基于DSP电力参数的检测系统

中华人民共和国教育部东北林业大学毕业设计设计题目：基于DSP电力参数的监测系统学生：冯培伟指导教师：孙丽萍教授学院：机电工程学院专业：电气工程及其自动化2008年6月东北林业大学毕业设计任务书设计题目基于DSP电力参数的检测系统指导教师孙丽萍教授专业电气工程及其自动化学生冯培伟2008年12月20日题目名称：基于DSP电力参数的检测系统任务内容（包括内容、计划、时间安排、完成工作量与水平具体要求）（1）课题内容简介：①对基于DSP的电力参数检测系统整体方案进行设计。②对系统进行设计，包括DSP最小系统、A/D转换电路、串行接口电路等。③对系统软件进行设计。④对系统抗干扰进行设计，包括硬件和软件抗干扰设计。⑤进行测试分析。（2）时间安排：①3月3日～3月26日实习、查阅资料、调研。②3月27日～4月23日确定系统组成、可行性论证。③4月24日～5月14日确定研究内容，系统实现，软件编程（包括系统功能、结构设计等）。④5月15日～6月10日系统测试，设计说明书撰写。（3）工作量：①设计说明书字数不少于15000字，中文参考文献篇数不少于20篇，外文参考文献不少于3篇，设计图纸1张以上。②将研究内容概括总结，反映研究内容的精华内容字数不少于400字。③设计所涉及的内容要熟悉，并掌握DSP的开发环境、使用、编程等专业知识。④毕业设计说明书要求排版、打印，统一按学校要求进行。其中：参考文献篇数：20篇以上；图纸张数：讲解图：A0图纸一张；外文翻译：不少于3篇。专业负责人意见签名：年月日基于DSP电力参数的检测系统摘要本系统应用了TMS320LF2407A数字信号处理器，对三相电网3路电压、3路电流、功率等基本参数的实时测量，还具备谐波分析功能。能够自动采集电网实时电压、电流等数据，采用交流采样技术，实现多种电力参数的在线实时测量;通过基于DSP芯片的FFT算法进行数据处理；并通过液晶屏显示三相电压平均值、三相电流平均值、谐波、功率等特征值和三相电压电流波形。还必须考虑准确、完整的电力参数检测和分析还具有数据上传功能，可以实现分析结果的实时上传，便于数据进一步分析、统计和存储，为电力部门的安全生产提供长期有效的依据。关键词：电力参数；TMS320LF2407A；数字信号处理；FFT；谐波分析；液晶屏DSP-basedpowerparametersofthedetectionsystemAbstractThesystemoftheTMS320LF2407Adigitalsignalprocessor,thethree-phasepowergridvoltage3Road,3Road,current,powerandotherbasicparametersofthereal-timemeasurement,withharmonicanalysis.Automaticallycollectingreal-timepowergridvoltage,currentandotherdata,usingsamplingtechniques,toachieveavarietyofelectricalparameterson-linereal-timemeasurement;BasedonDSPchipsbytheFFTalgorithmfordataprocessing,andthroughtheLCDscreendisplaythree-phasevoltageaverage,three-phaseCurrentaverage,harmonics,powerandothercharacteristicsofthree-phasevoltageandcurrentwaveforms.Mustalsobeconsideredaccurate,completepowersupplyparametersoftestingandanalysisofdatauploadfunction,canachievereal-timeanalysisoftheresultsoftheuploading,dataforfurtheranalysis,statisticsandstorage,forthesafetyofthepowersectortoprovidelong-termproductioneffectivebasis.Keywords:powerparameters;TMS320LF2407A;digitalsignalprocessing;FFT;harmonicanalysis;LCDscreen目录摘要Abstract1绪论···········································································································11.1DSP当今发展现状·······················································································11.2国内外研究概况··························································································11.3主要研究部分·····························································································22系统整体设计方案·························································································42.1电系统功能及其总体结构··············································································42.1.1系统实现功能··························································································42.1.2系统设计方案··························································································42.2DSP芯片的选择·························································································52.3DSP编程···································································································53电力参数测量及其计算原理·············································································93.1电力参数的直流采样算法·············································································93.2电力参数的交流采样算法··············································································93.2.1半周期积分法·························································································103.2.2均方根算法····························································································103.3基于FFT的电力参数测量···········································································103.3.1离散傅立叶变换······················································································113.3.2快速傅立叶变换······················································································123.3.3电力参数测量原理···················································································144系统硬件电路设计·······················································································164.1DSP最小系统设计····················································································164.1.1存储器扩展····························································································164.1.2复位电路·······························································································174.1.3时钟电路·······························································································174.1.4电源电路·······························································································184.2A/D转换电路··························································································194.3信号调理电路···························································································194.4时钟电路·································································································204.5键盘、液晶显示电路··················································································214.6串行通信接口电路·····················································································225系统软件设计··················································