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
鲍爱达 1陈梦旎 1李学超1
作者信息
- 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;中北大学仪器科学与动态测试教育部重点实验室 太原 030051
- 折叠
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.
Abstract
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Key words
Rogowski coil/current measurement/flexibility/compound integration circuit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