电流互感器伏安特性试验分析与应用  

Test Analysis and Application of Current Transformer Volt-Ampere Characteristics

作　　者：耿恒业 张晶[1] 刘承志 GENG Hengye;ZHANG Jing;LIU Chengzhi(China Offshore Oil Engineering Co.,Ltd.,Tianjin 300452,China)

机构地区：[1]海洋石油工程股份有限公司,天津300452

出　　处：《通信电源技术》2020年第19期155-157,共3页Telecom Power Technology

摘　　要：电流互感器可以将电气线路上的大电流变换成小电流,将强电流信号转换成二次使用的弱电流信号,承担着高、低压系统之间隔离和高压量向低压量转换的职能。它在系统的保护、测量以及计量等设备的正常工作中都扮演着极其重要的角色,其运行状况的好坏直接关系到电力系统中电力计量的准确性和各类保护动作的正确性与可靠性。伏安特性试验通过检测电流互感器二次侧电压和励磁电流的对应关系,能及时检测出电流互感器有无铁芯损坏和二次线圈匝间短路等异常状况,对于确保电流互感器的可靠运行有着重要的意义。基于此分析了电流互感器伏安特性试验的原理、方法以及注意事项,对电流互感器在刚安装和定期维保时的伏安特性校验有一定的指导作用。By converting the large current on the electrical circuit into the small current and the strong current signal into the secondary weak current signal,the current transformer is responsible for the isolation between the high and low voltage systems in the power system and the conversion from high voltage to low voltage.It plays an extremely important role in the normal operation of the system protection,measurement,metering and others equipments,and its operation condition is directly related to the accuracy of power measurement and the correctness and reliability of all kinds of protection actions in the power system.The volt-ampere characteristic test can detect the abnormal condition of current transformer such as iron core damage and secondary coil interturn short circuit by detecting the corresponding relation between secondary voltage and excitation current of current transformer,which is of great significance to ensure the correct and reliable operation of current transformer.In this paper,the principle,method and attention of the current transformer volt-ampere characteristic test are analyzed and explained,which has certain guiding function for the current transformer volt-ampere characteristic check when it is installed or maintained regularly.

关 键 词：弱电流 电流互感器 伏安特性 励磁电流 匝间短路 

分 类 号：TM4[电气工程—电器]