数字化变电站电流互感器二次回路的监视  

Monitoring of Secondary Circuit of Current Transformer in Digital Substation

作　　者：何小涛[1] 谢海远 邓祥力[2] 

机构地区：[1]国网四川省电力公司成都供电公司,四川成都610000 [2]上海电力学院电气工程学院,上海200090

出　　处：《上海电力学院学报》2014年第6期540-544,共5页Journal of Shanghai University of Electric Power

摘　　要：从数字化变电站出发,探讨了电流互感器二次回路断线、CT饱和、剩磁计算、二次电缆磨损等问题,提出了变压器区外故障CT饱和判据,采用相量法来判别二次电缆是否发生磨损,建立了剩磁计算的数学模型,并给出了算法.结合以上原理设计了二次回路监视装置,介绍了该装置的功能和现场应用情况.On the basis of digital substations,the problems of the current transformer secondary circuit break,the CT saturation,calculation of residual flux,the wear of secondary cable etc. are discussed. The CT saturation criterion of outside area transformer fault is proposed. The wear of secondary cables is determined by using the vector method. A mathematical model is established to calculate the residual magnetism,and algorithm is given. Combined with the principle mentioned above,a monitoring device for secondary circuit is developed,and the function and field application of the device are introduced.

关 键 词：电流互感器 数字化变电站 二次回路 监视 

分 类 号：TM452[电气工程—电器]