摘要
基于现有磁调制式电流互感器,以倍频磁调制器为核心且通常具有双磁芯结构复杂信号电路以及检测误差大等缺点,文中提出了一种单磁芯结构的相位差磁调制式直流互感器。首先,给出这种磁调制式直流漏电流互感器的电路图。其次,详细分析其工作原理和设计思路。最后验证,文中设计的磁调制式直流漏电流互感器的测量误差较小,能够满足直流系统接地故障巡回监测的要求。
Based on the disadvantages of magnetic modulation type current transformer which has the frequency magnetic modulator and complex structure signal circuits with dual core detection and has big detection errors. This paper proposes a single core structure of the magnetic phase modulation DC Transformer. Firstly,it gives out the magnetic DC leakage current transformer circuit. Besides, it analyzes the working principle and design ideas in detail. Lastly, the experimental verification is that the magnetic modulation DC leakage current transformer measurement error is small and it is able to meet the monitoring requirement of the DC system ground fault circuit.
出处
《信息技术》
2014年第3期131-133,136,共4页
Information Technology
关键词
磁调制式
互感器
直流漏电流
方波激磁
激磁绕组
magnetic modulation
transformer
DC leakage current
square wave excitation
excitation windings
