高电压技术2011，Vol.37Issue(3)：732-738,7.
绝缘子表面电场及电荷的测量
Measurements of Electric Field and Charge on Insulator Surface
王新新 1刘微粒 1王强 1朱宏林 1邹晓兵1
作者信息
- 1. 清华大学电机工程与应用电子技术系电力系统及发电设备控制和仿真国家重点实验室,北京,100084
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摘要
Abstract
It is well known that the flashover voltage of an insulator between two electrodes is much lower than the breakdown voltage of the same gap in the absence of insulator. The reduced value of the breakdown voltage is gener ally attributed to the surface charging of the insulator and resulting inter-electrode field modification. In order to cor rectly design an insulator, it is desirable to measure the distribution of the electric charge and field on the insulator surface. Consequently, the techniques for the measurements of the electric charge and field on an insulator surface are reviewed. Field-emitted electrons, partial discharge, dielectric interface polarization, variations in bulk or sur face conductivity, non-linear field-dependent conductivity, and metallic particles are responsible for the charge accu mulation on insulator surface. Three techniques for the measurements of the electric charge and field on the insulator surface are described and compared, including capacitive probe, dust figure and electro-optical measurement based on Pockels effect or Kerr effect.关键词
绝缘子/表面电场/表面电荷/静电探头/粉尘图法/电光法Key words
insulator/ surface field/ surface charge/ capacitive probe/ dust figure/ electro-optical method分类
信息技术与安全科学引用本文复制引用
王新新,刘微粒,王强,朱宏林,邹晓兵..绝缘子表面电场及电荷的测量[J].高电压技术,2011,37(3):732-738,7.
