一种新型三相多功能电能测量系统设计

Design of three-phase multifunction energy metering system

在介绍ADE7758多功能芯片特性的基础上,提出一种新型三相多功能电能测量系统设计方案。该方案以ADE7758为计量芯片进行硬件电路设计,以P89C51RD2单片机作为系统处理器,设计了相应的测量系统软件及PC机应用软件,并对ADE7758实现谐波分析的特性进行了分析。用标准的测试设备对系统的测量精度进行了实验论证,实验结果表明:当电流在0.1-6.0 A时测量误差小于±0.5%,电压在150.57-260.18 V时测量误差小于±0.2%,具有较高的测量精度,可以满足电能测量的精度要求以及电力设备实时监控方面的要求。

A design scheme of three-phase multifunction energy metering system is given based on the introduction of ADE7758. ADE7758 is used as measuring IC, while single-chip P89C51 RD2 as system processor. The corresponding measuring system software and PC application software are designed as well. The harmonic analysis function of ADE 7758 is introduced. Its measurement accuracy is verified by the experiment using standard test instrument. Results show that,when current is between 0.1 and 6.0 A,the measurement error is within±0.5% ,while when voltage is between 150.57 and 260.18 V,the measurement error is within ±0.2%. Its high accuracy meets the requirements of energy metering and real-time supervision of electric equipment.