Szczegóły publikacji

Opis bibliograficzny

Autorzy (4)

• Florkowski Marek
• AGHFlorkowska Barbara
• AGHKuniewski Maciej
• AGHZydroń Paweł

Słowa kluczowe

Dane bibliometryczne

ID BaDAP	126424
Data dodania do BaDAP	2019-12-20
DOI	10.1007/978-3-030-31680-8_3
Rok publikacji	2020
Typ publikacji	fragment książki
Otwarty dostęp
Wydawca	Springer
Czasopismo/seria	Lecture Notes in Electrical Engineering

Abstract

This paper presents comparison of effective discharge area in voids in different insulating materials based on surface resistance. Effective discharge area is defining spots where partial discharges are likely to occur. The changes of surface resistance can be treated as indicator of the discharge process inside the void. The electrical mid-time aging stress was subjected to selected different insulating specimens: Cable insulating paper, epoxy impregnated paper and machine insulation such as polyester film and mica-epoxy. Comparison of untreated and aged surface resistance reflects the energetic impact of discharges. Discharges in void lead to changes of various attributes: Macroscopic surface conditions, such as roughness or morphology, as well as in physical properties, such as charge accumulation and transport, bulk and surface conductivity. Surface conductivity is crucial because it influences the decay of deposited charges and hence the long term inception conditions in a void. Both effects, i.e. different surface erosion spots and different surface attributes such as resistance or roughness profiles indicate the formation of local centers on the void wall with a weakened structure. Those spots might be the origins in the long term stress of the bulk penetration and further development of the discharge channel. © Springer Nature Switzerland AG 2020.

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