基于隧穿磁阻效应的多点电晕放电磁场传感及定位  

Measurement and Location of Multiple Corona Discharges Based on Tunneling Magnetoresistive Sensors

作　　者：胡军[1] 赵根 常文治 毕建刚 王善祥 何金良[1] HU Junl, ZHAO Gen1, CHANG Wenzhi2, BI Jiangang2, WANG Shanxiang1,3, HE Jinliang1(1. State Key Laboratory of Control and Simulation of Power System and Generation Equipments, Department of Electrical Engi- neering, Tsinghua University, Beijing 100084, China; 2. China Electric Power Research Institute, Beijing 100192, China; 3. Stanford University Center for Magnetic Nanotechnology, California 94305, US)

机构地区：[1]清华大学电机工程与应用电子技术系电力系统及发电设备控制和仿真国家重点实验室,北京100084 [2]中国电力科学研究院有限公司,北京100192 [3]斯坦福大学磁纳米技术中心,美国加利福尼亚州94305

出　　处：《高电压技术》2018年第3期1003-1008,共6页High Voltage Engineering

基　　金：国家重点基础研究发展计划(973计划)(2013CB228206);国家自然科学基金(51429701);国家电网公司科技项目(EPRI 5342GY140023)~~

摘　　要：电晕放电的检测及定位对于电网设备的稳定运行至关重要。为此针对多个点对板形式的电晕放电进行了磁场传感测量及定位研究,基于隧穿磁阻传感器设计并制作了双轴磁场传感测量装置,通过传感测量装置对电晕放电脉冲电流产生磁场的响应,实现对电晕电流及其磁场的测量。应用电晕电流的定位算法,得到多个点对板的电晕放电点位置,定位计算误差稳定在10%左右,表明了测量方法及定位算法的可行性。该测量方法及算法考虑了电晕电流的特点,合理利用了隧穿磁阻传感器的测量优势,为电气设备的电晕放电检测提供了新的思路及可靠手段。The detection and location of corona discharge are essential for the stability and reliability of electrical equipment in power grid. We proposed a novel method for measurement and location of multiple discharge points based on tunneling magnetoresistive sensors. A dual-axial tunneling magnetoresistive sensor device was designed and prepared to measure the magnetic field vector. The corona discharge current and magnetic field in free space were achieved by sensors＇ responses to the external discharge magnetic field. The locations of multiple corona discharge points were calculated based on the location algorithm. The results indicated a relative error was approximately 10%, which was reasonable for the practical application. The measurement device and location algorithm fully utilizes the sensors＇ merits and provides a promising solution for multiple corona discharge location.

关 键 词：电晕放电 空间磁场 隧穿磁阻传感器 放电定位 电气设备稳定性 

分 类 号：TM936.1[电气工程—电力电子与电力传动]