gaas聚光太阳能电池仿真与跟踪系统的分析-analysis of gaas concentrating solar cell simulation and tracking system.docx

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2018-06-04 发布于上海
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gaas聚光太阳能电池仿真与跟踪系统的分析-analysis of gaas concentrating solar cell simulation and tracking system.docx

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gaas聚光太阳能电池仿真与跟踪系统的分析-analysis of gaas concentrating solar cell simulation and tracking system

AbstractWiththedevelopmentofworldeconomy,theearthmineralresourcesareusedas massexploitationofenergy,whichmakesoil,coalandotherresourcesaredepleting,and causedhugepollutiontotheenvironment.Solarenergyisahugereserve,pollution-free renewableenergy,butitsflowdensityislow.Therefore,howtoeffectivelyusethesolar energy has become one of the important issues.ThemaincontentofthethesisincludethesimulationofGaAsconcentratorsolarcell andthedesignofopticaltrackingsystem.Researchonthephotoelectrictrackingsystemis torealizetheGaAssolarcellsconcentratorandimprovetheefficiencyofthecollectionof solar energy.ThelightabsorptionpropertiesofGaAswereanalysed,andforaparticularcell structureobtainedtheparametersofthedopingconcentrationofGaAssolarcellswere investigatiednumericallyby using theSIMUAPAYS2009 simulation program, fromwhich amorereasonableconfigurationwas acquired.By thesimulationalotof timeandcostcan besavedforthecell’spreparation.GaAssolarcellshortcircuitcurrentandtheopen circuitvoltageincreasewithlightintensity.Therefore,theconcentratingmethodcanbe usedtoimprovethecell’sefficiencyofsolarenergycollection.Inordertoconvergethe sunlightinthesolarcell,a suntrackingsystemwasdesigned.Theatmega16isthe microcontollercoreofthesystem,andelectro-opticaltrackingandsunangletrackingare twowaystotrackthesun.Electro-opticaltrackingmethodisusedinasunnydaywith four-quadrantphotodetectorwhichresponsetothelightindensity,andthedetectedlight signalsarecoverttoelectricalsignals,thentheelectricalsignalsaresentintothe microcontrollerforprocessingafterfilteringandamplifying.Then,twosteppermotors controlledbymicrocontrollertoimplementtheoperationofthesolarelevationangleand azimuth of the track. The sun angle tracking was used in cloudy weather, byconmunicatingdatawiththeDS1302clockchip,thenusethesunsaltitudeangleand azimuthtoachievecontrollingthetwosteppermotorstrackthesun.Resultsshowthat gooddesignofsolarcellstructureandusesuntrackingsystemcangreatlyimprove conversion efficiency of solar cell.Keywords: Ga