribory i Tekhnika Eksperimenta, 2014, No. 4, pp. 55–60.

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Gataullin, A.M. Recording and processing of partial discharge signals. Instrum Exp Tech 57, 426–430 (2014). https://doi.org/10.1134/S0020441214030166

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  • DOI: https://doi.org/10.1134/S0020441214030166

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