Influences of Electric-Field Distribution Along the String on the Aging of Composite Insulators

被引：29
|
作者：
Tu, Youping [1 ]
Zhang, Hui [1 ]
Xu, Zhuo [1 ]
Chen, Jingjing [1 ]
Chen, Conghui [1 ]
机构：
[1] North China Elect Power Univ, State Key Lab Alternate Elect Power Syst Renewabl, Key Lab Power Syst Protect & Dynam Secur Monitori, Minist Educ, Beijing 102206, Peoples R China
来源：
IEEE TRANSACTIONS ON POWER DELIVERY | 2013年 / 28卷 / 03期
基金：
中国国家自然科学基金;
关键词：
Composite insulators; contact angle; electric-field distribution; hydrophobicity; thermally stimulated current (TSC); CORONA; PERFORMANCE;
D O I：
10.1109/TPWRD.2013.2244103
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：
This paper studies the uneven aging of the composite insulators along the string caused by the nonuniform electric-field distribution. Sheds along the string of two 110-kV composite insulators with varied operation time on transmission lines are analyzed systematically by means of hydrophobicity and thermally stimulated current (TSC) tests, and the aging characteristics of different part of the axial sheds are compared. This paper studies the influences of the electric-field distribution along the string on the aging of composite insulators, combined with the results of electric-field simulation and electric aging tests. Results show that the higher the electric-field strength is, the worse the hydrophobicity of composite insulators surface is and the larger the amount of trap charge is. The study suggests the nonuniform electric-field distribution is the main reason for the uneven aging of the sheds along the composite insulators string.
引用
收藏
页码：1865 / 1871
页数：7
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