Influence of Surface-Conductivity Nonuniformity on Charge Accumulation of GIS Downsized Model Spacer under DC Field Application

被引：37

作者：

Iwabuchi, Hiroyuki ^{[1
]}

Donen, Taiki ^{[1
]}

Matsuoka, Shigeyasu ^{[1
]}

Kumada, Akiko ^{[1
]}

Hidaka, Kunihiko ^{[1
]}

Hoshina, Yoshikazu

Takei, Masafumi

机构：

[1] Univ Tokyo, Tokyo 1138654, Japan

来源：

ELECTRICAL ENGINEERING IN JAPAN | 2012年 / 181卷 / 02期

关键词：

GIS; spacer; DC electric field; charge accumulation; numerical electric field computation; MECHANISM;

D O I：

10.1002/eej.22272

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

When a DC voltage is applied to an insulating spacer, the electric field distribution around it is determined by the resistivity of the material. Consequently, charges are accumulated on the surface of the insulator, and its breakdown voltage may become low. In this paper, the charge density distribution of the insulator is measured. The measured data indicate that the surface conductance is the main factor in charge accumulation. Therefore, the conductivity of the insulator is also measured, and the influence of the surface conductivity on charge accumulation is examined both experimentally and by numerical computation. It is confirmed that nonuniformity of surface conductivity is responsible for charge accumulation and the conductivity of the insulator in atmospheric-pressure SF6 is estimated to be sigma = 1 x 10(-18) Omega(-1). (C) 2012 Wiley Periodicals, Inc. Electr Eng Jpn, 181(2): 29-36, 2012; Published online in Wiley Online Library (wileyonlinelibrary.com). DOI 10.1002/eej.22272

引用

页码：29 / 36

页数：8

共 6 条

[1] MECHANISM AND EFFECT OF DC CHARGE ACCUMULATION ON SF6 GAS INSULATED SPACERS [J].