邻相电流对TMR传感器阵列测量精度的影响研究
Research on Influence of Adjacent Phase Currents on Measurement Accuracy of TMR Sensor Arrays
牛晓晨 1黄杰 1肖春 2杨晓霞 2何镇 3王陈博3
作者信息
- 1. 国网智能电网研究院有限公司国家电网公司电力智能传感技术实验室,北京 102209
- 2. 国网山西省电力公司营销服务中心,山西太原 030032
- 3. 华北电力大学电气与电子工程学院,北京 102206
- 折叠
摘要
为了计算邻相电流对电流传感器精度的影响程度,基于隧道磁阻(Tunnel Magnetoresistance,TMR)元件测量电流的原理,提出了一种用于表示三相交流系统中由邻相电流引起的被测导体传感器阵列测量误差的解析表达式.然后,以幅值为6 000 A的三相电流为例,通过解析式法和磁场有限元仿真计算,分析了不同因素对被测导体电流传感器测量精度的影响程度.结果表明,所提出的解析表达式能够较为准确地计算邻相电流引起的测量误差;交流大电流场景下,TMR阵列至少需要10 个传感器对测量电流值进行相互修正,研究成果为交流系统中三相导体的电流传感器阵列的设计和应用提供了理论基础.
Abstract
In order to calculate the influence of adjacent phase currents on the accuracy of current sensors,based on the principle of current measurement by tunnel magnetoresistance(TMR)elements,an analytical ex-pression for the test conductors sensor arrays measurement error caused by adjacent phase currents in a three-phase alternating current system is proposed.Then,in the case of a three-phase current with an amplitude of 6 000 A,the influence of different factors on the measurement accuracy of the current sensors of the conductors to be tested is analyzed by analytical method and magnetic field finite element simulation.The results show that the proposed analytical expression can calculate the measurement error caused by adjacent phase currents more accurately.With the alternating current high-current scenarios,the TMR arrays are designed to mutually correct the measured current with at least 10 sensors,and the research provides theorical basis for the design and ap-plication of current sensor arrays for three-phase conductors in alternating current systems.
关键词
隧道磁阻/电流传感器/邻相干扰/圆形阵列/邻相误差分析Key words
TMR/current sensor/adjacent phase interference/circular arrays/analysis of adjacent phase error引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据