高精度直流电能表测试系统的研制  

Development of High Precision DC Energy Meter Test System

作　　者：肖鹏 侯琼 XIAO Peng;HOU Qiong(Institute of Electronics,National Institute of Measurement and Testing Technology,Chengdu 610051,China;College of Nuclear Technology and Automation Engineering,Chengdu University of Technology,Chengdu 610051,China)

机构地区：[1]中国测试技术研究院电子研究所,成都610051 [2]成都理工大学核技术与自动化工程学院,成都610051

出　　处：《科学技术与工程》2023年第25期10846-10855,共10页Science Technology and Engineering

基　　金：四川省重大科技专项项目(2018TZDZX0002,2019ZDZX0034);四川省科技项目(2018GFW0187);四川省基本科研业务费(2022JDKY0001);2020年内江市科技孵化和成果转化专项(2020KJFH003)。

摘　　要：为满足直流电在工业电力系统应用中的计量需求,克服传统电信号计量准确度不足、测量范围较窄等问题,设计了一种高精度直流电能表测试系统。系统以现场可编程门阵列(field program gate way, FPGA)芯片为硬件控制核心,由零磁通传感器、精密采样电阻、高精度ADC等组成采样电路,进行大量高速数据的采集及处理,最终以电能脉冲输出形式表征功率和电能测试值,实现对直流电参数的计量校准。实验测试表明,该系统直流电压和电流测试范围达到0~1 000 V和0~200 A,在测试范围内可以满足电能计量0.02级的准确度要求。In order to meet the measurement demand of direct current in the application of industrial power system,and overcome the problems of insufficient measurement accuracy and narrow measurement range of traditional electrical signals,a high precision DC energy meter test system was designed.Field program gate way(FPGA)was used as the hardware control center,and the sampling circuit was composed of zero flux sensor,precision sampling resistor,high-precision ADC,etc.A large amount of high-speed data was collected and processed,and finally the power and electric energy test values were characterized in the form of electric energy pulse output,so as to achieve the measurement and calibration of DC parameters.The experimental results show that the test range of DC voltage and current of the system reaches 0~1000 V and 0~200 A respectively,within the test range,it can meet the accuracy requirements of 0.02 level of electric energy measurement.

关 键 词：直流电 电能脉冲 数据采集 FPGA 模数转换 采样电阻 

分 类 号：TN707[电子电信—电路与系统]