泄漏电流监测在特高压直流绝缘子选型中的应用  

Application of Leakage Current Online Monitoring System to UHVDC Insulator Selection

作　　者：梅红伟[1] 毛颖科 王黎明[1] 关志成[1] 

机构地区：[1]清华大学深圳研究生院,深圳518055 [2]上海超高压输变电公司,上海200063

出　　处：《高电压技术》2010年第10期2374-2379,共6页High Voltage Engineering

基　　金：国家重点基础研究发展计划(973计划)(2009CB724503)~~

摘　　要：为了提高自然积污试验在特高压直流绝缘子选型中的正确性和可靠性,提出了在试验绝缘子上安装泄漏电流在线监测系统,并以测量与计算得到的绝缘子泄漏电流某些特征参量作为绝缘子选型的重要依据,并据此给出绝缘子选型的结果。以云广直流自然积污试验站2005-05至2007-09进行的直流绝缘子自然积污选型试验为研究对象,分析了积污期间各个绝缘子泄漏电流的特点,统计了绝缘子泄漏电流的某些特征量,提出了利用这些特征量加权评分的结果作为绝缘子选型的重要依据,并给出了利用该方法进行绝缘子选型的结果。对该方法所得选型结果与先前人工污秽试验所得选型结果进行比较后证明:两者结论完全一致,有效验证了所提泄漏电流特征量加权评分方法是可行和有效的。In order to improve the accuracy and reliability of natural pollution test used in ultra high voltage direct current（UHVDC）insulator selection,a novel method that the leakage current online monitoring system were installed on the tested insulator strings was put forward by Tsinghua University,and the characteristic quantities of leakage currents monitored and calculated by the system were used as an important basis for UHVDC insulator selection.The results of UHVDC insulator selection based on this method were also given.Taking the insulators used in the natural pollution test in the Yun-Guang UHVDC Pollution test station as the objects of study,this pollution test began in May 2005and ended in September 2007,the tested insulator leakage current characteristics in this period were recorded and analyzed in detail.The weighted scores of leakage current characteristic quantities were calculated and used as an important basis for the selection of insulators,and the selection results based on the scores were given.The selection results by this method were compared with those by the artificial pollution tests,the comparison was more consistent.It is demonstrated that using the characteristic quantities of leakage currents monitored in the whole process to help the selection of insulators in the natural pollution test is feasible and effective.

关 键 词：泄漏电流 在线监测 特征量 直流 绝缘子选型 自然积污站 

分 类 号：TM216[一般工业技术—材料科学与工程] TM855[电气工程—电工理论与新技术]