谐波对电磁式互感器测量的影响研究  

Research on the influence of harmonics on the measurement of electromagnetic transformers

作　　者：李猷民 姜建平 菅有为 李小飞 杨永鑫 LI Youmin;JIANG Jianping;JIAN Youwei;LI Xiaofei;YANG Yongxin(State Grid Shandong Electric Power Maintenance Company,Ji’nan 250018;School of Electrical Engineering,Shandong University,Ji’nan 250061)

机构地区：[1]国网山东省电力公司检修公司,济南250018 [2]山东大学电气工程学院,济南250061

出　　处：《电气技术》2021年第2期36-41,共6页Electrical Engineering

基　　金：国网山东省电力公司检修公司2019年度科技项目(520618180039)。

摘　　要：互感器是配电网控制与保护的基础,在谐波条件下其测量准确度直接关系到电网的安全稳定运行。本文通过对目前低压配网中主要的电磁式互感器——电磁式电压互感器以及电磁式电流互感器进行建模分析,在其谐波传递特性的基础上,分析不同频率谐波条件对电磁式互感器测量误差的影响,并在Matlab中进行了仿真验证,所得结论为电磁式互感器在谐波条件下的应用提供了参考。Transformers are the basis of distribution network control and protection.Under harmonic conditions,their measurement accuracy will directly affect the safe and stable operation of the power grid.In this paper,the main electromagnetic transformers in the current low-voltage distribution network-electromagnetic voltage transformers and electromagnetic current transformers-are modeled and analyzed.On the basis of their harmonic transfer characteristics,the influence of different frequency harmonic conditions on the measurement error of electromagnetic transformers is analyzed.The influence of the measurement error of the built-in transformer is verified by simulation in Matlab.The conclusions obtained provide a reference for the application of the electromagnetic transformer under harmonic conditions.

关 键 词：电磁式互感器 谐波 宽频建模 测量误差 MATLAB仿真 

分 类 号：TM45[电气工程—电器]