外文翻譯--PLC 控制器在風電機組中的應用.doc

PLCControllerofWindTurbine1IntroductionWindenergyasaninexhaustible,cleanandpollution-freerenewableenergy,itsexploitationhasbeenwidespreadattentionaroundtheworld,asoneofthewindresource-richcountries,thelevelofChinaswindpowerhasmadetherapiddevelopment.Fromthe20thcentury70s,andnetwork-basedwindpowerhasbeengraduallybegantocommercializetechnologiesbecomemoresophisticated,increasingunitcapacity,whilethestallinductionwindturbinewindfarmhasbecomethemainmodel.Asthemainformofcollectingwindenergy,windturbinecontrolproblemofgrowingimportance.Atpresent,runonwindturbinecontrol,PLCcontrolhasbeenwidelyusedathomeandabroad.Inrecentyears,PLCwithitsmanyfeatureswidelyusedinadvancedindustrialcountrieshavebecomethestandardindustrialcontrolequipment.Itisdesignedspecificallyforindustrialcontrol,setelectrical,instrumentation,controlthree-inoneistoachieveanidealcontrolofmechatronicsequipment.PLCcanbeprogrammedusingthememory,inadditiontotheimplementationoflogicaloperations,orderofoperations,timing,countingandarithmeticoperationssuchasinstruction,butalsotocompletetheorderortimingofvariousclosed-loopcontrolfunctions.Throughvariouscommunicationinterfacesandmoduleprocessing,todigitaloranaloginputandoutputforeasyconnectionatalllevels,small,anti-interferenceability,highreliability,goodstabilityinlonghoursunderharshenvironment,notintermittentoperation,andprogrammingissimple,easytomaintain.Inthispaper,S7-300PLCsystemandnetwork-basedasynchronousstallwindturbineapplicationaredescribed.2AfancontroldeviceFanControlisthesafeandreliableoperationofwindturbinesakeytechnology,controldevicesandthewindturbineiscloselyrelatedtotheremainingparts,awindturbinetorunthebrain,normalandreliableoperationoftheentireunit,andareliableguaranteeforoptimaloperation1.FancontrolsystemstructureshowninFigure1,includingcentralcontrol,softandnetworkcontrolsystem,reactivepowercompensationcontrolsystemandtheyawcontrolsystem2.2.1FanControlSystemHardwareDesignMostwindturbineworksinhigh,cold,humidity,sandandotherharshnaturalenvironmentandstrongelectromagneticinterferenceenvironment,andunattended,requiringthattheirmaincontrollerinterferencecapability,highreliabilityandtheworkofvariousoperatingparametersaccuratemeasurement,controlstrategyarereasonable,timelyandaccurateprocessingFaults.Byanalyzingtherequirementsandcharacteristicsofthecontrolunit,moresequentialcontrol,thecontrolsystemtohandletheinputandoutputsignalsaremostlyswitchingsignal,sousePLCasthemastercontrollertomeetitswindturbinecontrolsystems.Requirementstomeasurewindturbineneeds,selectSiemensS7-300typePLCmoduleandnetworkasastall-typecenterofasynchronouswindturbinecontroller.Windturbinecontrolsystemhardwarecomponentincludesthemaincontrolcabinet(Mainpanel),thecomputercabinet(Computerpanel),capacitorcabinets(Phasecompensation),atthetopofcontrolcabinet(Topbox),sensors,actuatorsandcontrolcables.Inthe750kWwindturbine,thetowercabincabinetPLCmoduleincludesdigitalinputmoduleSM321,analoginputmoduleSM331,high-speedcountingmoduleFM350,interfacemoduleIM153(ET200series),etc.；towerbottomPLCmodulecontrolcabinetincludesCPUmoduleCPU-315,digitalinputmoduleSM321,digitaloutputmoduleSM322,communicationsprocessors,CP340,powersupplymodulePS307so.2.2FanControlSystemDesignSoftwareCombiningthecharacteristicsofPLCsystems,machinecontrolsystemusingtheSTEP7onthepreparationoffancontrolapplications,withstatementstablesandladdercombinationofmethodstoachievetheapplicationofmodular,structuredprogramming.Ismoreconvenientandsafeforwindturbinecontrol,lookoutturbinecontrolfunctionstobeachievedisdividedintoseveralrelativelyindependenttasks,inaccordancewiththemodularprogrammingsoftwareprogramming,themainprogramwascompletedforwindturbinegeneratorsstart,softandnetsizeofthemotorswitchcontrolandpowergenerationsystemoptimization；subroutinesinclude:shutdownsubroutine,emergencyshutdownsubroutine,yawsubroutine,JieLansubroutine,KaiPstopcontrolgearpumps,hydraulicpumpsKaiPstopcontrol,andgearoilssuchasheatingandcoolingroutine.Beforethestartofthemainswitchclosing,windturbinecontrollerisnowpreparedtorun.First,systeminitialization,controlprograminitialization,checkthestatusofmicro-controllerhardwareandperipheralsareintact,detectionsystemparameters(temperature,hydraulicoil,pressure,winddirection,windspeed,etc.),comparethedetectedoperatingparameters,withoutfailure,thesystemcanformallystart.Start,firstcheckthenetworktodetecttheparametersofthegrid,setallcounters,outputoftheinitialworkofstateinstitutionsandtheopeningangleofthyristors3,afterthewindturbinestartautomatically.Windwheelangularleafrecoverybythe90of0,thewindbegantoturnround,thecomputerbegantoreal-timemonitoringofvariousparameters,withtheincreaseinwindspeedround,windroundthefeedbackspeedsignalasinputtojudgetheconditions,intothecontrollertodeterminewhetherthegrid.Whenthepowersystemoperation,thesystemusedtodeterminetheparametersoftestparametershasexceededthelimit,theimplementationofyaw,phasecompensation,safetybrake.3ConclusionCombinationofwindpowercontrolrequirementstoS7-300-PLCmodule,forexample,onthe750kWwindturbinecontrolsystemwasoutlinedtostudythecompositionofitscontrolsystemandfancontrolprocess,thepaperdesignofPLCcontrolsystems,testFansoftheactualcontrolandoperationofwindturbinecanachievegoodcontrol.PLC控制器在風電機組中的應用1引言風能作為一種取之不盡、清潔無污染的可再生能源,其開發(fā)利用已經受到了世界各國的普遍重視,作為風力資源豐富的國家之一,我國的風力發(fā)電水平也取得了較快的發(fā)展。從20世紀70年代開始,并網型風力發(fā)電己經逐漸開始商業(yè)化,技術也日益成熟,單機容量越來越大,而失速型異步風電機已成為國內風電場的主要機型。作為采集風能的主要形式,風電機組的控制問題研究變得越來越重要。目前,在風電機組控制運行上,PLC控制已被國內外普遍采用。在最近幾年,PLC以其諸多特點獲得廣泛的使用,在工業(yè)先進國家已成為工業(yè)控制的標準設備。它專為工業(yè)控制而設計,集電氣、儀表、控制三電于一體,是實現(xiàn)機電一體化的理想控制設備。PLC采用可以編制程序的存儲器,除了可以執(zhí)行邏輯運算、順序運算、計時、計數和算術運算等操作的指令,還可以完成各種順序或定時的閉環(huán)控制功能。通過各類通訊接口與模塊處理,