光学电流传感的旋光曲线分析  

Analysis of Faraday Optical Rotation Curve Based on Optical Current Sensing Technology

作　　者：刘士齐 王佳颖[2] 朱启贵[2] 张国庆[3] 郭志忠[3] 

机构地区：[1]武汉大学,武汉430072 [2]国网吉林省电力有限公司电力科学研究院,长春130021 [3]哈尔滨工业大学,哈尔滨150001

出　　处：《吉林电力》2016年第2期21-25,共5页Jilin Electric Power

摘　　要：针对光学电流传感器中最简洁的传感结构——块玻璃直通光路式传感结构,研究了传感长度与传感特性的关系,通过分析分布在磁光材料各位置上的磁场强度,得到了反映法拉第旋光角与磁光材料长度关系的法拉第磁旋光曲线。当导体位于磁光材料的对称轴上时,旋光角存在一定程度的饱和,该饱和点即为法拉第磁旋光曲线的膝点,工作在膝点附近的材料长度利用率最高,提出了膝点的简捷算法,能快速确定曲线上的膝点位置。研究表明,膝点与磁光材料的安装位置、通电导体的形状等因素相关,选取距离导线最近位置安装为宜。According to the most concise sensing structure in optical current sensor,apiece of glass straight optical path type sensing structure,studied the relationship between sensing length and sensing performance.Through the analysis of the magnetic field strength distribution in each position on the magneto-optical materials,obtained the Faraday optical rotation curve which reflects the relationship between Faraday angle and magneto-optical material length.The angle of rotation has a certain degree of saturation,when the conductor is positioned on the axis of symmetry on the magneto-optical materials;the saturation point is Faraday magnetic rotation curve of the knee point.The magneto-optical material length on knee point has a highest utilization ratio,and the paper has put forward a simple algorithm of knee point,which could fix the knee point on curve fleetly.According to the research,knee point position is related with glasses location and sectional shape of conductor.So the best location is the place nearest to conductor.

关 键 词：光学电流互感器 法拉第旋光曲线 膝点 微小化 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置] TM63[自动化与计算机技术—控制科学与工程]