成果講稿分析

SHANGHAITURBINEWORKSThisdocumentcontainsproprietaryinformationownedbyShanghaiElectricPowerGenerationEquipmentCo,.Ltd.ShanghaiTurbineWorks.Usethisdocumentsolelyforthepurposegiven.Donotreproduce,discloseoruseotherwisewithoutwrittenconsentofShanghaiElectricPowerGenerationEquipmentCo,.Ltd.ShanghaiTurbineWorks.GFEDCBADraftedReviewedApprovedModifications-FANGCHENGGANGNUCLEARPOWERPLANTPHASEI(2×1000MW) X TURBINEGOVERNINGSYSTEM(GRE)SYSTEMDESIGNMANUALA√SHANGHAITURBINEWORKSThisdocumentcontainsproprietaryinformationownedbyShanghaiElectricPowerGenerationEquipmentCo,.Ltd.ShanghaiTurbineWorks.Usethisdocumentsolelyforthepurposegiven.Donotreproduce,discloseoruseotherwisewithoutwrittenconsentofShanghaiElectricPowerGenerationEquipmentCo,.Ltd.ShanghaiTurbineWorks.GFEDCBADraftedReviewedApprovedModifications-FANGCHENGGANGNUCLEARPOWERPLANTPHASEI(2×1000MW) X TURBINEGOVERNINGSYSTEM(GRE)SYSTEMDESIGNMANUALA√BC編制部門 自控中 編許洪偉校黃海躍編制部門 自控中 編許洪偉校黃海躍審_黃海躍審_劉曉強標準化審查 會簽 批準 DocumentCHAPTER5–OPERATINGNormalOperatingNormaloperationforDocumentCHAPTER5–OPERATINGNormalOperatingNormaloperationforthegoverningsystemconsistsofrunningwiththeturbinegeneratoronloadandsynchronizedtothehighvoltagegrid.Thecharacteristicsoftheturbinecontrolsystemresponsetovariationingridfrequencydependonthedroopwhichisset,bothinthebaselevelspeedloopandalsointheloadloopfrequencycompensationThesteamturbinecontrollerisalwaysinservice.Allsensors,actuatorsandexternalsignalsareconnectedtotheturbinecontrolsystemandfreeoffaults.Allautomationprocessorsareloadedwiththerespectiveapplicationsoftware.Allcomponentsofthesystemareworkingwithoutfaults.Allpowersuppliesareavailable.Dependingontheactualstatusoftheturbinegeneratorplantthefollowingoperationsmodesofthesteamturbinecontrollerareactive:TurbineisshutThesteamturbinecontrollerisinTurbineisinstart-uporloadDependingonoperationalconditionoftheplant,theactivespeed/loadandpressurecontrollerinthesteamturbinecontrollertrackstherespectiveprocessvaluetothecorrespondingtargetset-point.Thecontrolvalvesaredesignedfor103%massflowwhenallvalvesareopen(VWO)at100%valvespindlestroke.Innormalsystemoperation,thestopvalveisfullyopenedandthecontrolvalveisDate ShanghaiElectricPowerGenerationEquipmentCo.Ltd.TURBINEGOVERNINGSYSTEM(GRE)ChapterSheet1ofDocumentthrottledatcontrolvalvespindlestrokelessthanthemaximumstroke.Thesteammassflowiscontrolledbyshiftingthecontrolvalveconeasrequiredbytheturbinecontroller.InnormalturbineoperationthesolenoidDocumentthrottledatcontrolvalvespindlestrokelessthanthemaximumstroke.Thesteammassflowiscontrolledbyshiftingthecontrolvalveconeasrequiredbytheturbinecontroller.Innormalturbineoperationthesolenoidvalves(ECS:GSE01/02/03/0423EL/24EL;KKS:MAA12/22/32/42/AA013/AA014)mustbeenergized.Whenthesolenoidvalvesareenergized,theconnectedhydrauliccartridgevalvesECS:GSE01/02/03/0434/36VH;KKS:MAA12/22/32/42AA024/AA026andECS:GSE01/02/03/0433/35VH;KKS:MAA12/22/32/42AA023/AA025areIncaseofaturbinetriptheservovalve(ECS:GRE01/02/03/0422EL;KKS:MAA12/22/32/42AA012)andbothsolenoidvalves(ECS:GSE01/02/03/0423EL/24EL;KKS:MAA12/22/32/42AA013/AA014)mustbede-energized.De-energizingofoneorbothsolenoidvalvesleadstoopeningoftheadjacenthydrauliccartridgevalves(ECS:GSE01/02/03/0433VH/34VH/35VH36VH;KKS:MAA12/22/32/42AA023/AA024/AA025/AA026)andsubsequenttofastclosingoftheMSValvebyspringforce.Incaseofaturbinetrip,theLPcontrolvalveistrippedviathesolenoidvalves.De-energizingofoneorbothofthesolenoidvalvesleadstoopentheadjacenthydrauliccartridgevalves.SubsequentlytheMSControlValvewillbeclosedbyspringforce..Date ShanghaiElectricPowerGenerationEquipmentCo.Ltd.TURBINEGOVERNINGSYSTEM(GRE)ChapterSheet2ofDocumentParticularSteadyHouseLoadThisoccurswhenthegeneratorcircuitbreakerisclosedbutthehighvoltagecircuitbreakersareopen.Theturbinegeneratorisnotsynchronizedtothegrid,butissupplyingstationauxiliaryloads.Followingaloadrejectiontohouseloadthedroopissettotheunsynchronizedvalueandthespeedsetpointissettojustabovenominal.TheDocumentParticularSteadyHouseLoadThisoccurswhenthegeneratorcircuitbreakerisclosedbutthehighvoltagecircuitbreakersareopen.Theturbinegeneratorisnotsynchronizedtothegrid,butissupplyingstationauxiliaryloads.Followingaloadrejectiontohouseloadthedroopissettotheunsynchronizedvalueandthespeedsetpointissettojustabovenominal.Thespeedwillthenbecontrolledjustbelowthesetpointbyanamountdependingonthedroopsetting.Thesetpointvalueshouldthereforebeselectedasappropriatefortheunsynchronizeddrooptogiveasettledspeedclosetonominal.Date ShanghaiElectricPowerGenerationEquipmentCo.Ltd.TURBINEGOVERNINGSYSTEM(GRE)ChapterSheet3ofDocumentParticularTransientThiswillresultfromanytripsignal(overspeed,lowlubricationoilpressure,electricalorhand)andcausesallthemainsteamstopvalvestobeclosed.AturbinetripcanbeinitiatedbytheSTCinAS620Tviatheturbineprotectionsystem(GSE).DuringaDocumentParticularTransientThiswillresultfromanytripsignal(overspeed,lowlubricationoilpressure,electricalorhand)andcausesallthemainsteamstopvalvestobeclosed.AturbinetripcanbeinitiatedbytheSTCinAS620Tviatheturbineprotectionsystem(GSE).Duringaturbinetripthemainsteamstopvalvescloseattheirfastestrateandareheldcloseduntilthehydraulicprotectioncircuitsarereset.Aloadrejectionoccurswhenacircuitbreakeropensthusdisconnectingloadfromtheturbinegenerator.Theloadrejectionmaybefullorpartial,dependingontheloadwhichremainsconnectedtothegeneratoraftertheincident.DuringaloadrejectiontheSTCinAS620Twilldetectaturbineaccelerationaswellasanincreaseinspeed.Thevaluesofspeedriseandaccelerationdependonthesizeoftheloadrejection.VariationofPowerThepowercanbefedredundantlyfromtwoseparatenetwork,LMCandLNE.Lossofeitheroneofthesesuppliescausesnolossoffacilities.ThecomponentsofOM650,ES680systemsareconnectedtoauninterrupted230Vpowersupply.TheAS620systemissuppliedwith24VDC.ShouldAS620systemhavealreadylostonesupplyandthesecondthenfails,itwillgointoprotectionandturbinewillbetripped.FailureofonesteamturbineAsinglefailureofonehardwarecomponentofthesteamturbinecontrollerinthecabinetwillinitiateachangeovertotheredundantsystem.Duringloadrun-upthesubgroupcontrol(SGC)ofthesteamturbinestopstheloadset-point.Aturbinetripwillnotbeinitiated.NoconsequencesofplantDate ShanghaiElectricPowerGenerationEquipmentCo.Ltd.TURBINEGOVERNINGSYSTEM(GRE)ChapterSheet4ofDocumentNote:Specificcontrollersitself(e.g.load,speedandpressurecontroller)cannotfail.Onlyhardwarecomponentsormeasuringdevicesmayfail. FailureofbothsteamturbineDocumentNote:Specificcontrollersitself(e.g.load,speedandpressurecontroller)cannotfail.Onlyhardwarecomponentsormeasuringdevicesmayfail. FailureofbothsteamturbineDoublefailuresofhardwarecomponentswillnotautomaticallyinitiateaAllcontrolvalveswillbeclosedslowly.Reactorpowerwillbedecreasedaccordinglydowntominimumreactorpower.Pressurecontrolwillbetakenoverbybypass5.3.6Malfunctionofsteamturbinecontrollercausingover-orunder-Thesemalfunctionswillnotinitiateaturbinetrip.Prolongedtimeofoperationisnotrecommended.Aturbinetripwillonlybeinitiatedeitherbytheturbineprotectionsystemforhigherfrequency(110%ofnominalfrequency)orbythegeneratorprotectionsystemduringloadoperationforlowerfrequency(95%ofnominalfrequency).Duringspeedcontrolifspeeddropsbelow95%ofnominalspeedwhilewithinacriticalspeedrange,thespeedisreduceddowntoturningspeed.Whenoutsidethecriticalspeedrangeagain,speedcanthenbeincreasedagain.MalfunctionoftheThebinaryhardwaresignalsfromthesynchronizerareredundantlyavailable.Incomingpulsesarereleasedonlyaboveacertainspeedlimit.Thespeedcanonlybealteredwithintherangeofthislimitandanupperspeedlimit,whichensuresthatthesteamturbinewillnotbeoperatedinanon-permissiblespeedrange.Thus,amalfunctionorfailureofthesynchronizermayleadtoDate ShanghaiElectricPowerGenerationEquipmentCo.Ltd.TURBINEGOVERNINGSYSTEM(GRE)ChapterSheet5ofDocumentdeviatingfromsynchronizingspeedwithinthementionedspeedDisturbanceofHPControlValveActuatorsandControlFollowingmalfunctionoftheHPControlValvecanFailure(de-energizing)ofDocumentdeviatingfromsynchronizingspeedwithinthementionedspeedDisturbanceofHPControlValveActuatorsandControlFollowingmalfunctionoftheHPControlValvecanFailure(de-energizing)ofactuationofservo(ECS:GRE01/02/03/0422EL;KKS:Failure(de-energizing)oftripsolenoidFailure(de-energizing)ofpositionThetripclosingtimeofallSTcontrolvalvesischeckedregularly.TheclosingtimemeasurementispartoftheATT.Incaseofcontrollerfault,thevalvecanbeclosedmanually.Ifonetripsolenoidvalvefailsinopenposition,thesimultaneousoftheredundanttripsolenoidvalvewillensuresafeshutoffofAnyleakagesofcollectedinthecontrolfluidatthehydraulicactuatorwillbepansbelowtheactuator.Leakagesensor(ECS:GME01/02/03/0421MN;KKS:MAA12/22/32/42CL011)areinstalledatthedrippans.DisturbanceofControlValveActuatorsandLPControlIfonecontrolvalveactuatorfailsdueFailureofpositioncontrollerinSTcontroller(ECS:GRE,KKS:(de-GRE11/12/13/1442DR;KKS:Failure(de-energizing)oftripsolenoidvalves(ECS:GSE11/12/21/2243EL,GSE11/12/21/2244EL;KKS:MAC12/22/32/42AA013/AA014)Date ShanghaiElectricPowerGenerationEquipmentCo.Ltd.TURBINEGOVERNINGSYSTEM(GRE)ChapterSheet6ofDocumentFailure(de-energizing)ofpositiontransducers(ECS:DocumentFailure(de-energizing)ofpositiontransducers(ECS:GRE11/12/21/2281MM;KKS:MAC12/22/32/42CG151)TheLPcontrolvalveisclosedbyspringforceoftheactuator.IncaseofclosureofoneormoreLPControlValvesthesteamturbinewillbeTheredundantdesignoftripsolenoidvalvesprovidesasafetytripoftheLPvalvesincasethatoneofthesolenoidvalvesfails.ThetripclosingtimeofallSTcontrolvalveswillbecheckedregularly.TheclosingtimemeasurementispartoftheATT.Ifonevalveactuatorfailsbyexceedingthepermissibleclosingtimeitcanbeclosedmanually.IncaseofaloadrejectiontohouseloadandoneLPcontrolvalvefailedinopenposition,theover-speedprotectiontripstheST.Anyleakagesofthehydraulicvalveactuatorswillbecollectedindrainpansbelowtheactuators.LeakagesensorsareinstalledatthedrainDate ShanghaiElectricPowerGenerationEquipmentCo.Ltd.TURBINEGOVERNINGSYSTEM(GRE)ChapterSheet7ofDocumentStart-upandNormalTheturbinecanonlybestartediftheSTCisinserviceandtheturbineprotectionsystemhasbeenreset.Aseriesofpre-startchecksensuresauxiliaryplantisinasatisfactoryconditionforstart-up.Thesteamturbineisstartedupusingthespeedcontroller.Thesteamturbinespeedtracksthespeedset-pointwiththespeedset-pointtransientandthemaximumpossibleDocumentStart-upandNormalTheturbinecanonlybestartediftheSTCisinserviceandtheturbineprotectionsystemhasbeenreset.Aseriesofpre-startchecksensuresauxiliaryplantisinasatisfactoryconditionforstart-up.Thesteamturbineisstartedupusingthespeedcontroller.Thesteamturbinespeedtracksthespeedset-pointwiththespeedset-pointtransientandthemaximumpossiblerateofchangefromthetemperaturestressinfluence.Thespeedcontrollerstartsupfromturningspeedofthesteamturbine.Onstart-up,turbinespeedthroughthecriticalspeedrangesismonitoredwiththeaidofatransientmonitoringfunction.Thisservestoprotecttheturbinebladesandthelineofshaftingfromresonancevibrations.Forsynchronizationatfirstaspeedset-pointissetthatcausesaslightover-frequency.Thisservestopreventmotoringofthegenerator,i.e.reversepowerflowwhenconnectedtothepowergrid.Withtheaidofthesynchronizingunitthespeedset-pointcanbealteredwithinasmallslightspeedrange.Aftersynchronizationthespeedset-pointisratedspeed.Aftersynchronizationtheturbinegeneratorsetisloadedwiththeloadcontrollerfromratedspeedwhiletakingthepermissibleloadingtransientsintoconsideration.Themaximumpermittedtransientissetinaccordancewiththeloadcapabilitiesofthereactorandtheelectricalgridforloadingandunloadingoftheturbinegeneratorset.Toprotectthesteamturbinethesetransientswillbelimitedtemperaturemarginsofthesteamturbine.Theloadautomaticallytoreactorminimumload.Thereafter,set-pointshouldbegivenbytheoperator.bypermissibleset-pointissetahigherloadDate ShanghaiElectricPowerGenerationEquipmentCo.Ltd.TURBINEGOVERNINGSYSTEM(GRE)ChapterSheet8ofDocumentThebasicshutdownprocedureappliesatallDocumentThebasicshutdownprocedureappliesatallThesteamturbinecanbeshutdownbythesubgroupcontrol.Alowerlimitforloadset-pointisautomaticallysetasthesetvalue.Theloadset-pointcontroltracksthisinlinewiththegradientcalculatedbyatemperaturestressinfluencefunction.Thecontrolvalveswillfullycloseandthiswillactivatethemotoringofthegenerator,i.e.reversepowerflowwhenconnectedtothepowergridandthereaftersteamturbinetripwillbeinitiated.Anotherpossibilitywillbetrippingthesteamturbineate.g.reactorminimalload.ShutdownLongDate ShanghaiElectricPowerGenerationEquipmentCo.Ltd.TURBINEGOVERNINGSYSTEM(GRE)ChapterSheet9ofDocumentOtherThevalveexercisingisprovidedtoallowallthesteamvalvesunderthecontroloftheSTCtobestrokedopenandclosedwiththeturbineoffload.ValveopeningandclosingiscontrolledfromtheHMI.OverspeedOverspeedtestingmaybeperformedpriortosynchronizinginordertotesttheoperationoftheelectronicoverspeedtripdevices.SeedetailsDocumentOtherThevalveexercisingisprovidedtoallowallthesteamvalvesunderthecontroloftheSTCtobestrokedopenandclosedwiththeturbineoffload.ValveopeningandclosingiscontrolledfromtheHMI.OverspeedOverspeedtestingmaybeperformedpriortosynchronizinginordertotesttheoperationoftheelectronicoverspeedtripdevices.SeedetailsinGSEsystem.AutomaticSynchronizingandBlockHavingruntheturbineuptonominalspeedtheoperatorispermitted pre-synchronizingcheckshavebeenpassed.TheturbinegeneratorissynchronizedtothehighvoltagegridbyclosureofeitherthegeneratorcircuitbreakeroroneoftheH.V.circuitbreakers.Theautomaticsynchronizerwillmatchvoltage,phaseandfrequency,andhavingdonesowillinitiatebreakerclosing.HPMinimumPressureTheHPMinimumPressureControlleractsasalimitcontrollerforHPInletPressureControl.Itsupportsthereactorpressurecontrolduringfault-relatedHPpressuredrops.IftheHPpressurefallsbelowanadjustablelimitvalue,e.g.3barbelowtheoperatingcurve,theturbinecontrolvalveswillthrottletocounteractanyfurtherHPpressurereduction.Inthisway,thepressurewillrecovertonominalasquicklyasAsteamvalverequiresreinstatinginordertobringitbackonDate ShanghaiElectricPowerGenerationEquipmentCo.Ltd.TURBINEGOVERNINGSYSTEM(GRE)ChapterSheet10ofDocumentfollowingcorrectionofanyDocumentfollowingcorrectionofanyfaultwhichhasledtoavalvemoduletrip.The On-loadValveTheHPstopvalveandcontrolvalvescanbeclosedwiththeturbineonloadinordertotesttheiroperation,anditisthesametoLPstopandcontrolvalves.FulldetailsaregiveninChapterDate ShanghaiElectricPowerGenerationEquipmentCo.Ltd.TURBINEGOVERNINGSYSTEM(GRE)ChapterSheet11ofDocumentControlConditioningPrincipleofActualValueforDocumentControlConditioningPrincipleofActualValueforSpeedNT(ECS:ThethreeActualvalueforspeedsignalsNT1,NT2andNT3areconditionedinexternalelectronichardwarewithinthesteamturbineprotectionsystemDTSZandinputfromthisdirectlyintothesteamturbinecontroller.Highfrequencyinterferenceisfilteredoutforeachsingleinputsignal.Ina1st-out-of-3selectionfunction,theActualvalueforspeedNT1isselectedfromthethreeinputvalues.Ifafaultoccursinthefirstchannelfortheactualvalueforspeed,thisisimmediatelydetectedbytheselectionfunctionandbumplesstransfertothesecondchanneltakesplace.Inaddition,themessageFaultinactualvalueforspeed1STNT1isdisplayed.Ifthesecondactualvaluechannelalsofails,thethirdchannelisactivatedandthemessageFaultinactualvalueforspeed2STNT2isdisplayed.Ifonlythesecondchannelfails,themessageFaultinactualvalueforspeed2STNT2isdisplayed.Ifonlythethirdchannelfails,themessageFaultinactualvalueforspeed3STNT3isdisplayed.TheactualvalueforspeedNTisforwardedtothemodulesundautomationequipmentlistedbelowastherepresentativeactualvalueforSpeed/loadcontrollerSpeedsetpointOperationandmonitoringsystemTurbinemastercontrolprogramSteamturbineprotectionsystemTurbinestressevaluationModuleControlturbinevalves(EHAcontrolDuringturbine-generatorstartup,certaincriticalspeedbandsmustDate ShanghaiElectricPowerGenerationEquipmentCo.Ltd.TURBINEGOVERNINGSYSTEM(GRE)ChapterSheet12ofDocumentpassedthroughasquicklyaspossible.ThisservesDocumentpassedthroughasquicklyaspossible.Thisservestoprotecttheturbinebladesfromresonancevibration:Limitvalueforcriticalspeedband1startGSP1AtoLimitvalueforcriticalspeedband1endGSP1EorLimitvalueforcriticalspeedband2startGSP2AtoLimitvalueforcriticalspeedband2endGSP2EAslongasspeedisnotwithinoneofthecriticalspeedbandsandthemonitoringofthecriticalspeedrangesFGNF1/2isreleased,thesignalforturbinespeedoutsidecriticalspeedbandNTASPisoutputtothespeedsetpointsubmoduleNS.Ifspeedfallsbelowthesetspeedtransientwhilewithinacriticalspeedband,thisleadstoviolationofthelimitvalueforspeedgradientGNTGRD,orifthemessageFaultinTSEWTSisissued,thespeedsetpointisrampeddownviathesignalforAbortstartupANFABR.ThiscriterionissavedandthemessageSpeedgradienttoosmallNTGRKListransmittedtotheOMsystemandtheturbinemastercontrolprogramDTS.Whenspeedisnolongerwithinacriticalspeedband,thismessagecanberesetviatheOMsystemusingthesignalforAcknowledgesetpointcontrolSWFQandthestartupprocedurecanbecontinued.Tosimulateagridfrequencyupset,aspecialfunctionisimplementedandcanbeappliedtotheactualvalueforspeed.Thestartcommandforinitiationofthissimulatedgridfrequencyupset,itsassociatedgradients,magnitudeanddurationareadjustablewithincertainlimits.ConditioningPrincipleofActualValueforLoadThethreeActualvaluesforloadPEL1andPEL2arereadintothesteamturbinecontrollerdirectlyfromtheplantANL.Innormaloperation,the1stactualvalueforloadisselectedina-out-of-3selectionfunctionandoutputtothemodulesandautomationequipmentlistedbelowastheActualvalueforloadPEL:LoadrejectionidentificationSpeedset-pointLoadset-pointDate ShanghaiElectricPowerGenerationEquipmentCo.Ltd.TURBINEGOVERNINGSYSTEM(GRE)ChapterSheet13ofDocumentSpeed/loadcontrollerOperationandmonitoringsystemTurbineDocumentSpeed/loadcontrollerOperationandmonitoringsystemTurbinemastercontrolprogramTurbinestressevaluationLoadset-pointmaximumThethreeActualvaluesforloadPEL1,PEL2andPEL3aremonitoredforfailureanddeviation.Ifonevaluefails,continuedoperationofthesteamturbineisstillpossibleanditisswitchedtoaMAX-selectionforthetworemainingvalues.ThemessageFaultinloadmeasurement1STPEL1isoutputtotheOMsystemintheeventoffailureofactualvalue1orFaultinloadmeasurement2STPEL2intheeventoffailureofactualvalue2aswellasFaultinloadmeasurement3STPEL3intheeventoffailureofactualvalue3.Iffailuresaredetectedinallthreechannels,themessageFaultinloadmeasurementSTPELisoutputtotheOMsystem.ConditioningPrincipleofActualValueforMainSteamPressurePFD(ECS:VVP0001MY)ThethreeActualvaluesformainsteampressurePFD1,PFD2andPFD3arereadintothesteamturbinecontrollerdirectlyfromtheplantANL.Innormaloperation,the1stactualvalueformainsteampressureisselectedina1st-out-of-3selectionfunction.Usingalow-passfilter,pressurevariationsinthepipingandelectromagneticinterferencearefilteredout.ThisfilteredsignalisoutputtothemainsteampressuresetpointsubmoduleFDS,mainsteampressurecontrollersubmoduleFDPR,admissionsetpointformationOSBastheActualvalueformainsteampressurePFD.ThisvalueisdisplayedontheOMsystem.ThethreeActualvaluesformainsteampressurePFD1,PFD2andPFD3aremonitoredforfailureanddeviation.Ifonevaluefails,continuedoperationofthesteamturbineisstillpossibleanditisswitchedtoaMAX-selectionforthetworemainingvalues.ThemessageFaultinmainsteampressuremeasurement1STPFD1isoutputtotheOMsystemintheeventoffailureoftheactualvalue1orFaultinmainsteampressuremeasurement2STPFD2intheeventoffailureoftheactualvalue2aswellasFaultinmainsteampressureDate ShanghaiElectricPowerGenerationEquipmentCo.Ltd.TURBINEGOVERNINGSYSTEM(GRE)ChapterSheet14ofDocumentmeasurement3STPFD3intheeventofDocumentmeasurement3STPFD3intheeventoffailureoftheactualvalueIffailuresaredetectedinallthreechannels,themessageFaultinmainsteampressuremeasurementSTPFDisoutputtotheOMsystem.Speedset-pointNS(ECS:Manualsettingofthespeedset-pointcanbeperformedviatheOMsystemusingthesignalforManualsettingforspeedset-pointVGNS,providedthatthisisnotinhibitedbyanyothersignal.Theset-pointcontroltracksthisvaluewiththegradientcalculatedbythetemperaturemarginsubmoduleWTF:OFBNforUppermarginforUFBNforLowermarginforThedelayedspeedset-pointNSVisappliedtothespeed/loadcontroller.OnissueofthecommandfromtheturbinemastercontrolprogramDTSforSetspeedset-pointtoholdingspeedNSWART,thespeedset-pointissettoHoldingspeedNWARTtowarmuptheturbineandtheset-pointcontrolisthentrackedwiththegradientdefinedbytemperaturemarginsubmoduleWTF.TheSpeedset-pointNSisthenmatchedtotheDelayedspeedset-pointNSVandthestart-upprocessstoppedifthesignalsforFaultinTSE,storedandTurbinespeedoutsidecriticalspeedbandNTASPareactive.Inthismatchedcondition,thesignalforSpeedset-pointmatchedNSABGLisgenerated,allowingactivationanddeactivationofthetemperaturemarginsintemperaturemarginsubmoduleWTF.Forsynchronization,theCommandforsetspeedset-pointtosynchronizingspeedNSYNCisusedtosetaspeedsetpointthatcausesaslightover-frequency,theSpeedset-pointforsynchronizationNSYN.Thisservestopreventmotoringofthegenerator,i.e.reversepowerflowwhenconnectedtothepowergrid.WiththeaidofthesynchronizingunitandtheSynchronizationcommandHIGHERSYHandSynchronizationcommandLOWERSYT,theset-pointcanbealteredwithintherangebetweenSpeedset-pointlowerlimitNSUGandSpeedset-pointupperlimitNSOGwiththeSynchronizinggradientforspeedset-pointNSVGSY.InspeedoperationthesynchronizingunitisDate ShanghaiElectricPowerGenerationEquipmentCo.Ltd.TURBINEGOVERNINGSYSTEM(GRE)ChapterSheet15ofDocumentlimitedupwardsanddownwardsDocumentlimitedupwardsanddownwardsbyspeedlimitvalues.InloadoperationthesynchronizingunitisinterlockedbytheloadswitchAftersynchronization,thesignalforLoadoperationLBisgeneratedinthespeed/loadcontrollersubmoduleNPRandtheset-pointissettoNominalspeedNNOMwhentheLimitvalueforminimumloadPMINisreached.OnLoadrejectionduringloadoperationwithspeedcontrollerLALBNR,thespeedset-pointisalsosettoNNOM.Underthefollowingthreedifferentconditions,thespeedset-pointistrackedtotheactualvalueforspeedforthedeceleratingdownturbineminusanadjustabledeltaK1.Thisensuressafeandreliableclosureofthecontrolvalves:Ifduringturbinestart-up,speedfallsbelowthesetspeedtransientwithinacriticalspeedband,thesignalforAbortstartupANFABRisusedtostopthisprocess.Ifthesettingfortheturbinestart-upandliftlimiterTABisbelowtheadmissionstartvalue,thisisthentrackedinresponsetothesignalforLimitvaluefortrackingforturbinestartupandliftlimiterTABGNF.IftheturbinehasbeentrippedbythesteamturbineprotectionsystemDTSZusingthesignalforSteamturbinetripSS.Theaboveconditionsaresaved,displayedontheOMsystemwiththemessageTrackspeedset-pointNSNFandcanberesetagainusingthesignalforAcknowledgeset-pointcontrolSWFQprovidedthatTurbinestart-upandliftlimitersetto50%TAB50isactiveandthesignalforLimitpressurereachedGDERisnotactive.Thespeedset-pointcontrolisstoppedifthedifferencebetweentheDelayedspeedset-pointNSVandTurbinespeedNTislargerthantheLimitvalueforcontroldeviationforspeedGDNTandtheSpeedset-pointcontrolisrampingupNSVH.ThisinadmissibleconditionissignaledontheOMsystemwiththemessageControldeviationforspeedtoolargeDNTGR.Thespeedset-pointcontrolislikewisestoppedusingthesignalforStopspeedset-pointcontrolSTNPSifadiscrepancy,forexampleamissingstart-upcriterion,isdetectedduringstart-upoftheturbinewiththemastercontrolprogramTAA.TheSpeedset-pointNSandtheDelayedspeedset-pointNSVaresettoappropriatecalculatedvaluesoncontrollerswitchoverbetweenloadoperationwithloadcontrollerandloadoperationwithspeedcontrollerDate ShanghaiElectricPowerGenerationEquipmentCo.Ltd.TURBINEGOVERNINGSYSTEM(GRE)ChapterSheet16ofDocumentusingthesignalsforSetcommandSBandSetvalueforspeedset-pointSVNS.ThisfacilitatesbumplesstransferbetweenoperatingDuringloadDocumentusingthesignalsforSetcommandSBandSetvalueforspeedset-pointSVNS.ThisfacilitatesbumplesstransferbetweenoperatingDuringloadoperationoftheturbine-generatorwithspeedcontrollertheSpeedset-pointNSthenequalsnominalspeedNNOMplusspeedcontrollerdroop.IfthesignalforLoadrejectionidentificationLAWisissuedinthiscondition,thisthensetstheSpeedset-pointNSandtheDelayedspeedset-pointNSVbacktoNominalspeedNNOM.Thismeasurecausesclosureofthecontrolvalves,thuslimitingoverspeed.BoththeSpeedsetpointNSandtheDelayedspeedsetpointNSVaredisplayedontheOMsystem.Loadset-pointPS(ECS:Theloadset-pointissetviatheOMsystemusingthesignalforManualsettingforloadset-pointVGPS,providedthatitisnotinhib