用于小电流测量的柔性罗氏线圈设计  

Design of Flexible Rogowski Coil for Small Current Measurement

作　　者：鲍爱达[1,2] 陈梦旎 李学超 BAO Aida;CHEN Mengni;LI Xuechao(State Key Laboratory of Dynamic Measurement Technology,North University of China,Taiyuan 030051;Key Laboratory of Instrument Science&Dynamic Measurement(Ministry of Education),North University of China,Taiyuan 030051)

机构地区：[1]中北大学省部共建动态测试技术国家重点实验室,太原030051 [2]中北大学仪器科学与动态测试教育部重点实验室,太原030051

出　　处：《舰船电子工程》2024年第3期212-218,共7页Ship Electronic Engineering

基　　金：国家自然科学基金项目(编号:62204232)资助。

摘　　要：保障电力系统的安全运行对国家和人民至关重要。因此,须及时监测设备的性能与可靠性。其中,对设备电流的测量是相当必要的。基于罗氏线圈具有出色的线性度并且精度高,选择采用罗氏线圈作为电流传感器。但以往的线圈在测量小电流时,灵敏度低,精度低,适合对大电流的测量。针对以上问题,进行用于小电流测量的柔性线圈设计,相比刚性线圈,其轻便且安装快捷。该线圈使用硅橡胶电缆作为骨架,双层绕线增大线圈互感,有效提高了线圈的灵敏度。通过对工频电流的测量,最终灵敏度约为40mV/A,满足电力系统中的小电流测量要求,可应用于实际工程中。Ensuring the safe operation of the power system is crucial for the country and the people.Therefore,it is necessary to monitor the performance and reliability of the equipment in a timely manner.Among them,the measurement of equipment current is quite necessary.Based on the excellent linearity and high accuracy of the Roche coil,the Roche coil is chosen as the current sen-sor.However,in the past,coils had low sensitivity and accuracy when measuring small currents,making them suitable for measur-ing large currents.To address the above issues,a flexible coil design for small current measurement is proposed.Compared to rigid coils,it is lightweight and easy to install.The coil uses a silicone rubber cable as the skeleton,and the double-layer winding in-creases the mutual inductance of the coil,effectively improving the sensitivity of the coil.By measuring the power frequency cur-rent,the final sensitivity is about 40mV/A,which meets the requirements for small current measurement in power systems and can be applied in practical engineering.

关 键 词：罗氏线圈 电流测量 柔性 复合积分 

分 类 号：TM76[电气工程—电力系统及自动化]