Title :
Properties of streamers in transformer oil
Author :
Saker, A. ; Atten, P.
Author_Institution :
Lab. d´´Electrostatique et de Materiaux Dielectrique, CNRS, Grenoble, France
fDate :
12/1/1996 12:00:00 AM
Abstract :
The electrical characteristics of creeping discharges and single creeping streamers in transformer oil first are compared with those of streamers developing in the liquid bulk. The distribution of electric potential along the channel of a single negative creeping streamer is determined using a capacitive probe technique. Then the distribution of the space charge associated with each streamer channel is discussed and the electric field around the channels is estimated. A strong correlation between the mean potential gradient and the capacitance of the streamer channels is found. The different results and considerations tend to support the hypothesis of the same basic physical mechanism for both creeping discharges and streamers developing in the bulk
Keywords :
discharges (electric); space charge; transformer oil; bulk liquid; capacitive probe; creeping discharge; creeping streamer; electric field; electric potential; electrical characteristics; space charge; transformer oil; Dielectric liquids; Dielectrics and electrical insulation; Electric potential; Electric variables; Fault location; Oil insulation; Petroleum; Power transformer insulation; Solids; Surface discharges;
Journal_Title :
Dielectrics and Electrical Insulation, IEEE Transactions on
