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32220112:2009-12-04,,1985,;PLCDesignoftheDual2axisServoSolarEnergyTrackingSystem(,210009):,PLC,,,,,,:PLC:TP275:AAbstract:Inordertofullyutilizesolarenergywithhighefficiency,thedual2axisservosolartrackingsystembasedonPLChasbeendesigned.Byadoptingsunmotiontrajectorytrackingstrategy,thepositionofthesunindaytimeiscalculatedbycontrollerinaccordancewithrelatedformulaandparameters,thenthealtitudeandazimuthareconvertedintocorrespondingpulsestobesendedtoservodriver;andtheservomotortracksthesuninrealtime.Therefore,thesolarenergypanelisalwaystiltingtowardsthesunwhenthesystemtracksthesunfromeasttowest,thusmaximumsolarenergyisobtained.Thetheoreticalanalysisindicatesthatbyadoptingthistrackingtechnology,theefficiencyofreceivingsolarenergycanbeincreased.Keywords:MotiontrajectorytrackingSolarenergyTrackingsystemPLCServomotor0,,,,,,37.4%,,[1]11.1(),,[2],,,,[3];,,(),,,,,,,300600MW,1.2,PLC,,94,©1994-2011ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(0s90)[4],:sins=sin;sin+cos;coscos(1)=23.45sin360365(284+n)(2):,;;,=0,=23.5,=-23.5;,;n1,11,n=1,,n=n+1s[4],:coss=sinssin;-sincosscos;(3)(1)(3),(,t),(,t0),,,,,e[5]:e=0.0172+0.4281cos-7.3515sin-3.3495cos2-9.3619sin2(4)=360365(n-1)(5)t0=t+(longitude-120)/15+e/60(6):longitude,120;t24h1,151h;,=0,0,0,,:=15(12-t0)(7),(3)s=0;,s0;,s0,,12,s=0,,(1):=arccos(-tan;tan)(8)(0,0),:1=arccos(-tan;tan)(9)2=-arccos(-tan;tan)(10),(7)T1T2,:T1=12-1/15(11)T2=12+2/15(12)1.3PLCPLC[6]CP1H2XPLC,CX2Programmer,,,CP1H,PLC,1.4,13m/s,,,,5min,[7],1.5PLC,,,,:PLC,;,,,05,©1994-2011ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.[8]11Fig.1Structureofthetrackingsystem,,;,,;,,,,(-25+55),,;,,;;2,,,,XY,,,,,22Fig.2Programflowchartofthetrackingcontrolsystem,,PLC,,,33Fig.3Interruptingsubroutineofthestrongwind3,PLC,;,(55)15,©1994-2011ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.:,;,,,,;,[1]ZieglerJG,NicholsNB.Optimumsettingsforautomaticcontrollers[J].JournalofDynamicSystems,MeasurementandControl,1993,115(28):220-223.[2],,.Micro2D[J].,2007,28(1):1-6.[3].[M].:,2002:165-188.[4],,.[J].,2007(2):10-13.[5],,.[J].,2004,32(1):4-6.[6],.[J].,2001,16(5):518-521.[7].PID[M].:,2003:160-183.[8],,,.[J].,2009,25(16):145-147.[9],.[M].:,2000:10-32.[10].[D].:,2004.(51),,[9],,[1]AbdallahS,NijmehS.TwoaxessuntrackingsystemwithPLCcon2trol[J].EnergyConversionandManagement,2004,45(11-12):1931-1939.[2]SefaI,DemirtasM,ColakI.Applicationofone2axissuntrackingsystem[J].EnergyConversionandManagement,2009,50(11):2709-2718.[3]RothP,GeorgievA,BoudinovH.Designandconstructionofasystemforsuntracking[J].RenewableEnergy,2004,29(3):393-402.[4],.[M].:,2009:6-8.[5]ShenChao,HeYaling,LiuYinwen,etal.ModellingandsimulationofsolarradiationdataprocessingwithSimulink[J].SimulationModel2lingPracticeandTheory,2008,16(7):721-735.[6],.PLC[M].:,2007:10.[7],,,.[J].,2007,25(6):69-72.[8],,,.[J].,2009(8):100-103.[9],.[J].,2009(4):136-137.55,©1994-2011ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.