外部因素引起的避雷器泄漏电流变化特性研究  

Variation Characteristics of Arrester Leakage Current Caused by External Factors

作　　者：崔江静 吴宏晓 彭姚红 南保峰 李莹 李洪杰[3] CUI Jiangjing;WU Hongxiao;PENG Yaohong;Nan Baofeng;LI Ying;LI Hongjie(Zhuhai Power Supply Bureau,Guangdong Power Grid Co.,Ltd.,Zhuhai 519000,China;Panzhihua Power Supply Bureau,Sichuan Power Grid Co.,Ltd.,Panzhihua 617000,China;School of Electrical Engineering,Xi'an Jiaotong University,Xi'an 710049,China)

机构地区：[1]广东电网有限责任公司珠海供电局,广东珠海519000 [2]国网攀枝花供电公司,四川攀枝花617000 [3]西安交通大学,西安710049

出　　处：《电瓷避雷器》2024年第4期55-63,共9页Insulators and Surge Arresters

基　　金：南方电网公司科技项目资助[编号:030400KK52190132(GDKJXM20199169)]。

摘　　要：无间隙金属氧化物避雷器(MOA)以其无与伦比的优异特性被广泛地用于限制各种过电压,保护电气设备、电缆护层等免遭损坏。为了保证MOA可靠运行,监测MOA的泄漏电流是判定MOA劣化状态的最重要手段。由于MOA泄漏电流变化特性受多种随机因素影响,尤其是外部因素也会导致MOA泄漏电流变化,使MOA劣化状态的判定依据和阈值至今无法定量确定,严重影响MOA状态判定的有效性和正确性。基于MOA状态参量测试平台,试验研究了外部因素对MOA泄漏电流变化的影响规律,获得了运行电压波动、环境温度和表面污秽等因素引起的MOA泄漏全电流、阻性泄漏电流等的变化特性。研究成果对泄漏电流测试方法和判定阈值有重要的参考价值。Gapless metal oxide arrester(MOA)is widely used to limit overvoltage and protect electrical equipment and cable sheath from damage due to its unparalleled excellent characteristics.In order to ensure the reliable operation of MOA,monitoring the leakage current of MOA is the most important means to determine the deterioration state of MOA.Because the change characteristics of MOA leakage current are affected by many random factors,especially external factors can also lead to the change of MOA leakage current,so that the basis and threshold of MOA deterioration state cannot be quantitatively determined,which seriously affects the effectiveness and correctness of MOA state determination.Based on the MOA state parameter test platform,the author experimentally studied the influence of external factors on the variation of MOA leakage current,and obtained the variation characteristics of MOA leakage total current and resistive leakage current caused by operating voltage fluctuation,ambient temperature and surface pollution.The research results provide important reference for leakage current test method and determination threshold.

关 键 词：MOA 外部因素 泄漏电流 变化特性 劣化判定 

分 类 号：TM862[电气工程—高电压与绝缘技术]