搜索
本科毕业设计（论文）电能质量在线监测系统设计南东亮指导教师乐秀璠专业年级04级电气工程及其自动化学号04052431二〇〇八年六月中国南京摘要I摘要近年来，电力电子技术发展迅速，电力电子器件及电力电子设备应用越来越广泛，大量的非线性负荷、冲击性负荷的投运，使公用电网中产生了大量的谐波干扰、电压扰动，波动和闪变，电能质量不断恶化。同时，随着众多对电能质量要求敏感的控制设备、自动化设备被广泛的应用于工农业生产及人们日常生活，在对电能质量提出了越来越高的要求的同时，也赋予了电能质量新的含意。针对电能质量日益恶化以及用电设备对电能质量的要求相对提高这一现状，设计高精度的电能质量监测装置用以监测及分析电网电能质量，从而达到有效的控制和提高电能质量，有着十分重要的意义。本文设计了以TMS320F2812DSP为核心的电能质量在线监测系统。硬件部分的设计主要包括数据采集电路、CPU系统、人机接口电路和通信电路等。软件部分则完成了系统软件整体结构、系统总流程以及各个相应模块功能的设计。关键词：电能质量，在线实时监测，DSP，滤波，A/D,CCSAbstractIIAbstractInrecentyears,thepowerelectronictechnologydevelopsveryfastandthepowerelectronicdevicesandequipmentsapplicationismoreandmorewidespread.Thecommissioningofagreatdealofnonlinearorimpactloadsbringmassofharmonicdisturbing,voltageturbulenceandflickonthepublicelectricnetwork.Thepowerqualityisworsening.Atthesametime,alongwithsomanypowerqualitysensitivecontroldevicesandautomationequipmentsarewidelyusedintheindustryandagricultureproductionandthepeopledailylife,muchhigherrequestaresettothepowerquality.Atthesametime,thischangealsohasputrecentmeaningontopowerquality.Underthecurrentsituation,thepowerqualityisworseningdailyandtherequirementsoftheconsumersaremuchhigheratthesametime.ItisofgreatimportanceforthemonitoringandanalyzingthepublicelectricnetworkpowerqualitytodesignahighprecisionReal-TimeSystemforPowerQualityTesting.whichcaneffectivelycontrol,managementpowerquality。ThispaperisdesignedtoTMS320F2812DSPasthecoreofpowerqualityon-linemonitoringsystem.Hardwareincludingmainpartofthedesigndataacquisitioncircuit,CPUsystem,human-computeinterfacecircuitandcommunicationcircuit.Softwarecompletedpartoftheoverallstructureofthesystemsoftware,systemsandprocessesofthevariousmodulescorrespondingfunctionaldesign.KeyWords:powerquality,OnlineReal-TimeTesting，DSP，Filtering，A/D,CCS目录III目录摘要...............................................................................................................................................I目录.............................................................................................................................................III第一章绪论...................................................................................................................................11.1研究背景..........................................................................................................................11.2电能质量在线监测研究现状..........................................................................................21.3本文主要工作..................................................................................................................3第二章电能质量在线监测装置的硬件设计...............................................................................42.1系统设计总体结构图......................................................................................................42.2模拟量信号输入模块......................................................................................................42.3低通滤波器模块..............................................................................................................52.4AD转换模块...................................................................................................................82.4.1AD转换器的选择................................................................................................82.4.2AD7656简介........................................................................................................92.5DSP核心系统模块.......................................................................................................102.5.1DSP芯片结构特点和性能指标.........................................................................112.5.2DSP的选择........................................................................................................112.6电源模块........................................................................................................................122.6.1系统对电源的要求.............................................................................................122.6.2电源电路设计要点.............................................................................................132.7复位电路设计................................................................................................................142.8时钟电路设计...............................................................................................................152.8.1时钟电路的类型.................................................................................................152.8.2时钟电路的选择.................................................................................................162.9存储器电路设计............................................................................................................172.9.1DSP系统存储器电路基础.................................................................................172.9.2TMS320F2812的外部存储器接口....................................................................172.9.3TMS320F2812的外部存储空间分配及存储器选择........................................182.10人机接口模块...........................................................................................................