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中图分类号：TP332论文编号：102870413-S038学科分类号：080902硕士学位论文单相单级光伏并网微逆变器的研究与实现研究生姓名杨剑青学科、专业电子科学与技术、电路与系统研究方向电子系统设计指导教师洪峰副教授南京航空航天大学研究生院电子信息工程学院二О一二年十二月NanjingUniversityofAeronauticsandAstronauticsTheGraduateSchoolCollegeofElectronicandInformationEngineeringResearchandImplementationonSinglePhaseandSingleStageofGrid-connectedMicro-inverterAThesisinElectronicScienceandTechnologybyYangJianqingAdvisedbyAssociateProfessorHongFengSubmittedinPartialFulfillmentoftheRequirementsfortheDegreeofMasterofEngineeringDecember,2012II承诺书本人郑重声明：所呈交的学位论文，是本人在导师指导下，独立进行研究工作所取得的成果。尽我所知，除文中已经注明引用的内容外，本学位论文的研究成果不包含任何他人享有著作权的内容。对本论文所涉及的研究工作做出贡献的其他个人和集体，均已在文中以明确方式标明。本人授权南京航空航天大学可以有权保留送交论文的复印件，允许论文被查阅和借阅，可以将学位论文的全部或部分内容编入有关数据库进行检索，可以采用影印、缩印或其他复制手段保存论文。(保密的学位论文在解密后适用本承诺书)作者签名：日期：南京航空航天大学硕士学位论文i摘要由于全球能源紧缺及环境污染等问题的日益加重，光伏发电因其清洁、便利、高效、安全等优势已然成为世界各国普遍关注与重点发展的新兴产业。其中适用于分布式光伏发电的模块化微逆变器成为当下国内外研究的热点。本课题针对单相单级光伏并网发电微逆变器的拓扑及控制方案进行研究。首先，本文对单相单级光伏并网微逆变器进行整体方案设计。采用有源箝位交错并联反激变换器加工频转向桥电路作为微逆变器的电路主拓扑；采用全数字控制策略实现对全系统的闭环控制。其次，对单相单级光伏并网微逆变器进行详细的硬件设计。通过理论分析计算、器件参数定标等设计了可靠、安全、高效的硬件电路，包括主功率电路、DSC数字信号控制电路、模拟信号采样调理电路、保护电路等。本文根据设计指标要求对全数字控制方案进行了详细的设计，对闭环并网电流数字控制技术、孤岛检测技术、MPPT技术做了研究，并进行了全数字控制方案的saber软件仿真，验证了全数字控制方案的可行性与适用性。最后，制作了一台单相单级光伏并网微逆变器实验样机，测试结果表明，该微逆变器可以满足性能指标要求，具备良好的稳态性能和动态性能。关键词：光伏发电，并网，微逆变器，反激变换器，数字控制，飞思卡尔DSC单相单级光伏并网微逆变器的实现与研究iiABSTRACTDuetotheincreasingworseofglobalenergyshortageandenvironmentalpollutionproblems,photovoltaicpowergenerationhasbecomeanewindustryintheworldwhichhasbeenpaidmuchattentionbecauseofitsadvantagessuchasclean,convenience,efficiencyandsecurity.Amongthephotovoltaicpowergeneration,themodularmicro-invertercomponentwhichissuitablefordistributedpowergenerationbecomesahotspotindomesticandforeignresearch.ThistopicstudiesonthetopologyandcontrolschemeofthesinglephaseandsinglestageofGrid-connectedmicroInverter.Firstofall,inthispaper,anoverallschemeforthesinglephaseandsinglestageofGrid-connectedmicro-Inverterisdesigned.Micro-Inverterusestheactiveclampingstaggeredparallelflybackconverterwithpowerfrequencysteeringbridgecircuitasthemaintopology;UsinganentirelyDigitalControlstrategytoachievetheclosedloopcontrolofthewholesystem,andthecontrolunitisbasedonanhigh-performancedigitalsignalcontroller(DigitalSignalControl)MC56F8257launchedbyfreescale.Secondly,adetailedhardwaredesignforthesinglephaseandsinglestageofGrid-connectedmicroInverteriscarriedout..Throughthetheoreticalanalysis,calculationandthedeviceparametercalibration,areliable,safeandefficienthardwarecircuitisbuiltwhichincludesmainpowercircuit,singlechipmicrocomputercontrolcircuit,analogsignalsamplingconditioningcircuitandprotectioncircuit.Accordingtothedesignabove,adetaileddesignforfulldigitalcontrolschemeisdesigned.ComparedwithTI,FPGAplatform,freescalemicrocontrollerplatformhasmoreadvantagetodesignasetofperfectfunctionoffulldigitalcontrolscheme.Atthesametime,thesabersoftwareisusedtocomparetheanalogcontrolsimulationanddigitalcontrolsimulationverifiesthefeasibilityandapplicabilityoffullydigitalcontrolscheme.Atlast,asinglephraseandsinglestageofGrid-connectedmicro-inveterprototypewasmade.Allthetestingresultsindicatethatthisinverterhasgreatdynamicandstaticperformancewhichmeetneeds.Keywords：photovoltaicpowergeneration，Grid-connected，micro-inveter，flybackinverter，digitalcontrol，FreescaleDSC.南京航空航天大学硕士学位论文iii目录第一章绪论..........................................................................................................................................11.1能源危机与光伏发电.................................................................................................................11.1.1光伏发电的研究背景与研究意义..................................................................................11.1.2光伏产业的国内外发展概况..........................................................................................11.1.3光伏发电系统综述..........................................................................................................31.2光伏并网微逆变器技术概况.....................................................................................................61.2.1光伏并网逆变器拓扑结构研究现状..............................................................................61.2.2单相单级光伏并网微逆变器的拓扑研究与控制策略..................................................71.3本课题主要研究内容.................................................................................................................8第二章单相单级光伏并网微逆变器的总体方案设计......................................................................92.1单相单级光伏并网微逆变器的指标参数.................................................................................92.2单相单级光伏并网微逆变器的总体设计方案.........................................................................92.2.1单相单级光伏并网微逆变器的拓扑结构选择............................................................102.2.2单相单级光伏并网微逆变器的控制策略选择............................................................132.2.3单相单级光伏并网微逆变器数字信号控制器的研究................................................172.3本章小结..................................................................................................................................19第三章单相单级光伏并网微逆变器的硬件设计.............