多柱并联避雷器直流参数测量方法  

Measurement method of DC parameters-of multi-column parallel lightning arrester

作　　者：贾晓瑜 李连众 刘晓飞 JIA Xiaoyu;LI Lianzhong;LIU Xiaofei(EHV Branch Company of State Grid Hebei Electric Power Co.,Ltd.,Shijiazhuang Hebei 050070,China)

机构地区：[1]国网河北省电力有限公司超高压分公司,河北石家庄050070

出　　处：《宁夏电力》2023年第S01期34-37,共4页Ningxia Electric Power

基　　金：国网河北省电力有限公司科技项目(kj2022-036)。

摘　　要：针对多柱并联避雷器测量1 mA直流参考电压U_(1 mA)及0.75倍U_(1 mA)下的泄漏电流所需试验仪器容量大以及测量过程中避雷器高压端法兰间存在幅值不确定的悬浮电位问题,开展多柱并联避雷器不拆除避雷器本体试验方法研究。提出通过电阻分压法降低避雷器高压端法兰之间的压差和直流高压发生器的输出容量。通过试验从避雷器高压端法兰电位差、所需试验电流和测量准确性等三方面论证了电阻分压法测量多柱并联避雷器直流参数的可行性,为多柱并联避雷器例行试验提供了理论支撑。Aiming at the problem that the multi-column parallel arrester requires a large capacity of the test instrument to measure the leakage current under 1 mA DC reference voltage U 1 mA and 0.75 times U 1 mA,and there was an uncertain floating potential between the high-voltage flanges of the arrester during the measurement process,the test method of multi-column parallel arrester without removing the arrester body was carried out.The resistance divider method was proposed to reduce the differential pressure between the high-voltage flanges of the arrester and the output capacity of the DC high-voltage generator.The feasibility of measuring the DC parameters of multi-column parallel arresters by resistance divider method was demonstrated from three aspects:the potential difference of the high-voltage end flange of the arrester,the required test current and the measurement accuracy,which provide theoretical support and measurement guidance for the routine test of multi-column parallel arrester.

关 键 词：氧化锌避雷器 绝缘电阻 高压引线 

分 类 号：TM862[电气工程—高电压与绝缘技术]