Abstract
This paper presents the characteristics of partial and surface discharge on curvature of rod electrodes and gas pressure in a N2/O2 mixture gas in order to corroborate insulation technique applying to high voltage power equipment. AC surface discharge experiment was conducted to measure the voltage of partial and surface discharge with and without a solid dielectric in a non-uniform field. The measured results showed that the effect of the curvature on the characteristics of surface discharge and breakdown was different. On the other hand, partial discharge characteristics were similar to the surface discharge characteristics on the various curvatures in the condition with the solid dielectric. These phenomena were described based on high electric field and electron emission of the triple junction. In addition to the explanation of the phenomena, factors for the available insulation technique in composite insulation were provided from the analysis of the experiment results.
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