最風(fēng)電場運(yùn)維人員技能考試試卷〔Thelatestwindfarmmaintenancepersonnelskillstestpaper〕In2023,windfarmoperationandmaintenancepersonnelSkillsexaminationpaper(theoreticalpart)1.Fillintheblanks(30blank,0.5pointseach,15points)Thefrequencyconverterisclassifiedaccordingtothemaincircuitworkmode,whichcanbedividedintovoltagefrequencyconverterandcurrentfrequencyconverter.Thecabincanrotateintwodirections,andtherotationdirectionisdetectedbytheproximityswitch.Whenthecabinreachesitslimitinthesamedirection,thelimitswitchwillsendthesignaltothecontrolunit,andthecontrolunitwillstopquicklyandreversethecable.Thepreventivemaintenanceofthewindpowerunitsinstrictaccordancewiththemaintenancescheduleprovidedbythemanufacturerisscheduledmaintenance.4.Thefrequencyofthepowersystemoperationiscontrolledbytheactivepowerofthesystem.Thevoltageiscontrolledbythereactivepowerofthesystem.PT100sensorresistancevalueandtemperatureconversion:ontherelationshipbetweenresistancevaluefor100Ωtemperature0℃.Theworkingticketsshouldbeinduplicate,oneshouldbekeptintheworkplaceandtheothershallbeheldbytheworkpermit.Ifthewindspeedexceedsafinitevalue,suchastheaverageof5or10minutes(meanwindspeed)and5secondsaverage(gustyspeed),theworkmustbestoppedimmediately.Nomaintenanceorrepairworkshallbeperformed.Thebladeislocatedanywherebetweenthepositionoftheworkandthepositionofthepaddle.Thedatapointsmeasuredbywindelectricfieldtesttowerarelocatedattheheightofthefanhubandshouldcontainparameterssuchaswindspeed,winddirection,airtemperatureandairpressure.Increasingthetowerheightofgeneratorsetscanreducetheimpactofturbulenceintensity.TheinsulationgradeofthegeneratorofwindpowergeneratorsetsisgenerallyFgrade.Thezerosequencevoltageofthegroundfaultpointisthehighest,andthefurtherawayfromthefaultpoint,thelowerthevoltage.Thepowercurveofawindgeneratorisafunctionrelationshipofthenetpoweroutputpowerofthewindgeneratorandthewindspeedofthehubheight.Thethreeconditionsofelectricshockaresinglephaseelectricshock,two-phaseelectricshock,andvoltageshock.Thesystem,equipmentname,numberandlocationshouldbecheckedbeforethereverseoperation.Viscosityindexreflectsthecharacteristicsofoilviscositywithtemperaturechange.Afteralongtermoutageoroverhaul,thetransformershouldcheckwhetherthegroundwireisremovedbeforetheoperation,andcheckthelocationoftheswitchandtheinsulationresistance.Duringacertainperiodoftime,theactualgeneratingcapacityofwindpowerunitsistheratiooftheoreticalgeneration,whichiscalledthecapacitycoefficientofwindpowergeneratingunits.Thedcresistancetestcycleoftheportableshort-circuitgroundinglineislessthan5years,andtheoperatingfrequencyoftheoperatingrodis5years.Thebladetipspeedratioofwindwheelistheratiooftipspeedanddesignspeedofwindwheel.Thepurposeofparallelcapacitoristoimprovethepowerfactoronthepowerlineofthewindgenerator.Electricalinsulationiseasytodo,butmagneticinsulationisnoteasytodo,soitiseasytogenerateleakageinmagneticcircuit.Twokindsofshort-termpredictionandshort-termpredictionofwindpowerpredictiontimescale.Ingeneraloperation,theforceonthewindwheeloriginatesfromtheliftofairflowovertheairfoil.Becauseoftheconstantspeedofthewindwheel,ThewindspeedincreasestheAngleofattackonthebladeuntilthefinalairflowisdetachedfromthesurfaceoftheairfoil,whichiscalledstallspeed.Thenewoperatingtransformershouldbetested5times.(30questions,0.5perquestion,15points)Theinsulatingglovesshallbetestedonceayear.(x)Theinsulationresistanceincreaseswhenthetransformertemperaturerises.(x)Groundingprotectionisalsoknownaszerosequenceprotection.(fx)Thegroundingofthelightningprotectiondevicebelongstotheprotectiongrounding.(x)Windpowergenerationopportunitiesaffectgridfrequency.(x)Thedroppointisthemaximumtemperaturewhenthelubricatingoilbeginstogreaseaftertheoilisheated.(fx)Windturbinesshouldhaveatleastoneformofeffectiveandcontrolledbrakingsystem.(x)Thetransformer”sheavygasprotectionanddifferentialprotectionarebothmainprotectionandshouldbeputintooperationatthesametime.(fx)Thecontactordoesnothavethefunctionofunder-voltageprotection.(fx)ThevariationoftheAngleofattackalongthebladeisindependentoftheangularvelocityoftheimpeller.(fx)Whenthewindturbineworkssub-synchronous,therotorfeedsintothegrid,thestatorabsorbsenergyfromthegridandproducesthebrakingtorque,whichmakesthegeneratorinthestateofpowergeneration.(x)Thegroundinglineoftheprotectiongapshallbeappliedwithamulti-strandsoftcopperwire,andtheminimumsectionoftheprotectionshallnotbelessthan16mm2.(x)Theangularchangealongtheradialdirectionofthebladehasnothingtodowiththeangularvelocityoftheimpeller.(fx)Thecompletedworkticketshallbekeptforatleastthreemonths.(x)Theneutralpointoftheneutralgroundingsystemofthehigh-pressureequipmentinoperationshallberegardedastheelectrifiedbody.(fx)Whenthewindpowerinthegridreachesacertainlevel,thevoltagewillnotbeunstable.(x)Whenunloadingboltswithhydraulicwrench,adjusttomaximum.(fx)Thebladewidthandnumberofbladesaredirectlyproportionaltotherotatingspeed.(x)ThelimitswitchUSESregularopencontacts.(x)Hoistingthethirdtrunkingofthetowerwhenhoistingiscompleted,theengineroommustbehoistingimmediately.(fx)Compensatingcapacitorsintandemonlinearetocompensateforthelackofwork.(x)Inthedirectcurrentcircuit,thecapacitanceisequaltotheopening.(fx)Theexportvoltageofwindgeneratorusedatpresentismostly400Vor690V.(fx)Theoutputvoltageofthesiliconrectifyingdeviceisnotaffectedbythepowergridvoltage.(x)Whenthetransformerisempty,onlytheexcitationcurrentisflowinginonewinding.(fx)Incompleteoperationreferstoonlytwophasesrunning.(fx)Usetheisolationswitchtopull,andtheunfail-ablevoltagetransformerandarrester.(fx)Theoilinthetransformerhasanarcandcoolingeffect.(x)Theaveragepowerofawindturbineisthesameastheratedpower.(x)Workinsidethehubandjustpressthebuttontostop.(x)3.Singleoption(30questions,0.5perquestion,15points)ThetoleranceofcapacitorisproportionaltoD.A,voltageB,currentC,reactanceD,frequencyIntheequipmentrating,Dequipmentiscollectivelyreferredtoasintactequipment.A,classB,classC,classD,one,twoThemaximuminstantaneouswindspeediscalledC.A,windspeedB,maximumwindspeedC,maximumwindspeedD,averagewindspeedThenewlyinvestedelectricalequipmentmusthavetheCexperimentreportbeforeitisputintooperation.A,safetyB,targetedC,handoverD,preventiveThefollowingstatementabouttheautomaticinputdeviceforsparepowersupplydeviceisD.A,theautomaticinputdeviceshallensurethatonlyoneactionisrequired;B.Thebackuppowerorequipmentshallbeputintoplaceafterthepowersupplyorequipmentisdisconnected.C,thevoltageontheworkingpowerortheequipment,andtheautomaticinputdeviceshallbeinmotionwheneverthecausedisappears.D,whethertheworkingpowerorequipmentdisconnects,canbeputintostandbypowersupplyorequipment.Aistheprimarytargetoflightningstrike.A,blade;B.Engineroom;C,wheelhub;D,anemometer.TheaccuracygradeofthetransformerisgenerallyrelatedtoA.A,voltageratioerrorBphaseAngleerrorCratioerrorDsecondaryimpedanceTherangeofprotectionfromprotectionisB.A.Thetotallengthoftheprotectedlineis20%to50%;B.80%to85%ofthetotalprotectionline;C,thelengthoftheprotectedline;D,halfoftheprotectedline.VoltageAofthegroundingphasewhenAsingle-phasegroundingoccursinAsmallcurrentgroundingsystem.A,lower;B,unchanged;C.DequalszeroInstalltheM36boltcorrespondingtotheopeningwrenchsizeofC.A,45mmB50mmC55mmD60mmAfterthegeneratorlosesmagnetism,unitspeedA.A,raiseB,lowerC,constantD,noneoftheaboveInthepowersystem,thedevicethattransformslargecurrentintosmallcurrentiscalledD.A.transformer;B.Reactor;C.Voltagetransformer;D,currenttransformer.TheamountofenergyabsorbedbywindturbinesdependslargelyonchangesinairB.A.density;B,velocity;C.Humidity;D.Temperature.ThehighestdcvoltageinawindgeneratorisC.A,5VB,12VC,24VD,36VThelubricationoilofwindturbinegeneratorbearingsshouldhavegoodD.A.liquidity;B.Lowtemperatureperformance;C.Viscosity;D.Hightemperatureperformance.Ingeneral,humanresistancecanbeconsideredbyB.A:50~100Ω B:800~1000Ω C:100~500kΩ D:1~5MΩNewlyinstalledtransformer,whosegasprotectioncanbeputintothetrippingafterthetransformerhasnoproblem.A,4h;B,12h;C,24h;D,48h.ThesliprateofdoublefeedasynchronousgeneratorS(ofwhichnsissynchronousspeed,nisgeneratorrotorspeed)isA.A,;B,;C,;D,.Oil-immersedair-cooledtransformer,whenallthefanfails,onlytheBwithitsratedcapacity.A60%B70%C80%D90%SF6gasisthegasofCA,colorlesstoxicB,non-toxicC,colorlessnon-toxicD,colortoxicTheneutralCentralLineshallbedefinedasB.A,red;B,black;C.yellowandgreen;D,whitebrown.22.Connectthebulbwithratedvoltage220Vto110Vpower,thebulbpowerisoriginalB.A,1/2;B,aquarter;C,1/8;D.Constant.23.Thechartbelowshowsthewindrosechartofadayinawindfield,andthedominantwinddirectionoftheskyisC.A,southeastwindB,northeastwindC,southwestwindD,northwestwindInordertomeettherequirementsofthesecondaryvoltage,thelargeandmediumtransformerisequippedwithAvoltageadjustingtapunit,whichisinstalledinthetransformer.A,highpressuresideB,lowpressuresideC,high,low-lowsideD,secondarycontrolloopElectricalinstrumentsforgeneraltransmissionlinesshallhaveB.A,current,voltmeterB,current,powertableC,voltage,powertableD,voltage,phasesequencetableThesystemthatreceiveswindturbinesorotherenvironmentalinformationandadjuststhewindturbinetokeepitwithintherangeofworkrequirementsiscalledC.A.Fixedpitchsystem;B.Protectionsystem;C.Controlsystem;D.Hydraulicsystem.TheshortcircuitvoltageoftransformerisequaltoD.A,shortcircuitcurrentnominalvalueB,shortcircuitlossC,no-loadlossD,shortcircuitimpedanceThepowerPabsorbedbythewindwheelfromthewindisP(whereCPisthewindenergyutilizationrate,Aissweeparea,forairdensity,viswindspeed,Risthewindsweptarea)A.A,;B,;C,;D,.ThemeasurementrangeofwindsensorshouldbeinC.A,0~40m/s;B,0~50m/s;C,0~60m/s;D,0~80m/s.Intheoperationofthegenerator,thenegativeelectrodeoftheexcitationcircuitisindicatedbythenegativeelectrodeindicatingA.A,higherB,lowerC,zeroD,nochange4.Multipleoptions(30questions,0.5perquestion,15points)ThreesolidandtwobasesareABCFG.A,theimportanceofreality;B.C.fruit.D,dothemostbasicwork;E,practicethemostbasickungfu.F,dothemostbasicwork;G,themostbasickungfu.Withrespecttofanhoisting,ABCisusuallyrequiredforwindspeed.A.Whentheaveragewindspeedisgreaterthan12m/s,theliftingofthecylindershallbeprohibitedWhentheaveragewindspeedismorethan10meterspersecond,thetopofthedryersandthecabinareprohibitedWhentheaveragewindspeedismorethan8m/sorgustswindspeedofmorethan10m/s,fanwindwheelliftingshallbeprohibitedD.Whentheaveragewindspeedisgreaterthan10meterspersecond,anyliftingworkshallbeprohibitedSecurityliabilityACDofthepersonwhoissuedtheworkticket.A,worksafetyandnecessity;B.Whetherthestaffchangesareappropriate;C.Whetherthesecuritymeasuresontheworkticketsarecorrectandcomplete;D,thestaffoftheassignedworkandthestaffareadequateandadequate.ThefollowingABCDmovingpartsareindangerofbeinginvolvedinpartsofthebody.A,airwheelandgearboxconnection;B,couplingandbrakeC,bladevariableoardriver;D,yawdrive5.TheconditionsforspecialinspectionofequipmentincludeABD.A,aftertheaccident,B,hightemperature,aftersnowandiceC,cloudydayD,peakloadThefollowingwordsarecorrect:ABC.A,windspeed;B,totalpower(totalpower)C,gearbox(gearbox);D,mainshaft(mainframe)TheprotectionfunctionofwindpowergeneratingsethasABD.A,overcurrentprotectionB,windprotectionC,smallwindprotectionD,overspeedprotectionThecompositionofthefanyawsystemiscorrect:ACD.A,yawringB,yawbatteryC,yawdrivingdeviceD,yawcounterWithrespecttolowvoltagetravel,thefollowingdescriptioniscorrect:ABCD.Thewindpowerplantmustbeoperatedcontinuouslywhenthevoltagesidevoltageofthemaintransformerisnotlessthan90%oftheratedvoltage.Itisrequiredtoensurethatthewindpowerunitcanoperate625mswithoutdisconnectionwhenthevoltagedropsto20%C.Thewindpowerunitcanguaranteethecontinuousoperationofthewindpowerunitwhenthevoltageofthenodecanberestoredto90%oftheratedvoltage.D.TheabbreviationoflowvoltagecrossingisLVT.ThecommonfailureofgearboxisABD.A,gluingB,toothsurfacedamageC,couplingfractureD,bearingdamageThecableinthefollowingpictureisnotproperlysealedforAD.AandB:C,D:Theprincipletobefollowedwhenconductingelectricityinspectionofmulti-layerpowerlineserectedwiththepoletowerisABC.A,priorlowpressure,posteriorhighpressureB,priorlowerlayer,posteriorupperlayerC,priortothenear,posteriori,posteriortotheleft,posteriortotherightTheABCmeasuresshouldbeadoptedinordertopreventthemisapplicationofpowerlinesintheerectionofmultiplecircuitsinthesamepoletower.A,eachbasetowershallhaveidentificationmark(colorstandard,discriminantsign,etc.)anddoublename;B.Theidentificationmarkofthecorrespondinglineshallbeissuedbeforework.C.Aftercheckingtheidentificationmarkanddoublenameofthepowerfailurecircuit,theworkingpersoncanstartworkaftertheinspectionlineisoutofpowerandthegroundinglineishung.D,logtowerandworkonthetower,donotuseeachbasepoletowertosetspecialpersonmonitoring.OneofthefollowingABCsituationsintheliveoperationshallbediscontinuedandshallnotbestronglysent.A,thesystemofeffectivegroundingofneutralpointmaycausesingle-phaseearthingoperation;B.Thereisapossibilityofinterphaseshortcircuitoperationinthesystemwithnon-effectivegrounding;C,theworkofficerorthepersonwhoisinchargeoftheworkisdeemedtoneedtodisablethereclosingoperation.D.ThedutydispatcherbelievesthattheoperationofthereclosingisrequiredThefancontrolsignalbelongstoanalogsignalincludingBCD.A,speedB,temperatureC,currentD,voltageBeforethefanparallelnetwork,thecommissioningprojectusuallyincludesAB.A,checkthemainswitchsettingvalue,setthecontrollerparameterB,checkthebrakesystempressure,andadjustthebrakeclearanceC,emergencyescapetestD,gearoilsampledetectionThelubricationpointswithinthefanincludeAC.A,yawgearringB,cablejointC,bladebearingD,fiberjointItisABDthatthefollowingstatementsarecorrect.A,thecorrespondingvoltagegradeandqualifiedcontactelectroscopeshallbeusedB.ThetestshouldbeconductedontheelectricalequipmentbeforetheinspectionC,rainandsnowweatherisnotallowedtodooutdoordirectinspectionTheelectricalequipmentofD,330KVandabovecanbeelectrocheckedbyindirectmethodABCDunderliftingiscorrect.Whentheweightisliftedofftheground,theheadoftheworkshouldcheckthestressedpartsandthehoistedobjects,whichcanbeformallyhoistedafternoabnormality.Liftingheavyweightmustnotbepassedfromtheheadofthehead,anditisstrictlyforbiddentostandunderthearm.Intheprocessofhoistingandtraction,thelowerpartofthestressedwirerope,upperandlower,innersideandliftingobjectsshallbestrictlyforbiddentostayandpassD,liftingobjectsshouldbefastened.Iftherearecornersorspecialsmoothparts,theyshouldbecoveredinthecontactareaoftherope.WorkonthepowerlineshouldbedonebyABC.A,fillinthefirstworkingticketofpowerlineB,andfillintheworkingticketsofelectricpowerlineC,oralortelephonecommands.D,thesecondworkingticketofthesubstationThemethodsofreactivecompensationincludeABD.A,powercapacitorsandothercapacitygroupsautomaticcompensation;B,fixedcompensationandpacketautomaticcompensation;C.Staticandreactivecompensationforresistance;D,SVCstaticreactivecompensation.Inthefollowingequipment,oneoftheequipmentbelongstoAD.A,isolationswitchB,relayC,operationpowerD,circuitbreaker.23.Thetechnicalspecificationforelectricworktickets(powergenerationandpowerconversion)shallcarryoutthepolicyof“safetyfirstandpreventionfirst“,andfollowtheprinciplesoftheworkofADE.A,protectthepersonB,protectthepowersupplyC,theelectricapplianceD,theequipmentE,theelectricitynetwork24.TheworkofthefirstworkingticketincludesABC.A,workonApole(tower)partofApowerfailurelineinAlineorwithonApowerfailure.AWorkonpowerdistributionequipmentinfullorpartialpowerfailure.Theworkofpowerpowercablewithoutpower.Workonalivelinetower.Whenmaintenanceoftheunit,thestaffmustbeequippedwithABCEF.A,seatbeltB,anti-crashlockC,safetyhelmetD,kitE,safetyropeF,positioningropeUnderthethreekindsofpeople,ABiscorrect.AworkingticketissuedbyApersonmaynotconcurrentlyberesponsibleforthework.B,thejobmanagercanfillintheworkticket.C.Joblicensormayconcurrentlyberesponsibleforthework.D.TheworkingpersonmayconcurrentlyworkasalicenseeMembersoftheworkclassshouldspecifyABCD.A,jobcontentB,workflowC,securitymeasuresD,dangerouspointsinworkBeforeworkingonthetower,checkwhethertheABCissolidA,rootB,basicC,cableD,seatbeltThecompositionofthehydraulicsystemhasABCD.A,poweroriginalB,executivecomponentC,controlcomponentD,auxiliaryoriginal30.ThebasicstepsofcardiopulmonaryresuscitationincludeBCD.A,emergencydressingB,artificialrespirationC,chestexternalheartpressureD,ventilationFive,asimpleanswer(6questions,5pointsperquestion,30points)Whatsensorsareusedinwindturbine?(atleast6)Answer:speedsensor,temperaturesensor,pressuresensor,yawcounter,oillevelsensor,windvane,anemometer,vibrationsensor,etc.Whatarethefactorsthattriggerthesafetychain?Answer:(1)emergencystopbutton;(2)speedcontrolsensor;(3)vibrationsensor;(4)bladeworkingpositionswitch;(5)brakepositionsignal.Whatisthefunctionofthearcsuppressioncoil?Answer:theactionofthearcsuppressioncoilismainlytocompensatethecapacitorcurrentofthesystem,maketheplacecurrentcompensatetothesmallernumber,preventthearcshortcircuit,ensurethesafepowersupply.Italsoreducesarcgapvoltagerecoveryspeed,improvesarcgapinsulationstrengthandpreventsintermittentgroundingovervoltage.Whatprinciples,ideasandprinciplesmustbeadheredtointhemaintenanceofwindpower?A:windfarmsinmaintenancemustadheretotheprincipleofpreventionfirst,planning,maintenance,alwaysupholdthequalityfirstidea,implementationshouldbeacompulsory,compulsorygoodprinciple,equipmentisalwaysingoodworkingcondition.Brieflydescribethethermalstandbystatus,coldstandbystatusandmaintenancestatusoftheelectricalequipment.Answer:(1)thecircuitbreakerofthepowersupplydeviceisinadisconnectingposition,buttheisolationswitchisintheclosingposition.Whenthepowersupplyisswitchedon,itbecomesahotstandbystate.thedeviceitselfisnotabnormal,butalltheisolationswitchesandcircuitbreakersareindisconnectionwaitingforthecommandclosing,whichbecomesacoldstandbystate.eq