高磁导率比双铁芯电流互感器原理和误差性能研究  

Research of theory and error characters of high magnetic permeability ratio two cores current transformer

作　　者：熊魁[1] 岳长喜[1] 李登云[1] 朱凯[1] 李智成[1] Xiong Kui;Yue Changxi;Li Dengyun;Zhu Kai;Li Zhicheng(China Electric Power Research Institute,Wuhan 430074,China)

机构地区：[1]中国电力科学研究院,武汉430074

出　　处：《电测与仪表》2018年第17期114-119,共6页Electrical Measurement & Instrumentation

基　　金：国家电网公司科技项目(JL71-15-023)

摘　　要：不管是太阳风暴引起的地磁电流、直流输电运行产生的地中电流,还是新型非线性负载的接入都有使电网中产生直流分量,而直流会恶化电流互感器的误差特性,最终影响到仪表测量和电能计量的准确度。文章中开展了气隙电流互感器抗直流性能和误差性能的研究,在理论分析的基础上,提出一种结合气隙电流互感器和普通电流互感器的双铁芯电流互感器,建立双铁芯电流互感器的数学模型并阐述其误差性能,最后通过实验验证了双铁芯电流互感器的有效性。No matter geomagnetic induced current(GIC)which is caused by the solar storms or ground electrode current in HVDC transmission,besides with the connection of the new nonlinear loads are result in DC component in the grid,which leads to deterioration of error characters of current transformer,will influence the accuracy of the instrument measurement and power measurement.This paper developed the research of anti-saturation performance and error characters of the air gapped core current transformer.A two cores current transformer combines the air gapped core current transformer and traditional current transformer is put forward on the basis of theoretical analysis.The mathematical model of the two cores current transformer is established and the error characters are analyzed.The effectiveness of the two cores current transformer are validated by experiment at last.

关 键 词：电能计量 电流互感器 直流偏磁 抗饱和能力 等效电路 

分 类 号：TM933[电气工程—电力电子与电力传动]