Surface flashover breakdown mechanisms on liquid immersed dielectrics
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APL1_rev4.pdf
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Author(s)
Jadidian, Jouya
Zahn, Markus
Lavesson, Nils
Widlund, Ola
Borg, Karl
Date Issued
April 2012
Journal
Applied Physics Letters
Publisher
American Institute of Physics (AIP)
Citation
Jadidian, Jouya, Markus Zahn, Nils Lavesson, Ola Widlund, and Karl Borg. Surface Flashover Breakdown Mechanisms on Liquid Immersed Dielectrics. Applied Physics Letters 100, no. 17 (2012): 172903. doi:10.1063/1.4705473.
Version
Author's final manuscript
Abstract
Flashover formation and expansion mechanisms on the surfaces of different dielectrics immersed in transformer oil have been numerically analyzed. Streamers emanating from a needle electrode tend to transform to surface flashovers if the immersed dielectric permittivity is higher than the liquid permittivity and/or the dielectric interfacial surface cuts the path of the streamer. Perpendicular interface of the immersed dielectric impedes the breakdown by deflecting the streamer and slowing down the surface flashover. The parallel dielectric interface, however, assists the breakdown by regulating the surface flashover velocity to an approximately constant value (∼10 km/s).
MIT Department
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
Massachusetts Institute of Technology. Research Laboratory of Electronics
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Creative Commons Attribution-Noncommercial-Share Alike 3.0
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DOI of Published Version
https://doi.org/10.1063/1.4705473
