基于参考电流增量法的感应分流器校验方法  

Calibration of inductive current divider based on reference current increment method

作　　者：郭森林 朱江淼[1] 耿西西 潘仙林[2] 石照民 金涛 GUO Senlin;ZHU Jiangmiao;GENG Xixi;PAN Xianlin;SHI Zhaomin;JIN Tao(Beijing University of Technology,Beijing 100124,China;National Institute of Metrology,Beijing 100029,China;China Jiliang University,Hangzhou 310018,China)

机构地区：[1]北京工业大学,北京100124 [2]中国计量科学研究院,北京100029 [3]中国计量大学,杭州310018

出　　处：《电测与仪表》2024年第10期175-180,共6页Electrical Measurement & Instrumentation

基　　金：国家自然科学基金资助项目(62101521)。

摘　　要：感应分流器具有高准确度和高稳定性的电流比例,在电流互感器检定领域有着广泛的应用。文中提出了一种基于参考电流增量法原理的感应式分流器校验方法,文中介绍了参考电流增量法的基本原理;分析了参考电流互感器和差值电流测量线路的设计原理;搭建了感应分流器自校验的实验线路;对研制的双级感应分流器在50 Hz~1 kHz频率范围进行了校验,并对校验结果进行了不确定度分析。实验结果表明,在50 Hz~1 kHz频率范围内,双级感应分流器比值差测量合成标准不确定度优于5×10^(-8) A/A,相位差测量合成标准不确定度优于1×10^(-7) rad。Inductive current divider has high accuracy and high stability of current ratio,which is widely used in the verification of current transformer and other fields.In this paper,a method for calibrating inductive current divider based on the principle of reference current increment method is proposed,and the basic principle of reference current increment method is introduced;the design principles of reference current transformer and differential current measurement circuit are analyzed;the experimental circuit for the self-calibration of the inductive current divider is built;the developed two-stage inductive current divider is calibrated in the frequency range of 50 Hz~1 kHz,and the uncertainty of the calibration result is analyzed.The experimental results show that,in the frequency range of 50 Hz~1 kHz,the measurement synthetic standard uncertainty of the ratio difference of the two-stage inductive current divider is better than 5×10^(-8) A/A,and the measurement synthetic standard uncertainty of the phase difference is better than 1×10^(-7) rad.

关 键 词：双级感应分流器 参考电流增量法 电流比例 容性泄漏 

分 类 号：TM933[电气工程—电力电子与电力传动]