基于高精密总加器原理的强直流校验方法研究  

Research of calibrating heavy DC current method based on high- precision current adder principle

作　　者：任士焱[1] 刘情新 彭娟娟[1] 

机构地区：[1]华中科技大学强电磁工程与新技术国家重点实验室,湖北武汉430074

出　　处：《华中科技大学学报（自然科学版）》2014年第3期64-67,共4页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(51177061)

摘　　要：提出了基于高精密电流总加器原理的强直流校验方法.该总加器测量原理是以磁调制式直流电流比较仪原理为基础,以0.005%的高精度实现多路直流电流直接总加,解决了通过标准电阻进行间接电流总加的传统方法带来的精度低、受温度影响等问题.提出了绕组公约数原理与传感器误差补偿原理,解决了传感器的不同变比与传感器误差的影响问题.该校验方法构成以总加器为核心的总加测量校验系统,从而完成对强直流总电流测量装置的校验.最后,通过Matlab仿真与自校实验,验证了总加测量校验系统的精度等级能够达到0.005级.The calibrating high DC（direct current）current sensors′method based on high-precision current adder was presented.This adder,based on the DC current comparator principle,could add several direct currents directly with 0.005%accuracy,and solved problems of low precision and temperature influence caused by standard resistors.Additionally,the common divisor principle and the compensating sensors′error principle were presented to solve problems caused by different sensors′ rations and sensors′errors.The calibration system based on the current adder was created to calibrate heavy DC current sensors.At last,through Matlab simulation and self-calibration experiment,the adder precision which is better than 0.005is confirmed.

关 键 词：测量系统 校验 自校 绕组公约数原理 传感器误差补偿 

分 类 号：TM93[电气工程—电力电子与电力传动]