10KW光伏并网发电关键技术研究

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1、＇密级无分类号ＴＭ６１＇ＡＮＴＥＣＨＮＯＬＯＧＸＩＩＣＡＬＵＮＩＶＥＲＳＩＴＹ硕士学位论文－‘题目：１０ＫＷ光伏并网发电关键技术研究作者：＿申臭－指导教师：陈超波教授申请学位学科：控制理论与控制工程２０１８年５月１５日最后，根据系统的技术指标以及总体控制框图，对并网逆变器中的元器件参数进行了合理的选择。设计了非隔离型三相并网逆变器硬件电路以及软件流程图。搭建实验平台，进行软硬件调试，对所研究内容进行实验验证。关键词：非隔离；最大功率点跟踪；电流控制

2、策略；直流分量；孤岛检测classicdoubleclosedloopcontrolstrategy,andthefuzzyPIRcontrollerisappliedtoadjustthegridcurrentandthefeedbackvalueofDCcomponent.Thesimulationshowsthatthegridconnectedcurrentcontrolstrategycanimprovethequalityofthegridcurrentandeffectivelysuppres

3、stheDCcomponent.Inordertoensurethesafetyofgridconnectedequipmentandnetworkmaintenancepersonnel,thegridconnectedinverterisrequiredtohaveefficientislandingdetection.First,themechanismofislandingeffectisanalyzed,andtheprincipleofpassiveandactivedetectionisint

4、roduced.Then,weimprovetheinitialdisturbance,positivefeedbackcoefficientandpositivefeedbackquantityofactivefrequencyshiftwithpositivefeedback,andproposeabidirectionalfastactivefrequencyfrequencyshiftmethod.Finally,throughthesimulationanalysis,theimprovedmet

5、hodhasasmallerdetectionblindarea,andthedetectionspeedhasbeengreatlyimproved.Finally,accordingtothesystem'stechnicalindicatorsandthegeneralcontrolblockdiagram,thecomponentsparameters,hardwarecircuitandsoftwareflowchartofgridconnectedinverteraredesigned.Thee

6、xperimentplatformissetup,thehardwareandsoftwarearedebugged,andthecontentoftheresearchisverifiedbyexperiment.KeyWords:Nonisolated；MaximumPowerPointTracking；CurrentControlStrategy；DCComponet；Islandingdetection目录1绪论............................................

7、...........................................................................................11.1光伏发电的背景及意义...................................................................................................11.2光伏发电产业的国内外现状与趋势.................................

8、..............................................21.3光伏并网逆变器关键技术研究现状...............................................................................31.3.1光伏并网逆变器结构.................................................