电力系统稳定器pss设计与仿真

I电力系统稳定器PSS的设计与仿真摘要由于电力系统在正常运行时会发生频率的振荡，对我们的生产生活带来了很多的危害，给我国的国民经济造成了巨大的损失。如果在电力系统中加入PSS后会对系统的稳定性提高给予了很大的帮助。电力系统稳定器就是为抑制低频振荡而研究的一种附加励磁控制技术。它在励磁电压调节器中，引入领先于轴速度的附加信号，产生一个正阻尼转矩，去克服原励磁电压调节器中产生的负阻尼转矩作用,用于提高电力系统阻尼，解决低频振荡问题，是提高电力系统动态稳定性的重要措施之一。本文首先分析了电力系统稳定器的研究背景和国内外研究状况，然后又对无限大系统的数学模型进行了具体的分析，然后又分析了系统带PSS和不带PSS时系统的运行情况，最后对两种情况进行了比较，分析了PSS的优点和缺点，同时对电力系统的未来提出了更高的挑战。关键词：励磁控制技术;低频振荡；电力系统稳定器IIDesignandSimulationofPowerSystemStabilizer(PSS)ABSTRACTThispaperdescribesthepowersystemstabilizer'sdesignprinciplesandtheimpactonthepowersystem,theuseofthebenefitsofpowersystemstabilizer.ThefrequencyofoscillationmaybehappentopowersystemwhenthesystemInthenormaloperation.ItgivesagreathelpifthepowersystemaftertheadditionofPSS.Powersystemstabilizer(PSS)istosuppressalowfrequencyoscillationofadditionalexcitationcontrol.Itistheexcitationvoltageregulator,theintroductionofaxialvelocityaheadofadditionalsignalstoproduceapositivedampingtorquetoovercometheprimaryexcitationvoltageregulatorproducednegativedampingtorqueeffect.Improvingpowersystemdamping,lowingfrequencyoscillationproblemsolvingistoimprovepowersystemdynamicstabilityoftheimportantmeasures.Thispaperanalyzesthepowersystemstabilizerresearchbackgroundandresearchstatusathomeandabroad,andthentotheinfinitesystemofmathematicalmodelsofspecificanalysis,andthenanalyzedthesystemwithPSSandwithoutPSSoperationofthesystem,andfinallyOfthetwocaseswerecomparedandanalyzedtheadvantagesanddisadvantagesofPSS,whilethefutureofthepowersystemofahigherchallenge.Keyword:Excitationcontrol；Low-frequencyoscillation；PowerSystemStabilizerIII目录摘要.............................................................................................................IABSTRACT....................................................................................................II1绪论.........................................................................................................11.1研究背景及国内外相关现状..................................................................11.1.1研究背景............................................................................................11.1.2国内外研究状况..............................................................................11.2电力系统稳定.............................................................................................31.3本论文的主要工作....................................................................................62无限大系统的数学模型........................................................................72.1帕克变换......................................................................................................72.2无限大系统数学模型...............................................................................92.2.1发电机数学模型..............................................................................92.2.2励磁系统的数学模型..................................................................112.2.3汽轮机及其调节系统的数学模型...........................................122.3负荷方程....................................................................................................132.3.1线路正常运行................................................................................142.3.2双回路线路中有一点发生短路................................................142.4计算、、、的值.......................................................................153无限大系统暂态分析..........................................................................163.1系统各个部分的非线性模型...............................................................16IV3.1.2调节励磁系统的非线性模型....................................................163.1.3汽轮机及其调节系统的非线性模型......................................173.2调节励磁系统参数eK和eT的选择......................................................173.2.1当0.2eT，25eK时的特征值计算.......................................173.2.2当0.05eT，100eK时的特征值计算...................................184PSS的设计.............................................................................................214.1电力系统稳定器的设计原理...............................................................214.1.1PSS网络的设计............................................................................214.1.2汽轮机及其调节系统超前补偿网络的设计........................224.2本章小结....................................................................................................245PSS的MATLAB仿真分析.................................................................255.1MATLAB的概述...........................................................................................255.2几个参数的确定......................................................................................255.2.1PSS网络的计算............................................................................255.2.2汽轮机及其调节系统的超前补偿网络的计算....................265.2.3求矩阵A的特征值........................................................................275.3在含有PSS的情况下系统的状态......................................................285.4主要结论....................................................................................................30致谢...........................................................................................................31参考文献.............