直流电能校准系统研制及不确定度评定  

Development and Uncertainty Evaluation of Calibrating System for DC Energy Meter

作　　者：白静芬[1] 林繁涛[1] 赵莎[1] 于海波[1] 杨湘江[1] 

机构地区：[1]中国电力科学研究院,北京100192

出　　处：《电测与仪表》2014年第7期9-13,共5页Electrical Measurement & Instrumentation

基　　金：国家重点基础研究发展计划项目(973项目)(2012CB724400)

摘　　要：描述的直流电能计量标准装置采用直流电流比较仪技术扩展直流电流量程,测量电流最大达到600A。使用高精度数字采样及同步技术实现直流电能的精确计量,减小直流源不稳定对装置测量不确定度的影响,装置最终测量范围10mV^1000V,10mA^600A,扩展不确定度小于120×10-6。同时着重介绍了基于分步评定方法的装置测量不确定评定过程。A system for calibration DC （direct current） energy meters using DC current-comparator and sampling technology is described in this paper, whose maximum current measurement is able to reach 600A. The implementations of high-precision digital sampling and synchronization technology for precise measurement of DC power reduce the impact on the measurement uncertainty by instable DC source, which achieve the measurement ranges are from 10mV to 1000V in voltage, and from 10mA to 600A in current, and the systematic uncertainty of the calibration system is less than 120 ×10 ^-6. At the same time, this paper focuses on the evaluation process for step-by-step evaluation device.

关 键 词：直流电能 标准装置 直流比较仪 采样原理 

分 类 号：TM93[电气工程—电力电子与电力传动]