空气缝隙对抗直流分量电流互感器影响研究  

Research on influence of air gap on anti-DC component current transformer

作　　者：许飞宇 燕伯峰 刘宇鹏 黄欣 张能[3] 邓亮斌 XU Feiyu;YAN Bofeng;LIU Yupeng;HUANG Xin;ZHANG Neng;DENG Liangbin(Inner Mongolia Electric Power(Group)Co.,Ltd.,Huhhot 010020,China;School of Electrical and Information Engineering,Hunan University,Changsha 410082,China;Wuhan Nanrui Co.,Ltd.,State Grid Electric Power Research Institute,Wuhan 430074,China)

机构地区：[1]内蒙古电力(集团)有限责任公司,呼和浩特010020 [2]湖南大学电气与信息工程学院,长沙410082 [3]国网电力科学研究院武汉南瑞有限责任公司,武汉430074

出　　处：《电测与仪表》2024年第10期203-208,216,共7页Electrical Measurement & Instrumentation

基　　金：内蒙古电力公司2021年科技计划项目(2021-69)。

摘　　要：现代的电力系统中的交流电难以避免地会存在直流分量,直流分量导致交流电能计量误差,影响电能公平计量。抗直流分量电流互感器可在实现直流分量存在时的交流电流准确测量,但是其复合磁芯工作在大电流的情况下容易饱和。文中通过Ansys Maxwell对抗直流分量电流互感器的复合磁芯建模并引入空气缝隙,分析了对其工作的线性范围影响以及气隙的大小对抗直流分量电流互感器的影响。研究结果表明,空气缝隙有助于改善复合磁芯的线性工作范围,扩大正常工作时的线性电流范围,增强互感器的抗饱和能力。The AC current in the modern power system will inevitably have a DC component,which causes the AC energy metering error and affects the fair energy measurement.The anti-DC component current transformer can accurately measure the AC current when the DC component exists,but its composite magnetic core is easy to saturate under the condition of large current.This paper uses Ansys Maxwell to model the composite magnetic core of the DC component current transformer and introduces the air gap,and analyzes the influence of the linear range of its operation and the influence of the size of the air gap on the anti-DC component current transformer.The research results show that the air gap helps to improve the linear working range of the composite magnetic core,expand the linear current range during normal operation,and enhance the anti-saturation capability of the transformer.

关 键 词：抗直流分量 电流互感器 复合磁芯 空气缝隙 

分 类 号：TM93[电气工程—电力电子与电力传动]