一种电流比较仪电流比例有源微差补偿装置设计  

Design of a Current Proportional Active Differential Millisecond Device for Current Comparator

作　　者：韩博[1] 迟宗涛[1] 刘永刚 HAN Bo;CHI Zongtao;LIU Yonggang(The College of Electronic Information,Qingdao University,Qingdao 266071,China;Hunan Yinhe Electric CO.,Ltd,Changsha 410010,China)

机构地区：[1]青岛大学电子信息学院,山东青岛266071 [2]湖南银河电气有限公司,湖南长沙410010

出　　处：《青岛大学学报（工程技术版）》2022年第1期91-96,共6页Journal of Qingdao University(Engineering & Technology Edition)

基　　金：国家重点研发计划资助项目(2018YFF01012605)。

摘　　要：本文针对电流比较仪微差补偿装置自动化水平低,精确度易受电阻精度影响等问题,设计了一种高准确度、校准方便且自动化水平高的电流比较仪电流比例有源微差补偿装置。该装置基于单片机的12位二进制有源微差补偿装置,采用附加16位数字模拟转换器(digital to analog converter,DAC)灵活修正补偿装置二进制比例误差,可有效提高电流比较仪的准确度,并将二进制分流比例理论分辨率提升至28位,该装置采用基于数字信号处理(digital signal processing,DSP)的嵌入式数字电路实现系统的控制和算法,并通过源表法对该装置进行实验。实验结果表明,有源微差补偿装置的误差为10^(-6),相对标准差为2×10^(-7)。该研究为提高电流比较仪的自动化水平和用补偿方式解决电阻误差提供了参考。Aiming at the problems of low automation level and easy influence of resistance accuracy of current comparator millisecond compensation device,this paper designs a current proportional active millisecond compensation device of current comparator with high accuracy,convenient calibration and high automation level.The device is a 12 bit binary active millisecond compensation device based on single chip microcomputer.It uses an additional 16 bit digital to analog converter(DAC)to flexibly correct the binary proportional error of the compensation device,which can effectively improve the accuracy of the current comparator and improve the theoretical resolution of binary shunt ratio to 28 bits.The device is based on digital signal processing.The embedded digital circuit of digital signal processing(DSP)realizes the control and algorithm of the system.The experiment of the device is carried out by the source table method.The error of the active millisecond compensation device is 10^(-6) and the relative standard deviation is 10^(-7).This research provides a reference for improving the automation level of the current comparator and solving the resistance error by compensation.

关 键 词：电流比较仪 微差补偿装置 DAC DSP 

分 类 号：TM933.113[电气工程—电力电子与电力传动]