印度某MW電廠電氣作業(yè)指導(dǎo)書2

Thedieselgenerator第13頁(yè)共13頁(yè)InstructionforinstallationandtestThedieselgenerator1.Relateddocumentationsandstandards1.1.TheChinesestandard(GB50170-92):Codeforconstructionandacceptanceoftherotatingelectricmachine1.2.TheChinesestandard(GB50150-91):Standardforhand-overtestofelectricequipment1.3.TheChinesestandard(DL408-91):Operationcodeforpowerplantsafety1.4.TheChinesestandard(DL560-95):Operationcodeforelectricsafetyinhighvoltagelaboratory1.5.TheChinesestandard(DL/T5043-95):Designstandardforelectricallaboratoryofthermalpowerplant1.6.TheChinesestandard(DL/T5161.7-2002):Specificationforconstructionqualitycheckoutandevaluationofelectricequipmentinstallation2.Receiptandstorage2.1.Examinethestateofthedevicesandthematerialsreceivedtocheckthatitcorrespondswithwhatwasordered.2.2.Checkallpackagesforexternalsignsofdamage.2.3.Pleasecheckconditionandqualityofthedevicesandthematerials,andcomparethemwithapackinglist.2.4.Ifonunpacking,whichmustbecarriedoutcarefully,anydamageorirregularityisnoted,notifythiswithindefiniteperiodofreceiptofthegoods,notificationmustindicatetheshippingnotenumber.2.5.Ifthedevicesistobestoredforevenshortperiodsbeforebeingputintoservice,afteronreceiptitisadvisabletoputitbackintoitsrelativecontainerandcoveritwithawaterprooftarpaulin.Useadryanddust-freeambientforstoragewithoutanyaggressivechemicalagents.Placethedeviceandanyfixedpartonahorizontalsurfacenotindirectcontactwiththefloor,butonasuitablesupport.2.6.Selectalocationforthedeviceinaclean,dry,vibration-freeareawithmoderatetemperature.2.7.Withregardtolifting,followtheseinstructions:thedevicesmustbeplacedonasturdysurface,andpreferablyliftedusinganappropriateliftingforktruck.Theuseofropesis,however,permitted:inthiscasetheliftingropesmustbehookedfirmly.3.Installationofthegenerators3.1.Checkthestator:Statorcore,windingsandfoundationbaseshouldbecleanedandwithoutdust,greaseandforeignmatters.Windinginsulationsurfaceshouldbekeptintactwithoutanyscratchandspurring.Theendturnsandtheendringsshouldcontacttightlyeachotherandbepaddedsolidly,fixturesbecompleteandtheboltsandthenutsbetightened.Siliconsteellaminatesshouldnotbeeroded,loosenedanddamaged,andtheirventilationductsandchannelsshouldbeclearedwithoutanyobstacle.Theleadsandtheterminalboardsoftheembeddedthermometersshouldbekeptcleanandtheinsulationisingoodcondition,andthethermometersembeddedatthebranchesofthesinkpipelinesshouldbefixedfirmly.Thestatorslotclosingwedgesshouldnothaveanycrack,protrudeandloosening.Thecompressionhollownessunderwedgesshouldnotexceedonethirdofeachwholelength.Endpartsofthewedgesshouldbeseatedfirmly.3.2.Anyinspectorgettingintothestatorisprohibitedtobringanymetalarticleseasytodropoutandtostepontheendturnsdirectlyorstepwithhardsoles.3.3.Checktherotor:Balancepiecesontherotorshouldbefixedfirmly,andnotallowedtoaddorsubtractortochangeposition.Thebalancescrewsshouldbetightenedandlockedup.Inspecttheairventilationforhydrogencooledrotorwithoutanyobstacleinthegaspassage.Thefanbladesshouldbeassemblednormallywithoutbreakageandcrackontheweld,andthescrewsshouldbelockedup.3.4.Thestatorwindingandtheironcoreshouldnotbedamagedduringinsertingrotorintoit.Lowerpartsoftheironcoreandendpartsofthewindingsshouldbecoveredwiththepaperboardsorrubberpadsbeforeinserting.3.5.Contactsurfacesoftheoutletsintheterminalboxshouldbeneat,smoothandcleanandwithoutgreasyduringassemblyoftheoutlets.Thesilvercoatingshouldnotbefiled.Connectionoftheoutletsshouldbetight.Noclosedmagneticcircuitsintheterminalboxafterconnectionwithironbolts.3.6.Thebrushtailshouldbeconnectedfirmlyinperfectcontactandnottouchmovingpartsorbrushsprings.Insulationpadsshouldbekeptintact.Thebrushshouldbemovableupordownfreelyinthebrushholder.Constantpressurebrushspringsshouldbeintactwithoutanymechanicaldamage.Contactsurfacesofthebrushesshouldbecoincidentwiththearchoftheslip-rings,andareaofcontactsurfacesshouldnotbelessthan75%ofcrosssectionsforasinglebrush.Thecarbonpowdershouldbeclearedawaythoroughlyaftergrinding.Thebrushshouldberunningonwholesurfaceoftheslip-ringsandnottobeclosedtoedgesoftheslip-ringsduringoperation.3.7.Examinationofthegeneratorbodiesisasshownintable3.7.Table3.7.:ExaminationofthegeneratorbodiesExaminationitemsPropertyQualitystandardsMethodsandtoolsforexaminationExaminationofthestatorironcoresAppearanceoftheironcoresClean,withoutcorrosionanddamageTouchandinspectionBetweenlaminationsoftheironcoresWithoutloosenessandmetalshortcircuitInspectionGroovewedgesExaminationofthewedgesMainWithoutbreakandloosenessPullExamineendsofthegroovewedgesSolidCompressionhollownesslengthofeachgroovewedgeMain≤1/3ofgroovewedgelengthMeasurebyainstrumentCorrugatedplatesInaccordancewiththemanufacturespecificationCheckbyaspecialtoolorinstrumentExaminationoftheventilatedpathsMainWithoutblocksInspectionandventilationExaminationofthestatorwindingsAppearanceofinsulationlayersMainClean,withoutdamage,bubbleandcrackInspectionFastenerandbindCompleteBindoftheendwindingsTightPullAnti-loosemeasuresCompleteandreliableExaminationoftheinsulationwaterpipesIntervalsbetweentheinsulationwaterpipesandtheendcoversWithouttouchInspectionIntervalsbetweentheinsulationwaterpipesAppearanceoftheinsulationwaterpipesWithouthollowExaminationofthepipesMainUnobstructedCheckbyventilationInsulationresistancesbetweeninnerandouterpipesMain≥1MΩCheckbya1000Vmeg-ohm-meterExaminationoftherotorsIroncoresExaminationoftheventilationchannelsMainUnobstructedCheckbyventilationPaintlayersonsurfaceWithoutpeelingandcorrosionInspectionConnectionbetweenthewindingleadsandtheringcollectorsMainSolidandcontactPullandcheckthetestreportsExaminationofthebalancersMainWithoutdeformationInspectionRingcollectorsExaminationofoutersurfaceSmooth,withoutcorrosionanddamageInspectionExaminationoftheventsMainUnobstructed3.8.Qualitystandardsinstallingthegeneratoraccessoriesareasshownintable3.8.Table3.8.:InstallationofthegeneratoraccessoriesExaminationitemsPropertyQualitystandardsMethodsandtoolsforexaminationInstallationofthebrushracksandthebrushholdersExaminationoftheinsulationgasketbushingsandtheinsulationpadsWithoutdamageanddirtInspectionInsulationresistancetogroundMain≥1MΩMeasurebya2500Vmeg-ohm-meterGapsbetweenthebrushholdersandtheringcollectorsMain2mm~4mmCheckbyaruleTighteningboltsandanti-loosemeasuresCompleteandtightPullInstallationoftheelectricbrushesElectricbrushtypesandmanufacturesMainSametype,samemanufactureInspectandcheckmanufacturecertificatesConnectionoftheelectricbrushleadsSolidPullIntervalsbetweentheleadsandtheturningpartsWithouttouchInspectionGapsbetweentheelectricbrushesandthebrushholdersMain0.1mm~0.2mm,movableupanddownPullandcheckbyaclearancegageExaminationofinsulationpadsoftheelectricbrushesMainPerfectInspectionContactareasbetweentheelectricbrushesandtheringcollectorsMain≥75%ofcrosssectionofaelectricbrushInspectgrindedtrackonsurfaceSpringpressureInaccordancewiththemanufacturespecificationCheckdependonthemanufacturespecificationInstallationofthebushingsElectrictestofthebushingsMainQualifiedCheckthetestreportsVisualexaminationofthebushingsWithoutpeelingandcrackInspectionSealtestofthewatercoolingpathsMainInaccordancewiththemanufacturespecificationCheckdependonthemanufacturespecificationConnectionofflangesbetweenthebushingsandtheterminalboxesMainTightboltsandgoodsealInspectandcheckbyatorquewrenchConnectionbetweenthebushingsandtheoutletsofthegeneratorsExaminationofthecontactsurfaceCleanandperfectsilverplatedsurfaceInspectionConnectionoftheboltsMainTight,withoutclosemagneticcircuitsInspectandcheckbyatorquewrenchAnti-loosenutsCompleteandtightInspectionConnectionoftheinsulationwaterpipesSolid,goodsealWrappingtreatmentforinsulationMainInaccordancewiththemanufacturespecificationCheckdependonthemanufacturespecificationEarthConnectionoftheearthedwiresMainSolid,goodcontactPullandconductancecheckEarthofthefoundationsObviousearthattwopointsandaboveInspection3.9.Checkrecordsofthegeneratorsareasshownintable3.9.Table3.9.:CheckrecordsofthegeneratorsProjectnameGeneratortypeRatedcapacity(MW)Ratedvoltage(kV)Ratedcurrent(A)Excitingvoltage(V)Excitingcurrent(A)Speed(r/min.)Frequency(Hz)PowerfactorWiringmannerCoolmannerExcitingmannerManufactureManufacturingnumberManufacturingdateExaminationitemsResultsRemarkCleanstatorironcores,windingsandframes;tightboltsWithoutcorrosion,damageandmetalshortcircuitonthestatorironcoresWithoutcrack,teatandloosenessonthestatorgroovewedges;withoutimpurityintheventilationpathsandtheventsWithoutdamageoninsulationsurfaceofthestatorwindings;solidfastersandbindsontheendsWithouthollowanddamageonthecoolwaterpipes,withoutblockinthepipesWithoutcontactbetweencoolwaterpipesandendcovers;goodinsulationofthestatorjunctionpipesWithoutpeelandcorrosiononanti-corrosivepaintlayeroftherotorironcoresWithoutblockintheventsSolidfastersandbalancersontherotorsSmoothsurfaceoftheslidingrings,withoutcorrosionAirpressuretestforcoolwaterpipesofthestatorwindings,ventilationtestoftherotorsElectrictests,I&CtestsExaminationconclusionAcceptanceopinionSignatureDateConstructiongroupConstructionteamQualitydepartmentSupervisorydepartmentOwner3.10.Checkrecordsforoutletsconnectionandinsulationwrappingofthegeneratorsareasshownintable3.10.Table3.10.:CheckrecordsforoutletsconnectionandinsulationwrappingofthegeneratorsProjectnameGeneratortypeRatedcapacity(MW)Ratedvoltage(kV)Ratedcurrent(A)Excitingvoltage(V)Excitingcurrent(A)Speed(r/min.)Frequency(Hz)PowerfactorWiringmannerCoolmannerExcitingmannerManufactureManufacturingnumberManufacturingdateExaminationitemsResultsRemarkPerfectandcleancontactsurfacebetweenleadsandoutletsofthegeneratorsSpecificationandnumberofconnectionboltsbetweenleadsandoutletsFasteningtorqueofconnectionboltsbetweenleadsandoutlets(Nm)WithoutclosemagneticcircuitbecauseofboltconnectionOrderofinsulationwrappingmaterialsTechnologycontrolofinsulationwrappingQualityofinsulationwrappingWithstandvoltagetestafterwrappingtheoutletsExaminationconclusionAcceptanceopinionSignatureDateConstructiongroupConstructionteamQualitydepartmentSupervisorydepartment4.Testofthegenerators4.1.MeasureDCresistancesoftherotorwindings.DCresistancesoftherotorwindingsshallbemeasuredundercoldstate,duringwhich,thedifferencebetweenthetemperatureonthewindingsurfaceandthatofambientairshallnotbegreaterthan±3℃.Ascomparedwiththevaluedeliveredbythemanufacturerthedifferenceshallnotexceed2%.4.2.Measureinsulationresistanceoftherotorwindingsbya500Vmeg-ohm-meter.Insulationresistanceoftherotorwindingsshallbehigherthan1MΩ.4.3.ACvoltagewithstandtestontherotorwindingscanbereplacedbymeasurementofinsulationresistanceusinga2500Vmeg-ohm-meteralso.Testdurationis1min.4.4.Measureinsulationresistancesonexcitationcircuitsofthegeneratorsortheexciterstogetherwithallequipmentconnectedbya500Vmeg-ohm-meter.Theinsulationresistanceshallnotbelowerthan0.5MΩ.Drawoutallelectronicequipmentduringmeasurement.4.5.CarryoutACvoltagewithstandtestonexcitationcircuitsofthegeneratorsorexciterstogetherwithallequipmentconnectedexcludingtherotors.Thetestvoltageis500Vandtesttimeis1min.Drawoutallelectronicequipmentduringtest.4.6.Measureinsulationresistanceofthegeneratorbearingsbya1000Vmeg-ohm-meter.Theinsulationresistanceshallbehigherthan0.5MΩ.4.7.MeasureDCresistanceofthestatorwindings.4.7.1.DCresistanceshallbemeasuredundercoldstate.Differencebetweenwindingsurfacetemperatureandambienttemperatureshallnotbegreater±3℃whenmeasuring.4.7.2.DifferenceofDCresistancebetweeneachphaseorbranchofthewindingsshallnotexceed1.5%oftheminimumvalueaftercorrectingtheerrorintroducedbydifferentlengthofthemachinelead-outsandtherelativechangeshallnotbegreaterthan2%alsoincomparedwiththecorrespondingvaluedeliveredbythemanufacturer.4.8.Measureinsulationresistanceandabsorptionratioofthestatorwindingsbya500Vmeg-ohm-meter.4.8.1.Timeoftest:Measuringstatorwindinginsulationresistanceshallbecarriedoutduringthewatercirculating,afterthestatorcoilwatersystemwascompleted.4.8.2.Connectionforthetest4.8.3.Sequenceoftest:.Thestatorwindingshallbegroundedanddischarged..Measureandrecordairtemperatureandhumidity..Connectthelinesinaccordwiththefigure.8.3.4.Recordtimesandthevaluesoftheinsulationresistanceatthattimewhenmeasuringbya500Vmeg-ohm-meter..ThelineatHpointshallbedisconnectedafterfinalvaluewasrecorded..Thiscoilshallbedischargedthoroughbyagroundbar..Measureinsulationresistanceofotherphasewindingsasantecedentsequence.4.8.4.Safetyprecaution:Becausethestatorwindingisequivalenttoalargecapacitoragainsttheearth,itmustbedischargedthoroughaftermeasuringinsulationresistance,inordertoavoidgettinganelectricshockanduncorrectedmeasurement.4.8.5.Measurestatorwindinginsulationresistanceat15sand60sseparately.Theabsorptionratioistheratiooftheresistanceat60sto15s.4.8.6.Theunbalancefactorofinsulationresistancebetweenphasesshallnotbelargerthan2.Theabsorptionratioshallbelessthan.CarryoutDCvoltagewithstandingtestandleakingcurrentmeasurementonthestatorwindings.Theleakingcurrentshallconformtofollowingstandardsunderspecifiedtestvoltage:4.9.1.Thedifferenceofleakingcurrentsbetweenphasesshouldnotbegreaterthan50%ofthelowestvalueanditshouldnotappearsignificantchangeincomparedwiththetestvalueinthefactorywhenthegreatestleakingcurrentbelow20μA.4.9.2.Theleakingcurrentshouldnotincreaseastimegoesby.4.9.3.Cautionsshallbetakenandanalyzediftheleakingcurrentsignificantlyincreasesnotproportionallywithvoltage.Thereasonsshouldbefoundandeliminated.4.10.ACvoltagewithstandtestonthestatorwindings4.10.1.Testvoltageis1.5×415V+750V=1372.5V,anddurationis1min.4.10.2.ThecircuitforACvoltagewithstandtestonthestatorwindings:WhereVoltageregulatorisaregulatedtransformer,100kVA,380V/40~400V;V1isaACvoltagemeter,0~300~600V;A1isaACamperemeter,2.5~5A;CTisacurrenttransformer,300/5A;Tr.isahighvoltagetesttransformer,YDJ-100/50,100kVA,380V/50kV;A2isaACamperemeter,0~1A;Risaprotectiveresistor,3kΩ,P>3kW;Gisadischargecupricsphere,whichmatcheswiththetesttransformer;R0isaprotectiveresistorforthedischarginggap,30kΩ,P>15kW;PTisapotentialtransformer;V2isavoltagemeter;Dischargevoltageofthedischarginggapshallberegulatedto1.1~1.15timesofthetestvoltage.4.10.3.Sequenceoftest:.Checkthesafety.DCvoltagewithstandingtestonstatorwindingshouldbecarriedoutaccordingtothetechnicalstandards..Measuretheinsulationresistanceofthestatorwindingandtheabsorptionratioagain,andotherwindingsshouldbegroundedalltogether..Setthetripvalueoftheover-currentprotectionrelay,whichequals1.3timeofthehighvoltagecapacitancecurrent..Testinno-loadstate,setthedischargevoltageofthedischargegap,whichequals1.1~1.15timeofthetestvoltage..Connectthetestwinding,turnontheequipment,regulateandraisethevoltageoftheregulatedtransformeruniformly.Raisethevoltageto50%ofanalternatingvoltagewhoseeffectivevalueis1372.5V.Thenraiseittothetestvoltage1372.5Vin15safterthecircumstancewasnormal,whilerecordingthevoltageandthecurrents.Thetestvoltage1372.5Vwillbeappliedcontinuouslyforaperiodof1min..Dropthevoltageuniformlyatfinished,turnofftheequipmentwhenthevoltageisdownto1/3ofthetestvoltage.Thenthetestwindingsshallbegroundedanddischarged..Thevoltagewithstandingtestprocedureofotherphasewindingsasantecedent.4.10.4.Cautionoftest:.Theoperatormustbeundertutelageduringthetest..Outputofthetestequipmentmustbezeropositionbeforeturningon..Thevoltagemustbedroppedimmediately,turnedoff,anddischargedifoccuratroubleduringthetest.5.Puttingintoservice5.1.Generaldescription5.1.1Whenfinishedwiththeoriginalinstallationandallmodifications,conductacompleteoperationaltestontheentireinstallationtoverifycompliancewithapplicablestandards.Testingshouldbeconductedbyafactory-trainedtechnicianinthepresenceofarepresentativeofthemanufacturerandtheowner’srepresentative.Followproceduresoutlinedintherelatedstandard.5.1.2.Periodictestingandservicingofthesystem,alldevices,andanyotherassociatedequipmentareessentialtoensureproperandreliableoperation.Testandservicethesystemandthedeviceaccordingtotheschedulesandproceduresoutlinedinthemanufacturer’smanuals.5.1.3.Betweenformalperiodictestingandservicingintervals,therelatedoperationchecksshouldbeperformedfordefiniteperiod,orfrequentlywhenrequiredbytheowner.5.2.Measurephasesequences.Thephasesequenceofthemachineshallbeidenticalwiththatofthepowernetwork.5.3.Commissioningrecordsofthegeneratorsareasshownintable5.3.Table5.3.:CommissioningrecordsofthegeneratorsProjectnameGeneratortypeRatedcapacity(MW)Ratedvoltage(kV)Ratedcurrent(A)Excitingvoltage(V)Excitingcurrent(A)Speed(r/min.)Frequency(Hz)PowerfactorWiringmannerCoolmannerExcitingmannerManufactureManufacturingnumberManufacturingdateExaminationitemsResultsRemarkGeneratorexaminationbeforecommissioningInstallationofthedevicesinprimaryandsecondarysystemsofthegeneratorsGoodcontactbetweentheelectricbrushesandthecommutatorsorringcollectorsReliableearthofthegeneratorbodiesTest,regulationandsettingforprimaryandsecondarysystemsofthegeneratorsStaticacceptanceofthegeneratorsCompletelighting,telephoneandfirefightingdevicesGeneratorexaminationaftercommissioningFinishalltestsafterfirstcommissioningofthegeneratorsWithoutabnormalsoundindevicesProtectionNumberofdesignsNumberofoperationOperationrateInstrumentNumberofdesignsNumberofoperationOperationrateIndicationofthemetersandsignalsLoadrate(%)Complete168hfullloadcommissioningofthegeneratorsExaminationconclusionAcceptanceopinionSignatureDateConstructioncompanyCommissioningcompanySupervisorydepartmentOwner5.4.Testrecordsputtingthedieselgeneratorsintoserviceautomaticallyareasshownintable5.4.Table5.4.:TestrecordsputtingthedieselgeneratorsintoserviceautomaticallyProjectnameTypeofdieselengineStartingmannerCoolingmannerTypeofgeneratorsRatedcapacity(kW)ExcitationmannerManufactoryManufacturenumberManufacturedateTestitemsResultsRemarksExaminationbeforetestputtingthegeneratorsintoserviceautomaticallyCleannessinsidethepanelsSealofholesinthepanelsThecableplatesMarksofthesecondarywiresValiditytermsoftheinstrumentsFirefightingequipmentsindoorInsulationresistancesoftheprimarycircuitstoground(MΩ)Insulationresistancesofthesecondarycircuitstoground(MΩ)BatterycapacitiesExaminationoftestputtinggeneratorsintoserviceautomaticallyTestofstartingTestoflocalstartingandautomaticinterlocksStartingtestattestpositionoftheswitch,atopenpositionofthegeneratoroutletswitchandinnormalconditionoftheauxiliarypowersystemTestofinterlockmanualandautomaticstartingatmaintenancepositionoftheswitchandsignalingtothecontrolroomManualstoptestifautomaticandmanualrestorationoftheauxiliarypowersystemProtectionoperationfortripthemainswitchOver-currentprotectionUndervoltageprotectionDifferentialprotectionLocalsignalsEarthprotectionHightemperatureofthecoolingwaterLowpressureofthelubricationoilHighpressureofthelubricationoilOverspeedofthedieselgeneratorRemotesignalsFailureofautomaticstartingGeneralsignalofabnormalconditionGeneralsignaloffaultsTimeofautomaticstartingforthegenerator(s)Timefromstartingtoloadingofthegenerator(s)TestconclusionofautomaticputtingintoserviceAcceptanceopinionSignatureDateConstructionteamQualitydepartmentSupervisorydepartmentOwner6.Safetyprecautions6.1.Theinstallationhastobecarriedoutbyqualifiedpersonalfollowingtheinstructionofthemakers.Onlyqualified,authorizedpersonsshouldcarryoutelectricalwork.Wiringshouldbeperformedbythequalifiedpersonnelonly.6.2.Adisconnectswitchmustbeinstalledtobreakallcurrentcarryingconductors.Beforemakinganyelectricalconnectionensurethatthemainswitchisoff,