GIS绝缘子金属污秽缺陷不同程度间歇性放电诊断分析研究  

Diagnosis and Analysis of Different Degrees of Intermittent Discharge for Metal Contamination Defect in GIS Insulator

作　　者：黄立才 杨旭[1,2] 张静 罗传仙[1,2] 陈佳 张国治[1,2,3] HUANG Licai;YANG Xu;ZHANG Jing;LUO Chuanxian;CHEN Jia;ZHANG Guozhi(Wuhan Nari Limited Liability Company of State Grid Electric Power Research Institute,Wuhan 430074,Hubei,China;Nari Group(State Grid Electric Power Research Institute)Co.,Ltd.,Nanjing 211006,Jiangsu,China;School of Electrical and Electronic Engineering,Hubei University of Technology,Wuhan 430068,Hubei,China)

机构地区：[1]国网电力科学研究院武汉南瑞有限责任公司,湖北武汉430074 [2]南瑞集团(国网电力科学研究院)有限公司,江苏南京211006 [3]湖北工业大学电气与电子工程学院,湖北武汉430068

出　　处：《电气传动》2024年第2期88-96,共9页Electric Drive

基　　金：国家电网有限公司总部管理科技项目(524625200028)。

摘　　要：针对现场气体绝缘组合电器(GIS)绝缘缺陷局部放电漏报、误报情况频发的问题,利用真型GIS搭建局放多源检测试验平台,开展绝缘子表面金属污秽缺陷间歇性放电试验,采用不同局放检测法研究不同程度间歇性放电特性变化规律。研究结果表明:金属污秽缺陷放电量随着放电时间的延长呈现先升后降的变化趋势;放电时间间隔整体呈现增加的变化趋势;超声检测法和化学检测法无法实现金属污秽间歇性放电的有效感知;由4组50个工频周期特高频(UHF)相位分辨局部放电(PRPD)图谱数据所构成的200个工频周期UHF PRPD图谱中能初步得出间歇性放电分布规律;处于间歇性放电状态的金属污秽缺陷不会逐渐发展演变成击穿放电故障。研究成果对拓展间歇性放电特征的认知及现场对GIS放电缺陷的检测具有重要意义。In view of the frequent occurrence of omissions and false alarms of partial discharge insulation defects in on-site gas insulated switchgear(GIS),the partial discharge multi-source detection test platform was built by using true GIS to carry out the intermittent discharge test of metal contamination defect on the surface of insulator.Different partial discharge detection methods were used to study the variation of intermittent discharge characteristics of different discharge degrees.The research results show that the discharge amount of metal contamination defect shows a trend of first increasing and then decreases with the prolongation of discharge time;the overall discharge time interval shows an increasing trend;ultrasonic detection method and chemical detection method cannot realize the effective perception of intermittent discharge of metal contamination defect;the distribution law of intermittent discharge can be preliminarily obtained from the 200 frequency period ultra high frequency(UHF)phase-resolved partial discharge(PRPD)spectrum composed of 4 groups of 50 frequency period UHF PRPD spectrum data;metal contamination defect in intermittent discharge state will not gradually evolve into breakdown discharge failures.The research results are of great significance for expanding the cognition of intermittent discharge characteristics and the field detection of GIS discharge defects.

关 键 词：气体绝缘组合电器 金属污秽 间歇性 局部放电 多源特征 

分 类 号：TM85[电气工程—高电压与绝缘技术]