本课题研究以低压电网无功补偿改造为背景，研制了一种低压无功功率补偿控制器。作为一种非实时的无功补偿装置，该装置以定时的电网监测数据为依据，以低压电网的无功补偿为对象。本文主要研究了无功补偿对电网性能的改善，以及控制器的软硬件的配置。系统采用单片机，该单片机是美国ATMEL公司生产的低电压，高性能的CMOS8位单片机，具有运算速度高，实时性好的特点；软件则使用汇编语言进行编译；人机操作界面采用LCD显示,显示效果较好；A/D转换采用，是一款比较实用的A/D转换装置。该装置可跟踪电网无功功率的变化并自动补偿,实现了无功补偿装置的优化运行,具有体积小、原理简单、智能投切等优点。关键词：无功补偿,单片机,低电压ABSTRACTWhatthisarticlestudiesisbasedonthealterationofreactivepowercompensationoflowvoltage,thendesignanequipmentforreactivepowercompensationoflowvoltage.Asakindofreactivepowercompensation,thisequipmentisbasisontheelectricalnetworkmonitordata，andprovidesreactivepowerforcity’slowvoltagepowergrids.Thisthesishasdiscussedtheimportanceofthereactivepowercompensationforthepowergrids，andintroducedthehardwareandsoftwareofthecontroller.Thisdevice’shardwarecoreisAT89C52SCM，whichhasmanymeritssuchashighoperatingspeed.ThismonolithicintegratedcircuitisthelowvoltagewhichAmericanATMELCorporationproduces,ahighperformanceCMOS8monolithicintegratedcircuits；Thesoftwareusestheassemblylanguagetocarryonthetranslation；Theman-machineoperationcontactsurfaceusestheLCDdemonstration,thedemonstrationeffectisquitegood;A/DtransformationusesADC0809，itisasectionofquitepracticalA/Dswitchingdevice.Thisequipmentmaytracktheelectricalnetworkreactivepowerthechangeandtheautomaticcompensation,andthisinstallmenthasthevolumetobesmall,theprecisionishigh,thepricecomparedtothehighermerit.KEYWORDS:reactivepowercompensation，SCM(SingleChipMicyoco)，lowvoltage目录TOC\o"1-3"\h\z\uHYPERLINK\l"_Toc296197006"摘要PAGEREF_Toc296197006\hIHYPERLINK\l"_Toc296197007"ABSTRACTPAGEREF_Toc296197007\hIIHYPERLINK\l"_Toc296197008"目录PAGEREF_Toc296197008\hIIIHYPERLINK\l"_Toc296197009"第1章前言PAGEREF_Toc296197009\h1HYPERLINK\l"_Toc296197010"1．1无功补偿装置必要性PAGEREF_Toc296197010\h1HYPERLINK\l"_Toc296197011"1．2无功补偿装置的发展史PAGEREF_Toc296197011\h2HYPERLINK\l"_Toc296197012"1．3设计提要PAGEREF_Toc296197012\h4HYPERLINK\l"_Toc296197013"第2章无功补偿的理论分析PAGEREF_Toc296197013\h5HYPERLINK\l"_Toc296197014"2