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DesignofelectricsystemofwindfarmABSTRACT:Withthevigorousdevelopmentoftheglobaleconomy,thevariouscountriestheamountofsupplyanddemandforenergyisalsogrowingsharply,butonlybythelimitedreservesoffossilresourcesisinadequatesupplyofcontinuousincreasingdemandsofeconomicdevelopment,sothedevelopmentofnewenergywillbecomethenewdirectionofglobalenergyuseandthemainway.Undertheconditionofexistingtechnologysupportintheformofafewkindsofnewenergypowergeneration,windpowerbecauseofitsenergysaving,cleanenvironmentalprotection,thedevelopmentpotentialistremendoussuchoutstandingadvantagestoobtainrapiddevelopmentbothathomeandabroad,becomeeachcountryofthehottopicsinthestudyofscientificresearchpersonnelandprofessionalandtechnicalpersonnel.Accordingtothewindpowerprojectsummary,studiedthewindfarmsintheelectricalsystemanddesign,andtheimpactontheecologicalenvironmentisestablishedforwindengineeringbenefitmodelofwindpowerengineeringofecologicalenvironment,specificworkcontentisasfollows:first,analysisofwindpowerengineeringlocalgeology,windresources;Secondly,accordingtothecurrentsituationanalysisofwindpowerproject,thedesignofelectricsystemwithinwindfarmiscompleted.Forthewindfarmelectricalparts,thefirstlevelofthewindgeneratordesignbooster,collectingcircuitwiringandconnection,step-upsubstationmainwiringandelectricalwiringschemes,suchas,andthroughthecalculationofshort-circuitcurrentselectionforamainelectricequipment;Internalelectricalsecondarypartsforwindfarms,thewindturbinedesign,changeandboosterboxsubstationmonitoringandprotectionandmeasurementandpowersystemoperation,andlightningprotectionandgroundingdesignofwindfarms.Keywords:Designscheme,Electricalprimarysystem,ElectricalsecondarysystemOne,electricalprimarysystemdesignofwindfarms:Electricalpartofthewindfarmandconventionalpowerstationisthesame,stillmainlyincludestheelectricalparta(system)andtheelectricalsecondpart(system),itselectricsystembasiccompositionmainlyincludesthewindgeneratingset,collectingsystem,boostersubstationandtheauxiliarypowersystem.1)windfarmsaccesstopowersystemschemeThewindfarmcapacityofthispaperis49.5MW,byTaiwanmono-devicecapacityof1500kw33windturbines,dependingongeographiclocationandlocalpowersystemwherewindfarms,windfarmaccesssystemschemeisasfollows:withinthewindfarmconstructionof110KVstep-upsubstation,astandingvariablevolume50MVA,new110KVoverheadlinetime,accesstolocal110KVsubstation110KVbus,step-upsubstation110KVintervalasreservedforsubsequentprojects.2)electricalwiringdesignofwindpowerunitWindturbineexportvoltageof690v,ifconnecteddirectlytothewindinthestep-upsubstation,powerlosswillincrease,andleadtoconductorcrosssection,isnotconducivetoon-siteinstallation,ordoesnotconformtothestipulationsoftheinstallation.Inordertoreducethepowerlossandeasytoinstalltheproject,itisnecessarytoraisetheoutletvoltageofthewindturbineto10kVor35kVtoconnecttotheboostersubstation.Theunitboostertransformer(i.e.,collectortransformer)isdividedintotwotypes:opentypetransformerandbox-typesubstation.Comparedwiththebox-typesubstation,thelowcostoftheopentypetransformercansaveinvestment.However,itcoversalargearea,theinstallationtakesalongtime,andtheinstallationratioofthehighandlowvoltageequipmentmustbemaintainedMorecomplex;Thebox-typesubstationhastheadvantagesofsmallarea,beautifulappearance,flexibleplacement,easytomoveandsavetime.Therefore,theunitboostertransformeradoptstheformofboxsubstation.Thewindpowerunitandtheboxchangeconnectionmodemainlyhaveonemachineonechangeandmulti-machineonechange.3）circuitandwiringdesignCollectorlinkisusedfortheimportantlinkofwindturbinestoproduceelectricity,correctandeffectivegroupingofthefanisconfiguredatthesametime,reasonableselectionoftheunitconnectionform,notonlycansaveelectricitylineconstructioncosts,butalsooptimizetheentireelectricalsystemofthemainwiringscheme.Inmostcases,accordingtothenearestprinciple,accordingtothelocationofwindpowerunits,thenumberofwindturbinesineachgroupisbasicallythesame,withmorethan3to8units.Thegroupingandconnectionmodesofwindpowerstrokeelectricunitsmainlyincludechainandring,whicharedividedintounilateralannularring,bilateralannularringandcompoundring,respectively,asshowninFIG.4.6andfigure4-7showsa,b,andc.Twoconnectionwaysofcatenarywiremostwidelyapplicationsinwindfarms,itwillbemoretyphoonselectricunitsandunitsboostervariableunitconnectedtoasetofelectricallines,makealltheunitsandinthewayofmultiplesetofwires,thiskindofconnectionmodeischaracterizedbysimplestructure,savinginvestment.Connectedtothechainform,bycontrast,theringconnectionhasacertainredundancy,canincreasethereliabilityofthecircuit,butthecostishigh,becausethiskindofconnectionrequiredcableofthespecificationsofthehighandlonglength.Intheringstructure,thehighestcostistheunilateralring,whichconnectsthecableendofeachlinetothebusline.Thesecondisthebilaterallycircularring,whichconnectsthetwoterminusofthetwolinesinthechain.Thecompoundringcostisthelowest,itistheoptimalstructureofthetwokindsofringwiring.Underthepremiseofguaranteeingthereliabilityofthesystem,consideringtheconstructioncostandotherfactors,