简介:许多人都喜欢看小说,但小说究竟是什么呢?Along,imaginaryprosestoryaboutpeo-pleisusuallycalledanovel.Itcanbeaboutanykindofman,wom-an,orchild.Itcanbeaboutkings,orChicagonewsboys,orhousewives.TheFrenchman,VictorHugo(雨果),wrotehisnovelLesMiserables(《悲惨世界》)aboutapoormanwhostolealoafofbreadtokeepfromstarving.TheAmerican,ErnestHemingway(海明威),wroteAfarewelltoArms(《永别了,武器》)aboutayoungAmericanwithnurseduringWorldWarI.Anovelcantellthestor...
简介:ACalculationoftheMagneticCircuitofaVariable-PoleSynchronousGenerator;Acontroldesignforaclassofnonlinearsystemsusinglineal-techniques;Aframeworktojustifytheneglectofarmaturetransientsinpowersystemstabilityanalysis;ASimpleMaximumPowerPointTrackerforGridconnectedVariableSpeedWindEnergyConversionSystemwithReducedSwitchCountPowerConverters;Athermalmodelforthewater-cooledstatorbarsofthesynchronousgenerator;AdaptiveCriticDesignsandtheirImplementationsonDifferentNeuralNetworkArchitectures;
简介:ConjugateHeatTransferAnalysisofaSalientPoleRotorinanAirCooledSynchronousGenerator,ConstraintsfortheInterconnectionofDistributedGenerationinRadialDistributionSystems,ControlofdynamicovervoltageduetoloadrejectionbyanadaptiveneuralnetworkSTATCOM,Controlofself-excitedinductiongenerators,Dampingofthelow-frequencyoscillationsofthegenerator:dynamicinteractionsandtheeffectivenessofthecontrollers,Designandanalysisof42-Vpermanent-magnetgeneratorforautomotiveapplications,Designofsecondorderslidingmodecontrollerforsynchronousgeneratorsbasedonsingularperturbationmethod,Experimentalstudieswithsimpleneuro-controllerbasedexcitationcontroller。
简介:摘要电磁谐振是电路里的电感和电容等蓄能元件在特定的条件下产生的电磁共振,分并联谐振和串联谐振。在没有特别需要和设备控制的情况下,这种谐振是有害的,能对电器设备造成很大的破坏。这种谐振的原理和通常的、谐振一样,是蓄能元件的相互释能引起的,蓄能元件的容量越大,谐振的能量就越强。对电力系统而言,若发生电磁谐振,将影响电力系统设备的安全运行,使电力系统安全、可靠、稳定、连续供电的局面遭到破坏,影响重要用户的正常供电;严重时,会造成大面积的停电事故,除了给企业造成不良的社会影响,还会使企业蒙受损失。因此,电力系统中要时时刻刻防控电磁谐振的发生。
简介:电力电容器是补偿电力系统静态无功的基本元件,本文采用Buck型交流变换器对其进行改造形成动态电容器,在多同步旋转坐标系下采用偶次谐波调制的控制方法,进行了动态电容器的Matlab/Simulink建模仿真,验证了其无功和谐波等复合补偿功能。同时,理论分析表明,静态和动态电容器均可能导致电力系统谐波谐振问题,在检测网侧电流对动态电容器进行控制的情况下,控制系统的环路稳定性因谐波谐振的存在而遭到破坏,可以通过改变谐振谐波检测指令极性的方法对其进行有效抑制,初步的仿真结果完全验证了上述分析的正确性。