直流分量和谐波分量对电流互感器传输特性影响  

Influence of DC component and harmonic component on transmission characteristics of current transformer

作　　者：王亮[1] 曾伟杰 田娟 戴莲丹 刘型志 崔晨辉 WANG Liang;ZENG Weijie;TIAN Juan;DAI Liandan;LIU Xingzhi;CUI Chenhui(School of Electrical Engineering,Xi’an Jiaotong University,Xi’an 710049,China;State Grid Hunan Electric Power Co.Marketing Service Center,Changsha 410004,China;State Grid Chongqing Electric Power Co.Marketing Service Center,Chongqing 401123,China)

机构地区：[1]西安交通大学电气工程学院,陕西西安710049 [2]国网湖南省电力有限公司供电服务中心(计量中心),湖南长沙410004 [3]国网重庆市电力公司营销服务中心,重庆401123

出　　处：《电机与控制学报》2023年第5期1-8,共8页Electric Machines and Control

基　　金：国家自然科学基金(52177009)。

摘　　要：电流互感器二次侧电流能否真实反映一次侧电流会受到直流分量以及谐波分量的干扰,影响电能计量公平性以及继电保护装置能否准确动作。首先从理论上阐明了电流互感器的误差影响因素,然后通过仿真与实验分别探究了谐波分量和直流分量对电流互感器比值误差和相角误差影响的程度,为电流互感器在不同工况干扰下的误差提供了参考数据。仿真和实验结果一致表明,由于直流分量可能更多地转化成励磁电流,使得铁心励磁特性变差,从而对误差造成更大的影响,比值误差差影响最高在1%左右;而谐波分量产生的交变磁通可以通过铁心耦合到二次侧,所以谐波分量对误差的影响较小,比值误差影响不超过0.1%。Current transformers are currently widely used in electric energy measurement and relay protection,but whether the secondary side current truly reflects the primary side current will be disturbed by the DC component and the harmonic component,thus affecting the fairness of electric energy measurement and the accurate action of the relay protection device.The error factors of current transformer were illustrated,then the influence of the current transformer ratio error and phase angle error was explored,and reference data for the error of the current transformer was provided under various operating conditions.The experiment and simulation results show that the DC component can be more converted into the excitation current,so that the error;the harmonic component can be coupled to the secondary side,so the harmonic component affects the error.

关 键 词：电能计量 电流互感器 传输特性 J-A磁滞模型 比值误差 相角误差 

分 类 号：TM452[电气工程—电器]