金属氧化物避雷器带电测试诊断技术探讨  

Discussion of Diagnosis Technology of On-Site Live Testing of MOA

作　　者：罗赞琛[1] 

机构地区：[1]中国南方电网超高压输电公司南宁局,南宁530021

出　　处：《电瓷避雷器》2014年第5期55-59,65,共6页Insulators and Surge Arresters

摘　　要：分析了金属氧化物避雷器(MOA)在运行电压下的电流特性,介绍了典型阻性电流测试技术并分析了现场测试MOA受到干扰的问题,重点分析了临相间容性耦合干扰。提出了通过MOA阻性电流基波的电流-电压相角的变化量来推算阻性电流基波分量的增长量的方法。最后总结出将阻性电流基波分量作为主要分析指标,同时结合阻性电流三次谐波分量的对MOA的性能进行综合分析、判断的诊断技术。In this paper, the leakage current characteristics of Metal Oxide Surge Arrester （MOA） under continuous operating voltage are analyzed. The typical leakage current testing technology is introduced and the interference problem of MOA＇s On-site testing is also analyzed especially the capacitive coupling interference between phases. It proposes the method of inferring the increment of the resistive component of fundamental current through the variation of the phase angle between voltage and current. It finally summarizes the testing technology which views the resistive component of fundamental current as the main analysis index and makes general analysis and judgment of the performance of MOA combining the third harmonic component of the resistive current.

关 键 词：金属氧化物避雷器 阻性电流 基波 三次谐波 电流-电压相角 

分 类 号：TM862[电气工程—高电压与绝缘技术]