SURFACE DISCHARGE SIMULATION IN SF6 AND N2 MIXTURES WITH A PLASMACHEMICAL MODEL

被引：3

作者：

Sima, Wenxia ^{[1
]}

Shi, Jian ^{[1
]}

Yang, Qing ^{[1
]}

机构：

[1] Chongqing Univ, State Key Lab Power Transmiss Equipment & Syst Se, Chongqing 400044, Peoples R China

来源：

SURFACE REVIEW AND LETTERS | 2014年 / 21卷 / 01期

基金：

中国国家自然科学基金;

关键词：

Plasmachemical; surface streamer; surface charge accumulation; permittivity; electronegative plasma; FLUID MODELS; STREAMER; ELECTRON; AIR; PROPAGATION; IONIZATION; BREAKDOWN;

D O I：

10.1142/S0218625X14500103

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

SF6-N-2 mixtures are becoming the best alternative for SF6 in 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 SF6- and less pronounced SF5- constitute the main negative ions in the electronegative surface streamer because of the strong electron attachments to SF6 molecules.

引用

页数：9

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