一种零磁通双级电流互感器的暂态响应分析  

Analysis of a zero-flux bipolar CT's response to transient current

作　　者：邓习稳[1] 任士焱[1] 

机构地区：[1]华中科技大学电气与电子工程学院,武汉430074

出　　处：《仪器仪表学报》2006年第z2期1172-1173,共2页Chinese Journal of Scientific Instrument

摘　　要：本文介绍了一种零磁通双级电流互感器的结构、工作原理与测量暂态电流的响应特性,给出了零磁通双级电流互感器的电路原理图和等效电路图,推导了它的暂态响应。结果证明,其直流分量的二次时间常数比普通互感器及双级互感器大得多。说明了这种零磁通双级电流互感器的误差比普通和双级电流互感器的误差更小、线性度更好、测量范围更宽,而且有更强的带负载能力。This paper introduces the structure of a bipolar CT with zero flux as well as its operational principle and response of transient current measurement. Its principle chart and equivalent circuit are provided. By inferring the response of transient current, the result proves that its secondary time qpnstant is much larger than normal and bipolar CT. It illuminates that this kind of bipolar CT can make less current error, better linearity and wider bound for measurement. Furthermore, it permits meeting larger load.

关 键 词：双级电流互感器 零磁通 励磁电流 

分 类 号：TH7-55[机械工程—仪器科学与技术]