高频磁电耦合电流传感器调理电路设计与实现  

Design and Implementation of Conditioning Circuit for High-frequency Magnetoelectric Coupling Current Sensor

作　　者：刘苏婕 莫锦涛 吴金根 李福超 LIU Sujie;MO Jintao;WU Jingen;LI Fuchao(State Grid Sichuan Electric Power Company Marketing Service Center,Chengdu 610045,Sichuan,China;Electronic Materials Research Laboratory,Key Laboratory of the Ministry of Education,School of Electronic Science and Engineering,Xi′an Jiaotong University,Xi′an 710049,Shaanxi,China)

机构地区：[1]国网四川省电力公司营销服务中心,四川成都610045 [2]西安交通大学电子科学与工程学院电子陶瓷与器件教育部重点实验室,陕西西安710049

出　　处：《四川电力技术》2025年第1期93-98,104,共7页Sichuan Electric Power Technology

基　　金：国网四川省电力公司科技项目“基于磁电耦合效应的新型高灵敏无源交直流电流传感技术研究”(5219722000V)。

摘　　要：针对新型电力系统中兆赫兹级高频暂态电流分量的探测需求,介绍了一款剪切模式高频磁电耦合电流传感器的敏感机理和结构设计。为有效提升该电流传感器的灵敏度、探测极限等核心性能,设计并研制了一款高频调理电路,通过仿真分析对其性能做出判断,进一步搭建了一套高频电流试验系统对其进行了试验验证。试验结果表明,经过调理后的灵敏度达到14.24 mV/mA,线性拟合度(R平方)达到0.99968,0.9~1.1 MHz频率范围内输出信号有效值的变化波动小于3%,探测极限达到10μA以内。该调理电路显著提升了磁电耦合电流传感器的高频探测性能,对于新型电力系统中高达MHz频率的高频暂态电流分量探测具有很好的应用潜力。The sensing mechanism and structure design of a d15 mode high-frequency magnetoelectric coupling current sensor is introduced for detection needs of high-frequency transient current component up to MHz level in new power system.In order to effectively improve sensitivity,detection limit and other core performances of current sensor,a high-frequency conditioning circuit is designed and developed,and its performances are estimated by simulation.Furthermore,a high-frequency current test system is established to verify its performances.The experimental result shows that the sensitivity under conditioning reaches 14.24 mV/mA,the linear regression coefficient reaches 0.99968,the fluctuation of output signal RMS is less than 3%within the frequency range of 0.9 MHz to 1.1 MHz,and the detection limit is within 10μA.This conditioning circuit significantly improves the high-frequency detection performance of magnetoelectric coupling current sensor,which has great potential for high-frequency transient current component detection up to MHz frequency in new power system.

关 键 词：磁电耦合 电流传感器 高频电流 调理电路 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]