Investigation on surface charge distribution inside of cylindrical alumina insulator of vacuum bulb under AC voltage application

Fukuda, Hideaki; Ishikawa, Keita; Yamamura, Kenta; Sano, Akira; Yoshida, Ryo; Yamano, Yasushi; Yamamoto, Osamu

doi:10.1109/deiv.2016.7748684

Cited by 5 publications

(1 citation statement)

References 4 publications

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“…H. Fujinami et al have reported that the normal component of electric field was reduced along the surface of insulator with optimized shape by which the charge accumulation could be limited [4]. Fukuda et al have demonstrated that the shield rings at both ends of the insulator could mitigate the electric field distortion near the triple junctions (TJ) and surface charge density was reduced [5]. Mohamad et al have found that the conductivity along the surface of epoxy was enhanced by fluorination treatment, which led to the enhancement of charge dissipation rate.…”

Section: Introductionmentioning

confidence: 99%

Graphene Oxide Addition With Low Fraction Improving Surface Charge Inhibition Performance of Epoxy/SiC Coating Under DC Stress

et al. 2020

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Surface charge accumulation under DC stress is a critical factor in reducing the insulation performance of epoxy-based nanocomposite. Surface coating has been used to inhibit the charge accumulation, but the inhibition mechanism of the coating material is still unclear. In this paper, graphene oxide (GO) and silicon carbide (SiC) have been selected as fillers to prepare the coating material with epoxy as the base material. The role of GO on surface charge inhibition performance of epoxy/SiC coating has been estimated. The test results showed that the charge inhibition performance and the flashover voltage increase with the growth of nano-SiC content from 1 wt% to 5 wt% in the epoxy/SiC coating. As regards the epoxy/(SiC+GO) coating, the charge inhibition performance and flashover voltage reduce as the SiC content increases. It is suggested that the charge inhibition performance of epoxy/SiC coating can be improved with a low content addition of GO. The variation of trap distribution in the coating material caused by the GO should be responsible for the enhanced charge inhibition behavior. INDEX TERMS Epoxy/Al 2 O 3 nanocomposite, surface charge, coating, graphene oxide, SiC, trap distribution.

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Section: Introductionmentioning

confidence: 99%