NDLI: High stress space charge limited current flow in dielectric oil under ramped voltage application

Content Provider	IEEE Xplore Digital Library
Author	Watson, A. Ren, D.H.
Copyright Year	1990
Description	Author affiliation: Dept. of Electr. Eng., Windsor Univ., Ont., Canada (Watson, A.; Ren, D.H.)
Abstract	A mathematical model for interpreting experimental data obtained from ramped voltage testing of transformer oil is presented. Current is perceived to flow alternately by convection and conduction when the electric field strength is high enough to initiate detrapping of electrons and field dissociation. Homopolar injection of electrons and positive ions is considered to delineate two regimes in which space-charge-limited current is directly related to a simple power of the applied potential. The injection process leads to the launching of solitary waves of the sine-Gordon type from each electrode and detrapping occurs within the wavefront of these. In direct response to this the remaining trapped electrons reorganize into a Beltrami flow field contained within small cells which coincide with the Debye spheres that are pertinent to the electrostatics of the free charge population. These cells act as quasiparticles passing through the dielectric liquid with which they interact to sustain the electrohydrodynamic flow which constitutes their drift motion as carriers in the applied field.<>
Starting Page	648
Ending Page	653
File Size	258849
Page Count	6
File Format	PDF
DOI	10.1109/CEIDP.1990.201411
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1990-10-28
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Stress Space charge Dielectrics Petroleum Mathematical model Testing Oil insulation Electrodes Electron traps Electrostatics
Content Type	Text
Resource Type	Article

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