Partial discharges in a cavity at variable applied frequency part 2: Measurements and modeling
2008 (English)In: IEEE transactions on dielectrics and electrical insulation, ISSN 1070-9878, E-ISSN 1558-4135, Vol. 15, no 6, 1610-1616 p.Article in journal (Other academic) Published
In this paper partial discharges (PD) in a disc-shaped cavity are measured at variable frequency (0.01 - 100 Hz) of the applied voltage. The measured PD phase and magnitude distributions, as well as the number of PDs per voltage cycle, changed with the varying frequency. A charge consistent model is presented and used to dynamically simulate the sequence of PDs in the cavity. The simulation results show that the properties of the cavity surface, mainly the surface conductivity and the surface emission of electrons, change with the varying applied frequency. This is interpreted as an effect of the difference in time between consecutive PDs at different applied frequencies. This is the second of two papers addressing the frequency dependence of PD in a cavity. The first paper described how the PD frequency dependence changes with the applied voltage amplitude, the cavity size and the cavity location.
Place, publisher, year, edition, pages
2008. Vol. 15, no 6, 1610-1616 p.
partial discharges; measurements; modeling; variable frequency; cavities; disc-shaped; polycarbonate
Other Electrical Engineering, Electronic Engineering, Information Engineering
IdentifiersURN: urn:nbn:se:kth:diva-8461DOI: 10.1109/TDEI.2008.4712664ISI: 000261308800017ScopusID: 2-s2.0-58149114581OAI: oai:DiVA.org:kth-8461DiVA: diva2:13790
QC 20100722. Updated from submitted to published, QC 20120314. Previous title: Measurement and Modeling of Partial Discharges in a Cavity at Variable Applied Frequency2008-05-162008-05-162012-03-14Bibliographically approved