MATLAB在静止无功补偿中的应用

安徽工业大学毕业设计（论文）说明书第-1-页┊┊┊┊┊┊┊┊┊┊┊┊┊装┊┊┊┊┊订┊┊┊┊┊线┊┊┊┊┊┊┊┊┊┊┊┊┊┊┊┊┊┊┊┊┊┊┊┊┊┊装┊┊┊┊┊订┊┊┊┊┊线┊┊┊┊┊┊┊┊┊┊┊┊┊┊┊┊┊┊┊┊摘要本文主要介绍MATLAB在静止无功补偿设计中的应用。总结了几种常见的无功补偿装置，并比较了其优点及缺点。研究了静止无功补偿器（SVC)在提高电网电压稳定性中的应用，对静止无功补偿器SVC的功能进行了说明。阐述了各种静止无功补偿技术的原理、优点、缺点以及其在电力系统中的应用情况。阐述了一种TCR-TSC型无功补偿装置（SVC)设计，对系统级模型进行理论分析，采用MATLAB对模拟系统进行了仿真。仿真结果表明加入SVC装置的系统可以有效改善电网系统电压变化，能显著改善电网系统中电压质量。关键词：静止无功补偿装置,功率因数，MATLAB仿真MATLAB在静止无功补偿设计中的应用第-2-页┊┊┊┊┊┊┊┊┊┊┊┊┊装┊┊┊┊┊订┊┊┊┊┊线┊┊┊┊┊┊┊┊┊┊┊┊┊┊┊┊┊┊┊┊ABSTRACTThispaperdescribestheMATLABapplicationinthedesignofStaticVarCompensator.Itsummarizesseveralcommonreactivepowercompensation,theirstrengthsandweaknessesarecompared.Theapplicationofstaticvarcompensatortoimprovevoltagestabilityofpowergridwasstudied.Thefunctionofstaticvarcompensator(SVC)wasexplained.Theprinciple,advantageousanddrawbackofvariousstaticvarcompensatorandthereapplicationintheelectricsystemwereexpounded.ATCR-TSCstaticvarcompensator(SVC)isdesignedinthispaper.ItistheoreticallyAnalysistheSVCsystem-levelmodel.ThenthemodelsystemissimulatedbyusingMATLAB.ThesimulationresultsshowthattheSVCdevicecaneffectivelyimprovethepowersystemvoltagechangescansignificantlyimprovethevoltagequalityinthegridsystem.Keywords：StaticVarCompensator(SVC)，Powerfactor，MATLABSimulation安徽工业大学毕业设计（论文）说明书第-3-页┊┊┊┊┊┊┊┊┊┊┊┊┊装┊┊┊┊┊订┊┊┊┊┊线┊┊┊┊┊┊┊┊┊┊┊┊┊┊┊┊┊┊┊┊┊┊┊┊┊┊装┊┊┊┊┊订┊┊┊┊┊线┊┊┊┊┊┊┊┊┊┊┊┊┊┊┊┊┊┊┊┊目录1.引言...................................................................................................................51.1课题背景..................................................................................................51.2国内外研究现状和研究意义..................................................................61.3论文工作介绍..........................................................................................92.无功功率及无功补偿概述.............................................................................102.1无功功率...............................................................................................102.2无功补偿的意义与作用........................................................................122.2.1无功补偿概述.............................................................................122.2.2无功补偿的意义与作用.............................................................122.3无功补偿基本事项................................................................................142.3.1无功补偿的原则........................................................................142.3.2无功补偿的方式.........................................................................142.3.4配电网无功补偿存在的问题....................................................152.4无功补偿发展历程................................................................................163.静止无功功率补偿器.....................................................................................193.1概述........................................................................................................193.2SVC分类...............................................................................................203.3SVC动态补偿原理...............................................................................203.4晶闸管相控电抗器（TCR）...............................................................213.4.1TCR结构....................................................................................223.4.2TCR的运行特性........................................................................233.5晶闸管投切电容器（TSC）................................................................243.5.1TSC的结构................................................................................243.5.2TSC的运行特性.........................................................................254.MATLAB仿真................................................................................................264.1MATLAB概述......................................................................................264.2仿真的必要性和优越性........................................................................284.3基于TCR和TSC仿真模型................................................................294.3.1晶闸管控制电抗器仿真图.........................................................304.3.2晶闸管投切电容器仿真图.........................................................314.3.3SVC控制系统............................................................................324.4仿真分析及结论....................................................................................34总结与展望..........................................................................................................36致谢......................................................................................................................38MATLAB在静止无功补偿设计中的应用第-4-页┊┊┊┊┊┊┊┊┊┊┊┊┊装┊┊┊┊┊订┊┊┊┊┊线┊┊┊┊┊┊┊┊┊┊┊┊┊┊┊┊┊┊┊┊参考文献..............................................................................................................39安徽工业大学毕业设计（论文）说明书第-5-页┊┊┊┊┊┊┊┊┊┊┊┊┊装┊┊┊┊┊订┊┊┊┊┊线┊┊┊┊┊┊┊┊┊┊┊┊┊┊┊┊┊┊┊┊┊┊┊┊┊┊装┊┊┊┊┊订┊┊┊┊┊线┊┊┊┊┊┊┊┊┊┊┊┊┊┊┊┊┊┊┊┊1.引言1.1课题背景在电力系统中，供电的质量、电网运行的安全可靠性和经济性是最根本的问题。快速合理地调节电网无功功率，对交流电网的电压稳定和系统电压的调节，合理分配潮流及限制电网过电压方面有着十分重要的意义。随着电力工业的高速发展，超高压、特高压电网相继投入运行，人们对供电质量及可靠性的要求越来越高。由此产生了一系列问题：超高压大电网的形成及负荷变化加剧，要求大量快速响应的可调无功电源来补偿系统所缺无