用于三相标准电能表的高精度数据采集系统  

High precision data acquisition system for three-phase standard energy meter

作　　者：申莉[1] 毕伟[1] 甘依依[1] 陆俊 

机构地区：[1]国网湖北省电力公司电力科学研究院,武汉430077 [2]上海雷锐精密仪器有限公司,上海200030

出　　处：《电测与仪表》2015年第18期46-50,95,共6页Electrical Measurement & Instrumentation

摘　　要：用电负荷的大范围波动导致传统电能表计量误差很大。设计了一种应用于0.05级三相标准电能表的数据采集系统,该系统由高精度数据采集电路和FPGA搭建而成。高精度数据采集电路由信号调理电路和24位A/D转换器组成,采样率高达52.73k Hz,满足了系统采集精度的要求。采集系统的精度通过采集直流电压信号进行测试,误差小于0.02%。Wide range fluctuation of electrical load leads the large measurement error of traditional electric energy me -ter.This paper designed a high precision data acquisition system for 0.05 class three-phase standard energy meter . The system is composed of FPGA and high precision data acquisition circuit .The high precision data acquisition cir-cuit consists of signal modulate circuit and 24 bit A/D converter, and the sampling rate is up to 52.73 kHz, which meet the requirement of acquisition precision .The precision of acquisition system is test by acquiring D .C.voltage signals, and the error is less than 0.02%.

关 键 词：A/D采集 FPGA 三相标准电能表 信号调理 

分 类 号：TM933.4[电气工程—电力电子与电力传动]