局部放电测试对金属氧化物避雷器阀片缺陷的敏感度分析  

Analysis on Sensitivity of Partial Discharge Test of Defects of MOA Valve Plate

作　　者：杨谨铭 潘浩 马御棠 马仪 周仿荣 钱国超 文刚 孙再超 YANG Jinming;PAN Hao;MA Yutang;MA Yi;ZHOU Fangrong;QIAN Guochao;WEN Gang;SUN Zaichao(Joint Laboratory of Power Remote Sensing Technology,Electric Power Research Institute of Yunnan Power Grid Co.,Ltd.,Kunming 650217,China;Lincang Power Supply Bureau,Yunnan Power Grid Co.,Ltd.,Lincang,Yunnan 677000,China)

机构地区：[1]电力遥感技术联合实验室(云南电网有限责任公司电力科学研究院),昆明650217 [2]云南电网有限责任公司临沧供电局,云南临沧677000

出　　处：《南方电网技术》2022年第1期90-98,共9页Southern Power System Technology

基　　金：国家自然科学基金项目(52007029);中国南方电网有限责任公司科技项目(YNKJXM20170763)。

摘　　要：一起金属氧化物避雷器故障分析中发现,对阀片存在缺陷的避雷器进行局部放电测试时未检出局部放电特征信号。对该现象进行深入分析,采用COMSOL Multiphysics®多物理场仿真软件建立金属氧化物避雷器模型,研究阀片柱中不同位置阀片存在缺陷时,以及不同缺陷类型时避雷器阀片表面的电场分布规律,通过对比存在缺陷时和无缺陷时的金属氧化物避雷器阀片柱的表面电场分布,研究局部放电测试对金属氧化物避雷器阀片缺陷的敏感程度,并针对仿真研究内容搭建试验进行验证,验证试验的结果与仿真得到的结论一致。研究发现:局部放电测试对金属氧化物避雷器两端的阀片缺陷较为敏感,对金属氧化物避雷器中间部位的阀片缺陷敏感度较低。研究结果为金属氧化物避雷器的局部放电现场测试提供技术参考。It is discovered in an analysis of a metal oxide arrester(MOA)fault that the partial discharge characteristic signal is not detected when testing the arrester with defective valve plate.To deeply analyze this phenomenon,the model of MOA is established by using COMSOL multiphysics®simulation software.The electric field distribution law of MOA valve sheet surface is studied when there are defects at different positions and different types of defects.The surface electric field distributions of MOA valve sheet column with and without defects is compared,The sensitivity of partial discharge test to MOA valve defects is studied,and the simulation test is built to verify the results.The results of verification test are consistent with the simulation results.It is found that the partial discharge test is more sensitive to the defects of the MOA at both ends,and less sensitive to the defects of the MOA in the middle.The research results provide technical reference for the partial discharge field test of MOA.

关 键 词：金属氧化物避雷器 局部放电 COMSOL 电场分布 

分 类 号：TM721[电气工程—电力系统及自动化]