SURFACE DISCHARGE SIMULATION INSF6ANDN2MIXTURES WITH A PLASMACHEMICAL MODEL

Wenxia Sima, Jian Shi () and Qing Yang
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Wenxia Sima: State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Shapingba District, Chongqing 400044, P. R. China
Jian Shi: State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Shapingba District, Chongqing 400044, P. R. China
Qing Yang: State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Shapingba District, Chongqing 400044, P. R. China

Surface Review and Letters (SRL), 2014, vol. 21, issue 01, 1-9

Abstract: SF6–N2mixtures are becoming the best alternative forSF6in electrical systems. Plasmachemical modeling and the results of a positive surface streamer are reported in this paper. The model exhibits excellent streamer transition from the gas gap to the insulator surface. The surface charge accumulations on the dielectric insulators are compared and discussed. Results showed that the density of negative ions is much larger than that of electrons in the surface streamer channel. The dominant${\rm SF}_{6}^-{$}and less pronounced${\rm SF}_{5}^-{$}constitute the main negative ions in the electronegative surface streamer because of the strong electron attachments toSF6molecules.

Keywords: Plasmachemical; surface streamer; surface charge accumulation; permittivity; electronegative plasma (search for similar items in EconPapers)
Date: 2014
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Citations: View citations in EconPapers (1)

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DOI: 10.1142/S0218625X14500103

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