反串式平面空心线圈电流传感器设计与性能分析  

Design of Overhead Line Electromagnetic Measurement Sensor Based on Reverse String Air-core Coil

作　　者：张旭东 袁兴宇 李响 ZHANG Xudong;YUAN Xingyu;LI Xiang(Electric Power Research Institute of Yunnan Power Grid Co.,Ltd.,Kunming 650032,China)

机构地区：[1]云南电网有限责任公司电力科学研究院,云南昆明650032

出　　处：《电工技术》2024年第1期136-141,共6页Electric Engineering

摘　　要：电网工作人员常带电设施作业,导致触电事故的现象时有发生,亟须合适的电场测量及安全预警装置。根据此类需求设计了一款基于空心线圈的新型传感器,为实际复杂工况下的电场测量提供新的解决方案。首先研究输电导线上的电流与其附近磁场强度的规律以及反向串联结构测量原理,结合合适的积分电路得到传感器在微分工作状态下的最优设计。然后根据电场测量反演规律,设计空心线圈型高频带电流传感器。最后通过分析空心线圈传感器的稳态和动态响应性能,验证了所设计的空心线圈传感器具有较宽的频带和测量范围,能有效抵御外界磁场干扰,且暂态与稳态响应性能满足实际需求。Power grid staffs often work in live facilities with electric shock accidents occurring frequently,and appropriate electric field measurement and safety warning devices are urgently needed.According to such requirements,a new sensor based on air-core coil is designed to provide a new solution for electric field measurement under actual complex working conditions.In this paper,the law of current on transmission wire and magnetic field intensity near it and the measurement principle of reverse series structure are first studied,and optimal design of the sensor under differential working state is obtained by combining the appropriate integration circuit.Then according to the inversion law of electric field measurement,an air-core coil type high-frequency current sensor is designed.Finally by analyzing steady-state and dynamic response performance of the air core coil sensor,it is successfully verified that the designed air-core coil sensor has a wide frequency band and a large measurement range,can effectively tolerate interference of external magnetic field,and achieve transient and steady-state response performance that satisfies actual needs.

关 键 词：空心线圈 非接触测量 频宽 电磁感应 

分 类 号：TM07[电气工程—电工理论与新技术]