基于三相PWM整流器的蓄电池充放电系统的研究与设计本科生毕业论文(设计)题目：基于三相PWM整流器的蓄电池充放电系统的研究与设计专业班级：自动化二班PAGEIV基于三相PWM整流器的蓄电池充放电系统的研究与设计PAGEI摘要在蓄电池的生产过程中需要对蓄电池进行循环充放电，对蓄电池进行化成，以激活蓄电池。传统蓄电池充放电机大多采用晶闸管变流方式，网侧功率因数低，谐波污染严重。此处研发了一种基于PWM的蓄电池充放电机，该装置可运行于单位功率因数而使谐波变小，并且可将电池的放电能量馈送电网本文主电路采用三相电压型PWM整流器，这是一个强耦合、时变非线性系统，控制较为复杂。本论文侧重于工程设计与实现，综合考虑设计方案的可行性，可靠性，成本，生产工艺等方面的因素。主要包括控制方法的研究、空间矢量的实现、系统的硬件与软件设计。本文介绍三相PWM整流器的基本理论，先介绍PWM整流器的典型拓扑和工作原理，并建立了三相电压型PWM整流器在abc三相静止坐标系和dq两相同步旋转坐标系下的数学模型。基于dq数学模型，完整给出采用PI前馈解耦的双闭环控制结构。外环为电流或电压环，用于控制恒流充放电电流和恒压充电电压。内环为电流环，用于快速跟踪外环的指令，实现单位功率因数和正弦波电流控制。关键词：整流器；蓄电池；PWM；坐标变换AbstractThebatteryneedscharginganddischargingrepeatedlyinproducing,soasactivated.Mosttraditionalcharging-dischargingdeviceofstoragebatteryusingthyristorshasmanydisadvantages.Suchaslowpowerfactorandhighharmonics.AnovelbatterycharginganddischargingdevicebaseonPWMisresearchedanddeveloped,whichcanoperatewithunitpowerfactorandlowharmonics,andfeedthedischargedenergybacktotheutilityACline.Themaincircuitofthispaperisthree-phasevoltagesourcePWMrectifiers,whichisastrongcoupling,time-varyingnonlinearsystem,controlismorecomplicated.Thispaperfocusesontheengineeringdesignandimplementation.Ittakesvariouselementssuchasfeasibility,reliability,costandproductionengineeringintothecomprehensiveconsideration,includingtheresearchofcontrolmethods,theimplementationofspacevector,thedesignofhardwareandsoftware,andthedevelopmentofprototype.Thispaperintroducesthebasalofthree-phasevoltagesourcePWMrectifiers.Firstly,thetypicaltopologiesandprincipalofPWMrectifierisanalyzedinthispaper.Themathematicalmodelsofthree-phasevoltagesourcePWMrectifierinABCthree-phasestationaryanddqtwo-phasesynchronousrotatingcoordinatesystemareestablished.PIandfeedforwarddecouplingtwoloopcontrolmethodispresentedcompletelybasedondqmathematicalmodel.Theexternalloopistocontrolthecharging-dischargingcurrentortocontrolthechargingvoltage.Theinnerlooptailsthecurrentindexoftheexternallooptorealizeunitypowerfactorandsinusoidalcur