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Effect of humidity on partial discharge in a metal-dielectric air gap on machine insulation at trapezoidal testing voltages
KTH, School of Electrical Engineering (EES), Electromagnetic Engineering.
KTH, School of Electrical Engineering (EES), Electromagnetic Engineering.ORCID iD: 0000-0003-0759-4406
KTH, School of Electrical Engineering (EES), Electromagnetic Engineering.
2016 (English)In: Journal of Electrostatics, ISSN 0304-3886, E-ISSN 1873-5738, Vol. 83, 88-96 p.Article in journal (Refereed) Published
Abstract [en]

The atmospheric relative humidity (RH) has a great impact on the partial discharge (PD) process which can damage the insulation in operating machines. This work investigates how the relative humidity would affect the PD activities in a metal-dielectric air gap on machine insulation, which consists of mica, epoxy resin and glass-fiber, with the application of periodic alternating trapezoidal voltage waveforms. The results show that the PD characteristics, such as discharge amplitude, the average number of discharge pulses, can be varied greatly with the increasing humidity. This is mainly due to the increased surface conductivity in humid air.

Place, publisher, year, edition, pages
Elsevier, 2016. Vol. 83, 88-96 p.
Keyword [en]
Machine insulation, Partial discharge, Relative humidity, Surface charge decay, Surface conductivity, Dielectric materials, Electric conductivity, Epoxy resins, Insulation, Metal testing, Mica, Partial discharges, Silicate minerals, Average numbers, Discharge pulse, Metal dielectrics, Testing voltages, Voltage waveforms, Atmospheric humidity
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:kth:diva-195269DOI: 10.1016/j.elstat.2016.08.003ISI: 000384790400013ScopusID: 2-s2.0-84984850864OAI: oai:DiVA.org:kth-195269DiVA: diva2:1046356
Note

QC 20161114

Available from: 2016-11-14 Created: 2016-11-02 Last updated: 2016-12-14Bibliographically approved

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