Title :
Dynamic electric strength of liquid perfluorodibutyl ether
Author :
Karpov, D.I. ; Kupershtokh, A.L. ; Palchikov, E.I.
Author_Institution :
Lavrentyev Inst. of Hydrodynamics, Acad. of Sci., Novosibirsk, Russia
Abstract :
An electric strength of perfluorodibutyl ether in small gaps between the hemispherical electrodes was investigated experimentally under AC voltage of linearly increasing amplitude. The influence of radius of hemispherical electrodes, gap lengths and also rate of voltage, increase on probability of breakdown initiation was investigated experimentally and theoretically. In the macroscopic stochastic approach proposed by A.L. Kupershtokh (1993, 1999, 2000 and 2001), breakdown initiation is described by macroscopic function of probability density of a streamer initiation μ(E). The fixed probability method was developed to reconstruct the function μ(E) using experimental data on series of breakdown voltages. The values of function μ(E) for perfluorodibutyl ether were determined in the range of electric field 0.4 to 0.9 MV/cm. Stochastic computer simulations of breakdown inception were carried out.
Keywords :
air gaps; electric breakdown; electric strength; electrodes; insulating oils; insulation testing; organic insulating materials; stochastic processes; AC voltage; breakdown initiation; dynamic electric strength; electrode gaps; fixed probability method; gap lengths; hemispherical electrodes radius; insulating properties; linearly increasing amplitude; liquid perfluorodibutyl ether; macroscopic stochastic approach; stochastic computer simulations; streamer initiation; Breakdown voltage; Computer simulation; Dielectric breakdown; Dielectric liquids; Dielectrics and electrical insulation; Electric breakdown; Electrodes; Hydrodynamics; Probability distribution; Stochastic processes;
Conference_Titel :
Science and Technology, 2002. KORUS-2002. Proceedings. The 6th Russian-Korean International Symposium on
Print_ISBN :
0-7803-7427-4
DOI :
10.1109/KORUS.2002.1028054
