Measured Partial Discharge Inception Voltage for a Cavity at Different Applied Frequencies
2007 (English)In: Nordic Insulation Symposium (Nord-IS 07), 2007, 59-62 p.Conference paper (Refereed)
Partial discharges (PD) can be measured at variable frequency of the applied voltage. The interpretation of such measurements requires a physical understanding of the observed PD frequency dependence. This paper studies the influence of the applied frequency on the partial discharge inception voltage (PDIV). The PDIV is measured for insulated disc-shaped cavities at applied frequency in the range 0.1 to 100 Hz. It is found that the PDIV increases with increasing applied frequency, probably as an effect of the statistical time lag. In addition, the measured PDIV is lower than that predicted by Paschens’s law. The effect of preexcitation on PDIV is also studied. A period without voltage supply prior to each PDIV measurement is seen to cause a faster increase in the PDIV with frequency.
Place, publisher, year, edition, pages
2007. 59-62 p.
Other Electrical Engineering, Electronic Engineering, Information Engineering
IdentifiersURN: urn:nbn:se:kth:diva-8458OAI: oai:DiVA.org:kth-8458DiVA: diva2:13787
QC 201007222008-05-162008-05-162010-07-22Bibliographically approved