PD-Detection vs. Loss Measurements at High Voltages with variable frequencies

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    Partial discharge-activity (PD) in internal voids in epoxy plastic was measured at AC voltages from below inception to 3 times inception with variable frequencies in the range 0.1 to 100Hz.The results from phase/height analyses were compared to dielec-tric loss measurements and related to the applied voltage and frequency. The character of PD-patterns changed only slightly with voltage and frequency, whereas the apparent charge per cycle was lowest for 50Hz and 100Hz applied voltage. Tand changed with voltage and frequency and the tip-up caused by the inception of internal discharges almost disappeared at low frequencies.The consequences of non-consistent apparent charge and the missing tand tip-up will be discussed with respect to application of low frequency methods on high voltage components.
    Original languageEnglish
    Title of host publicationProceedings of 10th Int. Symposium on High Voltage Engineering
    Place of PublicationMontreal
    Publication date1999
    Publication statusPublished - 1999
    Event10th International Symposium on High Voltage Engineering - Montreal, Canada
    Duration: 25 Aug 199729 Aug 1997
    Conference number: 10


    Conference10th International Symposium on High Voltage Engineering

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