电瓷避雷器Issue(2)：74-83,90,11.DOI:10.16188/j.isa.1003-8337.2025.02.010
华中地区500 kV架空线路复合绝缘子批量发热诊断分析研究
Diagnostic Analysis and Study on Batch Heating of Composite Insulators of 500 kV Overhead Lines in Central China
袁一钧 1李飞 2黄武鸿 3姜鹏 2巢亚锋 1廖振宇 1孙泽中 1尹芳辉 4陈宇3
作者信息
- 1. 国网湖南省电力有限公司电力科学研究院,长沙 410007
- 2. 国网湖南省电力有限公司衡阳供电公司,湖南 衡阳 421001
- 3. 国网湖南省电力有限公司超高压变电公司,长沙 410000||变电智能运检国网湖南省电力有限公司实验室,长沙 410000
- 4. 清华大学深圳国际研究生院,广东 深圳 518071
- 折叠
摘要
Abstract
In recent years,defects and failures of composite insulators have occurred frequently,among which the most important problem is the core bar crisp break caused by abnormal heating of composite in-sulator.In order to further study the relationship between string type,temperature rise and internal de-fects of insulators,the author takes 57 abnormal heating composite insulators of two 500 kV overhead lines in Central China as the research objects,and carries out 11 comprehensive tests including laboratory infrared detection,DR Detection and profile inspection.The results show that the composite insulators of this batch have serious defects of poor adhesion between the sheath and the core rod,which is the root cause of abnormal heating of insulators.At the same time,compact V-string insulators are subjected to forces and electric field strengths that result in a higher defect rate compared to the I-string.By compa-ring and analyzing the defects detected in a series of tests and the location of the defects,it is verified that infrared temperature measurement can more accurately detect the internal defects of composite insula-tors,and it is proposed that the temperature rise of 5 K is used as the criterion for serious defects of com-posite insulators of the Hunan Power Grid.However,DR Detection has high precision in detecting the defects of mandrel brittle and poor bonding,and can be considered as an auxiliary means of infrared tem-perature detection.关键词
复合绝缘子/异常发热/芯棒酥朽/红外测温/DR检测Key words
composite insulators/abnormal heating/core rod decay/infrared temperature measurement/DR testing引用本文复制引用
袁一钧,李飞,黄武鸿,姜鹏,巢亚锋,廖振宇,孙泽中,尹芳辉,陈宇..华中地区500 kV架空线路复合绝缘子批量发热诊断分析研究[J].电瓷避雷器,2025,(2):74-83,90,11.
