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1、光伏微电源的建模与仿真摘要微电网是为整合分布式发电的优势,削弱分布式发电对电网的冲击和负面影响而提出的一种新的分布式能源组织方式和结构。它通过整合分布式发电单元与配电网,在一个局部区域内直接将分布式发电单元、电力网络和终端用户联系在一起,可以方便地进行结构和配置的优化。结合冷热电联供方案,能够提高能源利用效率,减轻能源动力系统对环境的影响,推动分布式电源上网,促进社会向绿色、环保、节能方向发展。无疑,微电网运行将成为未来大型电网的有力补充和有效支撑,是未来电力系统的发展趋势之一。从能源供应的诸多因素考虑,太阳能无疑是符合可持续发展战略的
2、理想绿色能源。全球能源专家们认定,太阳能将成为本世纪最重要的能源之一。光伏并网逆变器按照拓扑结构可分为单级式和双级式两大类,本文采用双级式光伏发电作为微电源模型进行仿真分析。光伏发电系统中,要提高整体效率,一个重要的途径是实时调整光伏阵列模块工作点,使之始终工作在最大功率点附近,即最大功率点跟踪。最大功率点跟踪的方法有很多种,但应用最广泛的是扰动观察法和电导增量法,本文对扰动观察法做了详细分析,给出了算法设计,并建立了光伏电池仿真模型对算法结果进行了仿真,验证了算法的正确性。关键词 太阳能;光伏发电;光伏并网逆变器;光伏阵列模块;最大功
3、率点跟随ModelingandSimulationofmicropowerPVAbstractMicrogridisproposedneworganizationandstructureofthedistributedenergytointegratetheadvantagesofdistributedgeneration,reducetheimpactofdistributedgenerationonthegridandnegativeimpact.Itisthroughtheintegrationofdistributedgener
4、ationunitsandtherelationgshipbetweenthedistributednetwork,directlytomakethedistributedpowergenerationunits,powernetworkandendusertogetherinalocalarea.Itcanoptimizedthestructure,andconfigurationeasily.CombinedwithCCPHprogram,itcanimproveenergyefficiency,reducetheimpactofe
5、nergypowersystemsontheenvironment,promotethedistributedpowerline,improverelabilityandtopromotesocialtodevelepmenttothegreen,environmentalprotection,energysaving.Undoubtely,themicrogridwillbethenextlargegrid'scomplementsandeffectivesupport,andthefuturetrendofpowersystem.F
6、romenergysupplyofmanyfactorstoconsider,Solarenergyisundoubtedlymeetthesustainabledevelopmentstrategyofidealgreenenergy。Globalenergyexpertsthat,thesolarenergywillbecomethemostimportantoneoftheenergy。Photovoltaic(pv)gridinverteraccordingtothetopologystructurecanbedividedin
7、tothesingleleveltypeanddoublelevelsoftwokindsbig,Iwanttoadoptdoublelevelsofphotovoltaicpowergenerationasthepowersourcemodelsimulationanalysis.Photovoltaicpowergenerationsystems,toimprovetheoverallefficiency,aimportantwayisthereal-timeadjustmentphotovoltaicarraymoduleused
8、toalwaysworkinginthemaximumpowerpointnear,namelythemaximumpowerpointtracking(MPPT).Therearemanymethodsf