一种提高光学电流互感器抗相间磁干扰能力的新方法  

A New Method to Improve Optical Current Transducer′s Capability Against Interphase Magnetic Interference

作　　者：贺鸿鹏[1] 刘君[1] 蔡博[1] 

机构地区：[1]华北电力大学新能源电力系统国家重点实验室,北京102206

出　　处：《电测与仪表》2014年第2期6-9,18,共5页Electrical Measurement & Instrumentation

基　　金：国家自然科学基金资助项目(51277066)

摘　　要：随着智能电网对量测设备要求的提高,光学电流互感器在电力系统中具有越来越广阔的应用前景。针对传统闭合光路结构存在的缺陷,研究了螺线管聚磁光路结构并分析了其管内外磁场。为解决传统的三相螺线管聚磁式传感头平行布置时存在的相间磁干扰严重的问题,提出了相间磁场正交技术。在COMSOL(试用版)中进行的有限元仿真分析和现场运行结果表明:运用相间磁场正交技术的的螺线管聚磁式光学电流互感器具有很高的抗相间磁干扰能力,达到了0.2级的测量水平。As smart grid makes higher requirement for measurement equipment, optical current transducer （OCT） used in power system shows broader application prospects. Considering the shortcoming of traditional closed light path structure, we studies the optical structure of solenoid collecting magnetism and analyzes and its magnetic field. To solve the problem of serious interphase magnetic disturbance caused by parallel arrangement of three-phase sensor heads, the interphase magnetism orthogonal technology is proposed. Finite element analysis with COMSOL and field operation results reveal that OCT using interphase magnetism orthogonal technology has strong capability against interphase magnetic interference with a precision of up to 0.02%.

关 键 词：光学电流互感器 抗相间磁干扰能力 螺线管聚磁光路结构 COMSOL 相间磁场正交技术 

分 类 号：TM933[电气工程—电力电子与电力传动]