Z源光伏并网逆变器的仿真分析及控制系统设计的中期报告【摘要】本文主要是关于基于PSCAD/EMTDC仿真平台进行的Z源光伏并网逆变器的仿真分析以及控制系统设计的中期报告。文章首先介绍了Z源逆变器的工作原理以及其与传统逆变器的区别，接着对PSCAD/EMTDC软件进行了简要介绍，并在此基础上建立了Z源逆变器的仿真模型。随后，对仿真模型进行了基础测试，以检验其正确性，并对逆变器模型进行了电路参数优化，以提高其工作效率。最后，本文介绍了Z源逆变器控制系统的设计方案，包括基于SPWM控制的电路设计以及软件设计等内容，为下一步的仿真和实验工作奠定了基础。【关键词】Z源逆变器；PSCAD/EMTDC仿真平台；仿真模型；电路控制系统【Abstract】Thispaperismainlyamid-termreportonthesimulationanalysisandcontrolsystemdesignoftheZ-sourcephotovoltaicgrid-connectedinverterbasedonthePSCAD/EMTDCsimulationplatform.ThearticlefirstintroducestheworkingprincipleoftheZ-sourceinverteranditsdifferencesfromtraditionalinverters,andthenbrieflyintroducesthePSCAD/EMTDCsoftware.Onthisbasis,asimulationmodeloftheZ-sourceinverterwasestablished.Subsequently,thesimulationmodelwassubjectedtobasicteststoverifyitscorrectness,andthecircuitparametersoftheinvertermodelwereoptimizedtoimproveitsworkingefficiency.Finally,thispaperintroducesthedesignschemeoftheZ-sourceinvertercontrolsystem,includingcircuitdesignbasedonSPWMcontrolandsoftwaredesign,layingafoundationforthenextstepofsimulationandexperimentalwork.【Keywords】Z-sourceinverter;PSCAD/EMTDCsimulationplatform;simulationmodel;circuitcontrolsystem