计量用电流互感器二次回路状态监测终端及应用

摘要

Based on the equivalent circuit of the current transformer under different conditions,this paper puts forward a method for identifying state of the current transformer used for measurement to realize the accurate identification of different load current under the normal connection,open circuit and short-circuit.On this basis,the monitoring terminal of the secondary circuit of the current transformer is developed and then the trial operation is carried out in the real power grid.In addition,the function and performance of the terminal are analyzed with an actual case.%基于电流互感器不同状态下的回路等效电路,提出了电流互感器二次回路状态诊断方法,实现了对不同负荷电流下正常连接、开路和短路状态的准确识别.基于此开发了电流互感器二次回路监测终端,并进行了挂网试运行,同时结合案例对监测终端的功能与性能进行了分析.