PD characteristics and mechanisms in artificial air-filled voids at room and liquid nitrogen temperatures

Authors
Tsuru, S Nakamura, M Mine, T Sakai, K Suehiro, J Hara, M
Citation
S. Tsuru et al., PD characteristics and mechanisms in artificial air-filled voids at room and liquid nitrogen temperatures, IEEE DIELEC, 6(1), 1999, pp. 43-50
Citations number
18
Categorie Soggetti
Eletrical & Eletronics Engineeing
Journal title
IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION
ISSN journal
10709878 → ACNP
Volume
6
Issue
1
Year of publication
1999
Pages
43 - 50
Database
ISI
SICI code
1070-9878(199902)6:1<43:PCAMIA>2.0.ZU;2-V
Abstract
In this study, partial discharge (PD) characteristics in artificial air-fil led voids at room and liquid nitrogen temperatures were investigated experi mentally. It was found that minimum PD inception voltage at liquid nitrogen temperature (77 K) decreased with decrease in ambient temperature due to c ondensation of oxygen in the void. By observation of PD current pulses and light images, it was found that there were three modes of discharge: stream er, Townsend and glow-like discharges in PD at room and liquid nitrogen tem peratures. Especially the mode at liquid nitrogen temperature changes marke dly with the stress time.