The modelling of electric field, capacitance and dissipation factor of a high voltage bushing over varying frequency

D. J. Smith*, S. G. McMeekin, B. G. Stewart, P. A. Wallace

*Corresponding author for this work

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    12 Citations (Scopus)

    Abstract

    Within a high voltage substation, power transformer bushings are key components and an assessment of their condition is important to ensure operational reliability. Bushings represent a large proportion of transformer failures, where most issues are as a result of moisture ingress. Moisture ingress affects the distribution of the electric field and changes the capacitance and dissipation factor (tanδ) of the insulation. In this paper, a numerical model is built for an oil impregnated paper (OIP) condenser bushing. The simulated dielectric frequency response (DFR) dependence of transformer oil and OIP with varying moisture content is given. Simulations are made of the AC and very low frequency (approximated to DC) potential and electric field distributions. Furthermore, the capacitance and dissipation factor over a frequency range of between 1mHz to 1kHz is presented. The results are found to be consistent with typical bushing manufacturers' data.

    Original languageEnglish
    Title of host publication2012 47th International Universities Power Engineering Conference (UPEC)
    PublisherIEEE
    ISBN (Electronic)9781467328562
    ISBN (Print)9781467328548
    DOIs
    Publication statusPublished - 31 Dec 2012
    Event2012 47th International Universities Power Engineering Conference - London, United Kingdom
    Duration: 4 Sept 20127 Sept 2012
    Conference number: 47th

    Publication series

    NameProceedings of the Universities Power Engineering Conference

    Conference

    Conference2012 47th International Universities Power Engineering Conference
    Abbreviated titleUPEC 2012
    Country/TerritoryUnited Kingdom
    CityLondon
    Period4/09/127/09/12

    Keywords

    • bushing
    • capacitance
    • dielectric frequency response
    • dissipation factor
    • electric field
    • finite element method
    • high voltage

    ASJC Scopus subject areas

    • Energy Engineering and Power Technology

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