Pre-determination of partial discharge inception voltage in power cables using electrode gaps in air under AC voltage

P. Mohamed, Faisal and Siew, W. H. and Sheng, Bojie and Stewart, Brian G. and Morris, Euan A. (2017) Pre-determination of partial discharge inception voltage in power cables using electrode gaps in air under AC voltage. In: 21st IEEE International Conference on Pulsed Power, 2017-06-18 - 2017-06-22, the Hilton Metropole Hotel. (In Press)

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Abstract

The breakdown of insulation in cables while in service can cause considerable damage to equipment and the accessories to which they are connected. PD in cables arises due to the overstressing of cable insulation resulting from electric field enhancement caused by imperfections in cable core and screen. The nature and magnitude of PD activity depends upon the type of defect, aging, environmental factors, applied voltage and cable loading. Reduction in system voltage can potentially reduce PD, which will correspondingly extend the service life of the cable. Currently, industry voltage statutory requirements permit ±6% tolerance setting on nominal voltage on distribution networks. This ±6% voltage reduction on may have little or an adverse effect on PD magnitude depending on the nature of defect present in the cable. Hence there is a clear requirement to pre-determine the PD inception voltage in cables through laboratory experiments to understand the significance of voltage reduction. This means to verify the effect of voltage reduction on extinguishing or minimizing PD activity in cables. In this paper, range of voltages at which PD incepts termed as partial discharge inception voltage(PDIV) is measured using a test cell containing different types of electrode configuration having different spacing. PDIV measured using the test cell is verified by conducting partial discharge testing in paper insulated lead covered (PILC) and cross-linked poly ethylene(XLPE) cables. It has been found that PDIV measured using the test cell and cable are in good agreement.

  • Item type:Conference or Workshop Item(Paper)
    ID code:62446
    Dates:
    Date
    Event
    10 October 2017
    Published
    10 October 2017
    Accepted
    Notes:(c) 2017 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works.
    Subjects:Technology > Electrical engineering. Electronics Nuclear engineering
    Department:Faculty of Engineering > Electronic and Electrical Engineering
    Depositing user: Pure Administrator
    Date deposited:28 Nov 2017 11:13
    Last modified:21 Apr 2024 01:01
    Related URLs:
    URI:https://strathprints.strath.ac.uk/id/eprint/62446
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