Szczegóły publikacji

Opis bibliograficzny

Autorzy (4)

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

Dane bibliometryczne

ID BaDAP	117434
Data dodania do BaDAP	2018-10-22
Tekst źródłowy	URL
DOI	10.1109/ICHVE.2018.8642021
Rok publikacji	2018
Typ publikacji	materiały konferencyjne (aut.)
Otwarty dostęp
Wydawca	Institute of Electrical and Electronics Engineers (IEEE)
Konferencja	2018 IEEE International Conference on High Voltage Engineering and Application

Abstract

In this paper a novel approach of mapping discharge clusters inside a void in high voltage insulating material, is presented. Operating conditions in the high electric field, with long-lasting exposition, promote formation of local defects being sources of partial discharges, resulting in surface erosion and origination of locally eroded hotspots. Certain class refers to surface effects in the discharge sources, denoted as voids and following surface recombination processes. Discharges occur in localized spots creating so called effective discharge surface. Research was focused on assessment of the changes of surface properties of investigated dielectric material in long term test in flat gaseous inclusions with a diameter much bigger than thickness of the void. The presented experiments were performed on Nomex paper, designed for high voltage applications, including motor conductor coil wrap and transformer layer insulation. Partial discharges cause thermal effects and temperature rise around discharge clusters leading to dielectric material degradation and local variations of surface resistivity. The electrode setup created homogenous electric field distribution. The aging test consisted of the sequence of substages, with total duration equal to 240 hours.The goal of the experiment was to identify discharge channels by mapping of surface resistivity inside voids, using multipoint method. © 2018 IEEE.

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