【正文】 aspects of hardware and software. The author uses the modular design method to design the multifunctional electric power quality monitoring system, the system is divided to several modules such as signal acquisition module, signal processing module, manmachine interface and so on. The modules work in harmony through the exchange of information between them. The author designs the hardware part design method of circuit schematic diagram including the signal acquisition module and the signal processing module, and related expansion of the system circuit. The author designed the hardware part focusing on the harmonic analysis algorithm, using a highefficiency FFT algorithm for a real number input sequence. The author also analyses detailedly the spectrum leakage and fence effect acpanied by using FFT algorithm, bringing forward the interpolated FFT algorithm based on window function, and introduces how to actualize it in DSP. Then we give the simulation method in MATLAB to verify the correctness of the algorithm. Simultaneously, the thesis designs the digital filter based on window function to deal with spectrum aliasing. In addition, the thesis II 哈爾濱工業(yè)大學工學碩士學位論文 introduces the design method of bootloader function and the interface with other equipment for DSP. The system has very high measurement speed and the measuring accuracy, friendly interface, easy to operate, multifunction, convenient extension,easy to upgrade the hardware and software. So it has a high value for researching and practical application. Key words electric power quality monitoring system, harmonic analysis, digital filters, FFT, DSP III 哈爾濱工業(yè)大學工學碩士學位論文 目 錄 摘 要 ......................................................................................................................I Abstract ................................................................................................................. II 第 1 章 緒論 ............................................................................................................ 1 本文研究的背景和意義 ............................................................................... 1 電力監(jiān)測裝置的國內外研究現狀 ............................................................... 2 論文研究的主要內容 ................................................................................... 4 第 2 章 電力參數的測量原理 ................................................................................. 6 基本電參量的測量原理及方法 ................................................................... 7 三相交流電壓電流有效值的測量 ........................................................ 8 功率的測量 .......................................................................................... 8 電能質量指標的測量 ................................................................................... 9 電壓偏差的測量 ................................................................................... 9 頻率及頻率偏差的測量 ..................................................................... 10 諧波測量理論綜述 .................................................................................... 10 諧波的定義及其產生原因 ................................................................. 10 現存諧波測量方法的比較 ................................................................. 11 本章小結 .................................................................................................... 12 第 3 章 電力參數測量算法的分析研究及仿真 .................................................... 14 基于傅里葉變換的諧波分析算法 ............................................................. 14 按時間抽取 (DIT)的基 2FFT 算法原理 ............................................. 15 按時間抽取的 FFT 算法的特點 ......................................................... 17 實序列 FFT 的高效算法 .................................................................... 18 諧波分析中 FFT 算法存在的問題及解決辦法 .......................................... 20 基于加窗插值的 FFT 算法的分析與研究 .................................................. 23 常用窗函數及其特性 ......................................................................... 24 基于窗函數的插值 FFT 算法原理 ..................................................... 25 基于窗函數的插值 FFT 算法的 MATLAB 仿真分析 ........................ 28 本章小結 .................................................................................................... 30 第 4 章 電力參數實時測量系統(tǒng)的硬件設計 ........................................................ 31 系統(tǒng)硬件總體設計方案 ............................................................................. 31 多通道數據采集模塊的硬件設計 ............................................................. 32 信號調理單元的設計 ......................................................................... 32 A/D 數據采集模塊的設計 ................................................................... 34 DSP 數據處理模塊設計 .............................................................................. 37 IV 哈爾濱工業(yè)大學工學碩士學位論文 DSP 處理器芯片的選型 ...................................................................... 37 外部存儲器的擴展以及存儲空間配置 .............................................. 38 DSP 與 MCU 的接口設計 ...................................................................... 41 MCU 人機接口模塊設計 .............................................................................. 42 MCU 的選型及芯片介紹 ...................................................................... 42 液晶顯示電路的設計 ......................................................................... 43 鍵盤接口電路設計 ............................................................................. 44 串行通訊接口電路設計 ..................................................................... 45 本章小結 .................................................................................................... 45 第 5 章 電力參數實時測量系統(tǒng)的軟件設計 ........................................................ 46 CCS 集成軟件開發(fā)環(huán)境與設計原則 ..................