数字工频频率计频率测量结果的不确定度评定  

Evaluation of Uncertainty in Frequency Measurement Results of Digital Power Frequency Meters

作　　者：李金俊 叶加星[2] 王永淳 Li Jinjun;Ye Jiaxing;Wang Yongchun(Marketing Service Center,State Grid Jiangsu Electric Power Co.,Ltd.,Nanjing Jiangsu 210000;Jiangsu Frontier Electric Technology Co.,Ltd.,Nanjing Jiangsu 211102;Tongji University,School of Electronic and Information Engineering,Shanghai 200092)

机构地区：[1]国网江苏省电力有限公司营销服务中心,江苏南京210000 [2]江苏方天电力技术有限公司,江苏南京211102 [3]同济大学电子与信息工程学院,上海200092

出　　处：《中国仪器仪表》2025年第2期54-57,共4页China Instrumentation

摘　　要：本文按照JJG 603-2018《频率表》和JJF 1059.1《测量不确定度评定与表示》的要求,使用HP3325B型合成/函数信号发生器作为数字工频频率源,对高精度多功能标准表测量结果进行误差分析,通过对在规定测量条件下测得的量值用统计分析的方法得到A类不确定度,用不同于测量不确定度A类评定的方法对测量不确定度分量进行评定得到B类不确定度,从而生成合成不确定度,对频率测量的结果进行了扩展不确定度的分析与评定。In accordance with the requirements of JJG 603-2018"Frequency Meter"and JJF1059.1"Evaluation and Representation of Measurement Uncertainty",this article uses HP3325B composite/function signal generator as a digital power frequency source to analyze the measurement results of 704-3 digital frequency meter(7-bit digital display mode).The A-class uncertainty is calculated,and the B-class uncertainty is obtained using analytical and statistical methods to generate the composite uncertainty,Expanded uncertainty analysis and evaluation were conducted on the results of frequency measurement.

关 键 词：频率测量 校准 不确定度 分析与评定 

分 类 号：TM9[电气工程—电力电子与电力传动]