Partial discharge transients and the influence of dielectric polarization

A. Pedersen, George C Crichton, Iain Wilson McAllister

    Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

    Abstract

    Based on a field-theoretical approach, a physically valid theory of partial discharge transients has been developed. The theory is based upon the concept of the charge induced upon the detecting electrode by the partial discharge. This induced charge is shown to be composed of a component associated with the actual space charge in the void, and one related to changes in the bulk polarization due to this space charge. In the present article, the magnitude of the induced charge and its components are investigated for both homogeneous and heterogeneous dielectric systems. In the former void shape is considered. In the latter, the void shape is restricted to one of spherical form. For each system the magnitude of the induced charge is found to be strongly influenced by changes in the bulk polarization. In the former, the polarization component depends dramatically on void shape. In the heterogeneous, void location is shown to be a crucial factor.
    Original languageEnglish
    Title of host publicationNORD-IS 96, Nordic Insulation Symposium
    Place of PublicationTrondheim
    PublisherNorwegian University of Science and Technology
    Publication date1996
    Pages71-81
    Publication statusPublished - 1996
    EventNordic Insulation Symposium 1996 - Bergen, Norway
    Duration: 10 Jun 199612 Jun 1996

    Conference

    ConferenceNordic Insulation Symposium 1996
    CountryNorway
    CityBergen
    Period10/06/199612/06/1996

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