超高压输电线路合成绝缘子芯棒发热缺陷成因分析及带电更换方法  

Cause Analysis of Heating Defect of Synthetic Insulator Core Rod in EHV Transmission Line and Its Hot-Line Replacement Method

作　　者：熊继开 唐嘉晖 张鼎 金哲 朱传刚 葛雄 雷雨 楚江平 张晓春 李嗣 XIONG Jikai;TANG Jiahui;ZHANG Ding;JIN Zhe;ZHU Chuangang;GE Xiong;LEI Yu;CHU Jiangpin;ZHANG Xiaochun;LI Si(EHV Company,State Grid Hubei Electric Power Co.,Ltd.,Wuhan Hubei 430072,China)

机构地区：[1]国网湖北省电力有限公司超高压公司,湖北武汉430072

出　　处：《湖北电力》2024年第5期114-122,共9页Hubei Electric Power

基　　金：国网湖北省电力有限公司科技项目(项目编号:52152024000B)。

摘　　要：随着合成绝缘子在超特高压输电中的广泛应用,其老化问题逐渐突出,绝缘子芯棒发热缺陷成为影响线路稳定运行的重要隐患。针对500kV超特高压输电线路中的合成绝缘子芯棒发热缺陷,基于典型案例进行了深入分析。通过无人机红外测温技术,识别出绝缘子表面异常温升现象,并结合外观检查、憎水性试验及剖检试验,系统探讨了发热缺陷的成因及影响因素,提出了有效的排查和带电消缺方法,并通过组合间隙核算与承力工具的合理选择,确保了带电更换合成绝缘子的安全性与效率。研究结果为超高压输电线路合成绝缘子芯棒发热的应对提供了理论支持和技术指导,保障了电力系统的长期稳定运行。With the wide application of synthetic insulators in EHV/UHV transmission,the aging problem is becoming more and more prominent,and the heating defect of insulator core rod has become an important hidden danger affecting the stable operation of the line.Based on typical cases,this paper analyzes in depth the heating defects of synthetic insulator core rod of 500 kV EHV transmission lines.Through the infrared temperature measure technology of UAV,the abnormal temperature rise phenomenon of insulator surface is identified,and the causes and influencing factors of heating defects are systematically discussed in combination with appearance inspection,hydrophobicity test and dissection test.In addition,effective methods of investigation and live defect elimination are put forward,and the safety and efficiency of live replacement are also ensured by combining gap calculation and reasonable selection of bearing tools.The research results provide theoretical support and technical guidance for coping with the heating of synthetic insulator core rod of extra-high voltage transmission lines,thus ensuing the long-term stable operation of the power system.

关 键 词：超特高压输电 合成绝缘子 绝缘子芯棒 发热缺陷 红外测温 憎水性试验 剖检试验 无人机 

分 类 号：TM75[电气工程—电力系统及自动化]