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Effects of spatial restriction on streamers in white oil

Effects of spatial restriction on streamers in white oil

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Sammendrag
Streamer propagation guided within PTFE tubes were investigated in an 8 cm point-plane gap in white oil. Both positive and negative polarities were studied with a near step voltage of 50-400 kV. Streamers in a free volume were compared with those in tubes. Within tubes, branching of streamers is suppressed, and interaction between streamers and tube wall may occur. For positive streamers, the guiding tube slightly accelerates streamers and reduces acceleration voltage. However, for negative streamers the tube significantly increases the velocity and drastically decreases the acceleration voltage. Possibly, streamer propagation is governed by the streamers tip-field. When the interaction between streamers and the tube wall appears, the electric field at the streamer tip is increased. This leads to an increase in streamer velocity. The mechanism of streamer propagation is discussed.
Språk
Engelsk
Forfatter(e)
Institusjon(er)
  • Vietnam
  • SINTEF Energi AS / Elkraftteknologi
  • Norges teknisk-naturvitenskapelige universitet
  • Sverige
År
2014
Publisert i
Proceedings of IEEE International Conference on Dielectric Liquids
ISSN
2153-3725
Forlag
Curran Associates, Inc.
Bok
2014 IEEE 18th International Conference on Dielectric Liquids ICDL
Hefte nr.
2014
ISBN
9781479920655