交流采样回路故障分析及识别方法  

Fault Analysis and Recognition Scheme Relevant to AC Sampling Circuits

作　　者：樊刚 宋子杰 FAN Gang;SONG Zijie(Yan'an Power Supply Company,Yan'an 716000)

机构地区：[1]国网陕西省电力有限公司延安供电公司,陕西延安716000

出　　处：《电力安全技术》2024年第7期51-53,57,共4页Electric Safety Technology

摘　　要：通过交流采样回路常见的故障录波,分析了CT二次N回路两点接地、饱和、寄生和PT二次N回路两点接地、断线以及二、三次回路混用的波形特征,介绍了二次回路断线判据,归纳出交流采样回路常见故障的识别方法,以期为现场运行维护提供借鉴。Based on the common fault records of AC sampling circuits,analyses are conducted on the waveform characteristics in case of two-point grounding,saturation and parasitism of the secondary loop N in CT,the two-point grounding and breakage of the secondary loop N in PT,and the mixed use of secondary and tertiary loops.The criteria of the secondary line breakage are specified and the methods for recognition of common faults relevant to AC sampling circuits are summed up so as to guide on-site operation and maintenance.

关 键 词：交流采样 二次回路故障 CT故障 PT故障 

分 类 号：TM7555[电气工程—电力系统及自动化]