In practice, High-voltage (HV) cables are occasionally exposed to impulse and superimposed transient conditions, which may initiate partial discharges (PD) temporarily. Whether such PDs persist under AC voltage after the transient conditions have vanished, is at focus in the research described in this paper. Since for cross-linked polyethylene (XLPE) cables the accessories are weak links in the HV cable insulation system, we investigated the PD behavior of an artificial joint defect in a HV cable model under impulse and superimposed voltages. By applying a dedicated PD measuring system it was found that, the impulse and superimposed voltages can initiate PD in the artificial defect, which under local electrical field conditions can persist for some time. The different parameters of the applied voltages have different effects on the PD behavior.
Original languageEnglish
Article number106027
Number of pages11
JournalInternational Journal of Electrical Power & Energy Systems
Publication statusPublished - 3 Apr 2020

    Research areas

  • High-voltage cross-linked polyethylene (XLPE) cable model joint defect, Impulse voltage, Partial discharge (PD), Superimposed voltage

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