基于TMR传感器阵列与数值积分的电流测量技术研究  

Research on current measurement technology based onTMR sensor array and numerical integration

作　　者：范伟欣 李开成 陈浩 肖贤贵 陈西亚 FAN Weixin;LI Kaicheng;CHEN Hao;XIAO Xiangui;CHEN Xiya(State Key Laboratory of Advanced Electromagnetic Engineering and Technology,School of Electrical and Electronic Engineering,Huazhong University of Science and Technology,Wuhan 430074,China;Wuhan National High Magnetic Field Center,Huazhong University of Science and Technology,Wuhan 430074,China)

机构地区：[1]华中科技大学电气与电子工程学院强电磁工程与新技术国家重点实验室,武汉430074 [2]华中科技大学国家脉冲强磁场科学中心,武汉430074

出　　处：《电测与仪表》2024年第5期204-211,共8页Electrical Measurement & Instrumentation

基　　金：国家自然科学基金资助项目(52077089)。

摘　　要：为满足智能电网对先进传感技术和复杂电磁环境下高精度电流测量的需求,提出一种基于TMR传感器阵列和Newton-Cotes数值求积算法的电流测量方法。通过建立复杂干扰磁场环境的仿真模型,验证了不同状况下求积算法的准确性;设计了电流传感器的系统结构和硬件电路;制作了测量装置样机,搭建了实验平台,并进行了性能测试。结果表明,文中提出的方案具有较高的测量精度和抗外磁场干扰能力,在无聚磁环的情况下,0~16 A电流测量范围内最大相对误差分别为直流0.31%和工频交流1.00%,在电流导线位置和传感器姿态发生变化时仍能保持较高精度。In order to meet the requirements of smart grid for advanced sensing technology and high-precision current measurement in complex electromagnetic environment,we propose a current measurement method based on TMR sensor array and Newton Cotes numerical quadrature algorithm.By building the simulation model of complex interference magnetic field environment,the accuracy of the integration method under different conditions is verified.The system structure and hardware circuit of the current sensor are designed.The measurement device prototype is made,and the experimental platform is built for performance test.The results show that the proposed scheme has high measurement accuracy and anti-interference ability of external magnetic field,the maximum relative errors are DC 0.31%and power frequency AC 1.00%respectively in the range of 0~16A current measurement without magnetic focusing ring,and the high accuracy can be maintained when the current wire position and sensor posture change.

关 键 词：电流测量 隧道磁阻效应 传感器阵列 数值积分 

分 类 号：TM930[电气工程—电力电子与电力传动]