基于谐波分析法对金属氧化物避雷器阻性泄漏电流测量的验证  

Study on Verification of Resistive Leakage Current Measurement of Metal Oxide Arrester Based on Harmonic Analysis Method

作　　者：张耀文 车传强 王磊 张一帆 ZHANG Yaowen;CHE Chuanqiang;WANG Lei;ZHANG Yifan(Inner Mongolia Electric Power Research Institute Branch of Inner Mongolia Power(Group)CO.,Ltd.,Hohhot,Inner Mongolia 010020,China;Inner Mongolia Power(Group)CO.,Ltd.,Hohhot,Inner Mongolia 010020,China)

机构地区：[1]内蒙古电力(集团)有限责任公司内蒙古电力科学研究院分公司,内蒙古呼和浩特010020 [2]内蒙古电力(集团)有限责任公司,内蒙古呼和浩特010020

出　　处：《山西电力》2023年第5期21-24,共4页Shanxi Electric Power

基　　金：青年科技人员支持计划项目(2021-QK-06)。

摘　　要：金属氧化物避雷器是电力系统中一种重要的过电压保护装置,其运行状态通常是通过带电检测其阻性泄漏电流来判断。然而,由于存在很多外界干扰因素,阻性泄漏电流很难被完全从全电流中干净地提取出来,它的大小很难被精确确定,测量结果通常需要反复验证。构建的220 kV金属氧化物避雷器的仿真模型,通过模拟电网电压为零时提取的阻性泄漏电流,采用谐波分析法对其进行分析,证明了该方法能有效减小电力系统谐波电压和相间耦合电容的扰动,准确提取出阻性泄漏电流,很好地佐证了现场测试结果的准确性。Metal oxide arrester is an important overvoltage protection device in power system,so its operating status is usually judged by live detection of its resistive leakage current.However,due to many external interference factors,it is difficult to extract the resistive leakage current completely from the full current.Its value is difficult to be measured accurately,and the measurement results usually need to be verified repeatedly.Therefore,a simulation model of the 220 kV metal oxide arrester is constructed in this paper,by simulating the resistive leakage current extracted when the grid voltage is zero.The harmonic method is used for analysis,and the results prove that this method can effectively reduce the disturbance caused by harmonic voltage and phase-to-phase coupling capacitance in the power system.Thus,the resistive leakage current is accurately extracted,which could effectively prove the accuracy of the field test results.

关 键 词：金属氧化物避雷器 过电压保护装置 阻性漏泄电流 谐波分析法 

分 类 号：TM862[电气工程—高电压与绝缘技术]