摘要
近年来高压输电线路复合绝缘子异常发热频繁发生,对电网安全运行产生严重影响;但目前对其深入研究不够,通常把复合绝缘子异常发热同内绝缘缺陷简单对应,从而盲目采取更换等处理措施,造成人力物力极大浪费。为此,对某500 kV输电线路复合绝缘子大面积异常发热现象进行分析,通过试验分析发现其属于护套表面异常发热,与内绝缘缺陷无直接关联。试验结果表明:随着端部场强增大,异常发热温升增大,表层污秽去除后,异常发热现象消失。提出调整均压环配置来抑制复合绝缘子表层发热,通过带电作业方式实施后,现场运行复合绝缘子异常发热现象明显下降。
In recent years,abnormal heating phenomenon of high voltage composite insulator occurs frequently,which seriously affects the safe operation of power system. Currently,due to lack of deep understanding of abnormal heating,composite insulators which appear abnormal heat were replaced for which usually assumed to have inner insulation defect,this replacement wastes a great deal of human and material resources. Composite insulator samples in AC 500 k V line that had a large scale of abnormal heating were studied,and found that it was kind of sheath surface heating which has no relation with inner insulation defect. The results show that the temperature rise of the composite insulator increased with the rise of field intensity,and the temperature rise disappeared when pollution was washed out. By adjusting the position of the shielding rings of running composite insulators,the temperature rise of the composite insulator decreased significantly.
作者
黄振
张中浩
彭向阳
杨翠茹
王锐
吕鸿
王黎明
HUANG Zhen;ZHANG Zhonghao;PENG Xiangyang;YANG Cuiru;WANG Rui;LV Hong;WANG Liming(Electric Power Research Institute of Guangdong Power Grid Co.,Ltd.,Guangzhou 510080,China;Graduate School at Shenzhen,Tsinghua University,Shenzhen 518055,China)
出处
《电瓷避雷器》
CAS
北大核心
2020年第6期171-175,186,共6页
Insulators and Surge Arresters
关键词
复合绝缘子
表层发热
电场畸变
污秽
屏蔽深度
composite insulator
surface heating
electric field distortion
pollution
shield depth