Effect of voltage reduction in minimising partial discharge activity in cables - experimental study

Faisal Peer Mohamed, W. H. Siew, Bojie Sheng, Brian Stewart

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

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Abstract

A common cause of insulation degradation in high voltage (HV) cables is due to partial discharges (PD). PD may be initiated through imperfections and contaminants present in the insulation. It can be hypothesized that a 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. Such ±6% voltage reduction on may have little or adverse effect on PD magnitude which depends on the nature of defect. Hence the accuracy and type of measuring PD while reducing system voltage is more critical for this application. Power cable as a low pass filter which attenuates and disperse the PD pulses. In this paper effect of voltage reduction on PD is investigated using standard electrode geometries such as point-plane, point-point and point- rod using IEC60270 measurement system together with frequency domain measurements. It has been observed that PD frequency characteristics at different voltages varies in the wideband frequency spectrum.

Original languageEnglish
Title of host publicationCEIDP 2017 - IEEE Conference on Electrical Insulation and Dielectric Phenomenon
Place of PublicationPiscataway, N.J.
PublisherIEEE
Pages331-334
Number of pages4
ISBN (Print)9781538611944
DOIs
Publication statusPublished - 12 Jan 2018
Event2017 IEEE Conference on Electrical Insulation and Dielectric Phenomenon, CEIDP 2017 - Texas, United States
Duration: 22 Oct 201725 Oct 2017

Conference

Conference2017 IEEE Conference on Electrical Insulation and Dielectric Phenomenon, CEIDP 2017
CountryUnited States
CityTexas
Period22/10/1725/10/17

Keywords

  • partial discharge
  • voltage reduction
  • power cables
  • insulation degradation
  • nominal voltage

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    Research Output

    Effect of voltage reduction in minimising partial discharge activity in cables – experimental study

    Siew, W. H., Peer Mohamed, F., Sheng, B. & Stewart, B., 22 Oct 2017.

    Research output: Contribution to conferencePoster

  • Cite this

    Mohamed, F. P., Siew, W. H., Sheng, B., & Stewart, B. (2018). Effect of voltage reduction in minimising partial discharge activity in cables - experimental study. In CEIDP 2017 - IEEE Conference on Electrical Insulation and Dielectric Phenomenon (pp. 331-334). IEEE. https://doi.org/10.1109/CEIDP.2017.8257515