交流泄漏电流带电测试对MOA不同绝缘部件的故障检出效果差异研究  

Difference of Fault Detection Effect of AC Leakage Current Live Test Technology in Different Insulating Parts of MOA

作　　者：王清波 段永生 方勇 邹璟 路智欣 韦瑞峰 代正元 冉玉琦 赵荣普 陈永琴 王朝宇 吴尉民 WANG Qingbo;DUAN Yongsheng;FANG Yong;ZOU Jing;LU Zhixin;WEI Ruifeng;DAI Zhengyuan;RAN Yuqi;ZHAO Rongpu;CHEN Yongqin;WANG Chaoyu’WU Weimin(Kunming Power Supply Bureau of Yunnan Power Grid Co.,Ltd.,Kunming 650011,China)

机构地区：[1]云南电网有限责任公司昆明供电局,昆明650011

出　　处：《电瓷避雷器》2022年第3期19-25,共7页Insulators and Surge Arresters

基　　金：中国南方电网公司职工创新项目(编号:CSG-YNZC202105140024)。

摘　　要：运行电压下交流泄漏电流测试在金属氧化物避雷器技术监督中发挥着重要作用,同时在实际生产也存在一部分MOA无法通过交流泄漏电流带电测试发现隐患缺陷而造成损失的痛点。本研究提出一个设想:运行电压下交流泄漏电流带电测试技术对MOA不同绝缘部件上的故障检出效果不同。实验研究发现:因为避雷器整体的交流泄漏电流成分中,电阻片、瓷外套的占比较大,玻璃钢芯绝缘支撑杆、环氧树脂绝缘筒的占比非常小(<1%),所以运行电压下的交流泄漏电流测试可以有效检出电阻片和瓷外套上发生的故障,难以检出绝缘支撑杆(亦称绝缘芯杆或引拔棒)、绝缘筒(或绝缘包裹)上存在的故障。该研究清除一个避雷器安全运行的盲点,为避雷器状态检修提供参考,可提高避雷器的运行维护水平。Resistive current live test plays an important role in the technical supervision of metal oxide arrester. At the same time, there are some pain points that MOA can not find hidden dangers and defects through AC leakage current live test. The author puts forward an assumption: the AC leakage current live test technology under operating voltage has different fault detection effects on different insulating parts of MOA. It is found that in the overall AC leakage current composition of the arrester, the resistor and porcelain house account for a large proportion, and the proportion of FRP core insulating support rod and epoxy resin insulating cylinder is very small(< 1%), so the AC leakage current test under operating voltage can effectively detect the faults on the resistor and porcelain house, and it is difficult to detect the insulating support rod fault on insulating cylinder(or insulating package). The study clears a blind spot of the safe operation of the arrester, provides a reference for the condition based maintenance of the arrester, and improves the operation and maintenance level of the arrester.

关 键 词：金属氧化物避雷器 运行电压下交流泄漏电流 故障检出效果 玻璃钢芯绝缘支撑杆 环氧树脂绝缘筒 

分 类 号：TM862[电气工程—高电压与绝缘技术]