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    摘要随着经济的持续发展和科学技术的进步,电网的智能化成为必然趋势。而智能电网实现电能信息全采集、全覆盖、全预付费的基础就是智能电表，智能电表的出现在一定程度上杜绝了原人工抄录出现的用电误读、误抄、漏抄和抄表不及时等问题。可以说，智能电表是未来智能电网终端的发展方向。
      论文主要工作是对多功能智能电表进行设计。电表的基础功能是计算电量，为了使计量更精确，文中通过C语言编写仿真程序得到加窗插值FFT算法计算的各次谐波数据，发现其比普通FFT算法准确得多。针对多功能智能电表的特点，提出了整体的设计方案。电表以dsPIC33和AT89C52为核心，dsPIC33负责处理数据，其算法是以加窗插值FFT算法为基础，通过C语言编程仿真比较其与理论值的误差。而AT89C52专门负责显示、通信和数据存储，通过Keil和Proteus联合仿真验证了单片机程序的可行性。9395
    关键词:  多功能智能电表 FFT  电能计量 dsPIC33  AT89C52
    毕业设计说明书（论文）外文摘要
    Title  Reseach and design of muliti-functional smart meters                                                      
    With the sustained economic development and scientific and technological progress, the smart grid has become an inevitable trend. But the basis of smart Grid to achieve full energy information collection, full coverage and full pre-paid is smart meter. To a certain extent smart meters put an end to the misreading of the original artificial reproduces electricity, mistakenly copied, leakage copy and meter reading not timely and other issues. It can be said that the smart meters is the future direction of development of smart grid terminal.
    The main content of this paper is to design multi-functional smart meter. The meter's basic function is to calculate the power, in order to make the measurement more accurate, select the windows and interpolated FFT algorithm to calculate the harmonic data by programs written in C language, and find it more accurate than the ordinary FFT algorithm. Take into account characteristics of multi-functional smart meter, the overall design scheme is raised. The smart Meter takes dsPIC33 and AT89C52 as the core, the dsPIC33 responsible for processing data, its algorithm is based on windows and interpolated FFT algorithm, what’s more, get the error with the theoretical value by C language programming. AT89C52 specifically responsible for the display, communications and data storage, verify the feasibility of the microcontroller program by Keil and Proteus simulation.
    Keywords: multi-functional smart meter   FFT  energy metering  dsPIC33   AT89C52
    目录
    1 绪论1
    1.1 研究背景1
    1.2 国内外相关技术发展1
    1.3  多功能智能电表设计原理2
    1.4 结论2
    2  谐波功率测量理论和仿真分析4
    2.1 谐波概念4
    2.2 谐波功率的产生及危害4
    2.3 谐波功率流向5
    2.4 谐波电能计量算法5
    2.5 仿真分析谐波测量方法6
    2.6本章小结10
    3  电能计量算法和仿真11
    3.1 电能计量算法12
    3.2  电能计量算法仿真12
    3.3本章小结14
    4　硬件电路15
    4.1 总体结构设计15
    4.2 电源16
    4.3  互感器和信号调理17
    4.4 模数转换17
    4.5 数据计算模块29
    4.6 复位信号模块20
    4.7 单片机AT89C52及其周边电路21
    4.8外部实时时钟芯片DS130222
    4.9 看门狗芯片SP70623
    4.10 外部存储器EEPROM22
    4.11 电力载波通信23
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