【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(xué)工學(xué)碩士學(xué)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(xué)工學(xué)碩士學(xué)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(cè)裝置的國(guó)內(nèi)外研究現(xiàn)狀 ............................................................... 2 論文研究的主要內(nèi)容 ................................................................................... 4 第 2 章 電力參數(shù)的測(cè)量原理 ................................................................................. 6 基本電參量的測(cè)量原理及方法 ................................................................... 7 三相交流電壓電流有效值的測(cè)量 ........................................................ 8 功率的測(cè)量 .......................................................................................... 8 電能質(zhì)量指標(biāo)的測(cè)量 ................................................................................... 9 電壓偏差的測(cè)量 ................................................................................... 9 頻率及頻率偏差的測(cè)量 ..................................................................... 10 諧波測(cè)量理論綜述 .................................................................................... 10 諧波的定義及其產(chǎn)生原因 ................................................................. 10 現(xiàn)存諧波測(cè)量方法的比較 ................................................................. 11 本章小結(jié) .................................................................................................... 12 第 3 章 電力參數(shù)測(cè)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(shí)間抽取 (DIT)的基 2FFT 算法原理 ............................................. 15 按時(shí)間抽取的 FFT 算法的特點(diǎn) ......................................................... 17 實(shí)序列 FFT 的高效算法 .................................................................... 18 諧波分析中 FFT 算法存在的問(wèn)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(shù)及其特性 ......................................................................... 24 基于窗函數(shù)的插值 FFT 算法原理 ..................................................... 25 基于窗函數(shù)的插值 FFT 算法的 MATLAB 仿真分析 ........................ 28 本章小結(jié) .................................................................................................... 30 第 4 章 電力參數(shù)實(shí)時(shí)測(cè)量系統(tǒng)的硬件設(shè)計(jì) ........................................................ 31 系統(tǒng)硬件總體設(shè)計(jì)方案 ............................................................................. 31 多通道數(shù)據(jù)采集模塊的硬件設(shè)計(jì) ............................................................. 32 信號(hào)調(diào)理單元的設(shè)計(jì) ......................................................................... 32 A/D 數(shù)據(jù)采集模塊的設(shè)計(jì) ................................................................... 34 DSP 數(shù)據(jù)處理模塊設(shè)計(jì) .............................................................................. 37 IV 哈爾濱工業(yè)大學(xué)工學(xué)碩士學(xué)位論文 DSP 處理器芯片的選型 ...................................................................... 37 外部存儲(chǔ)器的擴(kuò)展以及存儲(chǔ)空間配置 .............................................. 38 DSP 與 MCU 的接口設(shè)計(jì) ...................................................................... 41 MCU 人機(jī)接口模塊設(shè)計(jì) .............................................................................. 42 MCU 的選型及芯片介紹 ...................................................................... 42 液晶顯示電路的設(shè)計(jì) ......................................................................... 43 鍵盤(pán)接口電路設(shè)計(jì) ............................................................................. 44 串行通訊接口電路設(shè)計(jì) ..................................................................... 45 本章小結(jié) .................................................................................................... 45 第 5 章 電力參數(shù)實(shí)時(shí)測(cè)量系統(tǒng)的軟件設(shè)計(jì) ........................................................ 46 CCS 集成軟件開(kāi)發(fā)環(huán)境與設(shè)計(jì)原則 ..................