电流互感器二次回路常见问题分析  

Analysis of Common Problems for Current Transformer Secondary Circuit

作　　者：杨奇 魏栋 YANG Qi;WEI Dong(Shanxi Luguang Electric Power Co.,Ltd.,Changzhi 046600,China)

机构地区：[1]山西潞光发电有限公司,山西长治046600

出　　处：《湖南电力》2023年第2期117-120,共4页Hunan Electric Power

摘　　要：针对电流互感器二次回路相电流或中性线电流开路、不同工作状况下回路两点接地等问题,对比分析在励磁涌流、区外故障等异常运行工况下不同绕组二次电流、自产零序电流与外接零序电流幅值、相位,将二次电流正确接入故障录波器,及完善检修工作措施票等方法。同时针对多抽头互感器的磁路特性进行分析,得出备用二次抽头不需要短接的结论。以上方法确保互感器二次回路的完整性,有效提高了二次回路运行可靠性。Aiming at the problems of open circuit of phase current or neutral line current in secondary circuit of current transformer and two-point grounding of circuit under different working conditions,the method are put forward that under abnormal operating conditions such as inrush current and out-of-area fault,the amplitude and phase of the secondary current of different windings,the self-produced zero-sequence current and the external zero-sequence current are compared and analyzed,and the secondary current is correctly connected to the fault recorder,and consummates the inspection work measure ticket and so on.At the same time,the magnetic circuit characteristic of multi-tap transformer is analyzed,and the conclusion that secondary tap does not need short connection is obtained.The integrality of the secondary circuit of the transformer is ensured by the above methods,and the operation reliability of the secondary circuit is improved effectively.

关 键 词：电流互感器 二次回路 开路 两点接地 备用抽头 

分 类 号：TM452[电气工程—电器]