智能电能表自动化检定流水线的温度参比条件影响分析  

Analysis of temperature condition influence of automatic calibrating conveyor line in smart electricity meter

作　　者：白静芬 卢达 徐励 王学伟[2] 高雨翔 Bai Jingfen;Lu Da;Xu Li;Wang Xuewei;Gao Yuxiang(China Electric Power Research Institute Co.,Ltd.,Beijing 100192,China;School of Information Science and Technology,Beijing University of Chemical Technology,Beijing 100029,China;State Grid Jiangsu Electric Power Co.,Ltd.,Nanjing 211103,China)

机构地区：[1]中国电力科学研究院有限公司,北京100192 [2]北京化工大学信息科学与技术学院,北京100029 [3]国网江苏省电力有限公司,南京211103

出　　处：《电测与仪表》2020年第11期121-126,共6页Electrical Measurement & Instrumentation

基　　金：国家电网有限公司总部科技项目“智能电能表大规模自动化检定的关键参比条件适用性研究与优化”(JL71-18-016)。

摘　　要：文中建立智能电能表结构化模型,分析确定智能电能表受温度影响产生误差的主要因素,即AD转换器基准电压受温度影响的变化。采用机理建模的方法,建立了CMOS带隙基准源和AD转换器受温度影响的数学模型,采用普遍应用的点积和电能测量算法,研究分析基准电压随温度的变化对智能电能表误差的影响及关系;并通过试验,给出智能电能表误差变化随温度与时间变化的关系曲线。根据被试电能表的等级,给出大规模智能电能表自动化检定流水线的温度参比条件的建议。A structured model of smart electricity meters is firstly established in this paper,and the main factors that lead to smart electricity meters errors is analyzed and determined,that is the change of reference voltage of AD converter with temperature.Then,the mathematical models of CMOS bandgap reference and AD converter affected by temperature are established.And the influence and relationship between the reference voltage of smart electricity meter and temperature is studied and analyzed through using the commonly used point product energy measurement algorithm.The relationship curve between the error change of smart electricity meter and the temperature change with time is given through experiments.Finally,according to the accuracy level of the tested smart electricity meter,the suggestions on temperature reference conditions of automatic calibration conveyor line of large-scale smart electricity meters is proposed.

关 键 词：智能电能表 自动化检定 温度参比条件 ADC温度影响模型 电能表误差 

分 类 号：TM933[电气工程—电力电子与电力传动]