基于离散傅里叶变换(DFT)法的三相电子式电能表设计  

The Design of Three-Phase Electronic Watt-Hour Meter Based on Discrete Fourier Transformation

作　　者：胡文霞 方慧琳 罗涛 

机构地区：[1]温州电力局,浙江温州325000

出　　处：《电气开关》2012年第2期32-34,共3页Electric Switchgear

摘　　要：在分析了傅立叶变换法(DFT)的基础上,完成了三相电子式电能表的主要芯片选型以及软、硬件设计。系统以电能计量芯片ATT7022A为核心,实现对三相电压、电流高次谐波及功率等参数的测量,采用磁保持继电器控制供电回路的通断状态。给出了主要接口电路的电路原理图,最后对系统的软件部分进行了初步的设计。Based on the analysis of discrete fourier transform, the paper achieves the selection of the main chips of three phase electronic watt-hour meter, hardware design and software design. The system takes ATT7022A as the main chip, realizes the measurement of three phase voltage, three phase current and higher harmonic and so on. The break- make state of magnetic latching relay control power-feed circuit is adopted. It presents the schematic of the main circuit. At last_ it nro^ont~ th＊＊ K^f o^cr _I^_：__

关 键 词：傅立叶变换法 DFT 数字式电能表 

分 类 号：TM93[电气工程—电力电子与电力传动]