污秽绝缘子泄漏电流在线监测及数据分析  

Online Monitoring and Data Analysis on Leakage Current of Insulators

作　　者：何慧雯[1] 戴敏[1] 张亚萍[1] 王恒[2] 安光辉[2] 

机构地区：[1]国网电力科学研究院,武汉430074 [2]唐山供电公司,唐山063000

出　　处：《高电压技术》2010年第12期3007-3014,共8页High Voltage Engineering

摘　　要：绝缘子污秽是发生污闪事故的主要原因之一,对泄漏电流进行在线监测是研究绝缘子耐污能力的一项重要手段。为获得大量的实际监测数据,对不同环境地区的泄漏电流进行了在线监测及分析。以不同地区不同环境条件下的绝缘子在线监测泄漏电流数据为例,进行数理统计和原理分析,指出沿海环境和工业水泥污染区绝缘子耐污性能与空气湿度和灰尘颗粒含量呈负相关。沿海地区在头年末至第2年上半年积污严重,其中2、3、4月份为最严重的时段,但每年随空气湿度变化不尽相同;而处于水泥污染地区的绝缘子,污秽最严重的时段是每年的6,7月份。通过对实测报警电流波形的分析,见证了绝缘子污闪的实际发展过程。结果表明,采用泄漏电流特征量来表示绝缘子污秽度的参数,不仅能较真实地反映绝缘子污秽实况,而且易实现在线检测与报警。该研究数据和结论为绝缘子耐污性能研究提供了丰富的数据和理论支持,为运行部门针对不同环境条件采取不同的抗污秽措施提供了参考和帮助。The contamination of insulator is one of the main causes of the pollution flashover accident.One important means to study the durability of insulator against pollution is to on-line monitor the leakage current so as to obtain a large number of actual monitoring data.Taking some insulator on-line monitoring leakage current data under different environmental conditions in different areas as examples,we analyzed the characteristics of insulators against pollution in coastal environment and in industrial cement polluted area.The characteristics of insulators against pollution and dust particles or air humidity are negatively correlated.Serious contamination on insulators always occurs in February,March and April in coastal environment,depending on the air humidity.The most serious contamination happens in June and July in industrial cement polluted area.The results show that leakage current can be used as a parameter to indicate the actual level of contamination,which is convenient for online monitoring and alarming.By analyzing the measured current alarm wave,the actual development process of insulator pollution flashover is presented,providing a reference to the durability of insulator against pollution study.

关 键 词：绝缘子污秽闪络 泄漏电流 监测 水泥污染区 憎水性 报警 

分 类 号：TM855[电气工程—高电压与绝缘技术]