TPSTU02.docx

TPSTU02.docx

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TPSTU02

ABBAutomationInc.

ETSITurbine&RotatingMachineryControls

TurbineProtectionSystem（TPS）

TerminationUnit（TPSTU02）

RevisionBboard

User'sManual

–CONTENTS–

SECTION1Introduction1-1

1.1Overview1-1

1.2HydraulicOverspeedProtectionSystems1-3

1.3SpeedProbeApplications1-4

1.4TerminationUnitSpecifications1-5

SECTION2TerminationUnitFunctionalDescription2-1

2.1Overview2-1

2.2ProtectiveRelayLogic&Operation2-2

SECTION3Installation&Configuration3-1

3.1SpecialHandling3-1

3.2UnpackingandInspection3-1

3.3Module/TerminationUnitCabling3-1

3.4TerminationUnitDIPSwitch,Jumper,andDIPShuntConfiguration3-2

3.5TerminationUnitFuses3-7

3.6TerminationUnitWiring3-8

3.7TerminationUnitRelays3-15

3.8StartupPreparation3-16

SECTION4Maintenance4-1

4.1MaintenanceSchedule4-1

4.2ReplacementParts4-1

4.3Repair/ReplacementandOrderingProcedures4-1

–TABLES–

Table1TerminationUnitSpecifications1-5

Table2TerminationUnitOSP,EHC,andTRIPProtectionRelayTruthTable2-2

Table3AnalogDIPshuntXU1–XU6Assignments3-3

Table4AnalogOutputConfiguration3-4

Table5MedianSelectAnalogOutput（TB11-25&26）Configuration3-4

Table6FunctionoftheJumpersintheSpeedInputCircuits3-5

Table7JumperAssignmentsforEachSpeedInput3-5

Table8MaintenanceSchedule4-1

–FIGURES–

Figure1TPSApplicationExample1-2

Figure2TypicalTurbineProtectionSystem1-3

Figure3ManifoldHydraulicCircuit1-4

Figure4TerminationUnitInput/Outputs2-1

Figure5TerminationUnitDIPSwitch,Jumper,&DIPShuntLocations3-2

Figure6AnalogInputDIPshuntConfigurationfor3IndividualInputs3-3

Figure7AnalogInputDIPshuntConfigurationforaSingleInput3-4

Figure8SpeedInput#1Circuit3-5

Figure9RecommendedJumperConfigurationforDifferentSpeedProbeTypes3-6

Figure10TerminationUnitFuseLocations3-7

Figure11TerminationUnitTerminalBoardLocations3-8

Figure12TerminationUnitPowerConnections3-9

Figure13SingleAnalogInputConnections3-12

Figure14SingleDigitalInputConnections3-13

Figure15PassiveSpeedProbeWiringConnections3-14

Figure16+24VDCPoweredActiveSpeedProbeWiringConnections3-14

Figure17–24VDCPoweredProximityProbeWiringConnections3-14

Figure18TerminationUnitRelayLocations3-15

!

WARNING!

Observetheseprecautionswhenconfiguring,calibrating,orservicingthisdevice.

1.Onlyqualifiedpersonnelshouldconfigure,calibrate,orservicethisdevice.SystemengineersandtechniciansshouldreadthismanualbeforeinstallingandoperatingtheTurbineProtectionSystem.Amoduleorterminationunitshouldnotbeputintooperationuntilthisinstructionisreadandunderstood.

2.Disconnectpowerortakeprecautionstoensurethatcontactwithenergizedpartsisavoidedwhenservicing.

3.Allcomponentswhetherintransportation,operation,orstoragemustbeinanon-corrosiveenvironment.

4.Thecontrolsystemapplicationmustbecarefullyevaluatedwheneverconfiguringorperformingmaintenancetopreventpersonnelinjuryand/orpropertydamageinthecaseofcomponentfailureorimproperoperation.

TheterminationunitcontainsElectrostaticSensitiveDevices（ESD）.Obeyanti-staticprecautionsanduseanti-staticprotectionwhenservicing.

**NOTE**

Variousturbinemanufacturersusedifferenttermsforturbinevalvesandcomponents.Forexample,thismanualusestheterm“GovernorValve”forthesteamchestvalve（s）whereassometurbinesprefer“ControlValve”.Similarly,theterm“ThrottleValve”isusedforthevalve（s）upstreamoftheGovernorValvewhereassometurbinesprefer“StopValve”.TheterminologyusedinthismanualisnotintendedtoindicateapreferenceforonemanufactureortolimittheapplicationontheTurbineProtectionSystem.PleaseconsultwithETSIifthereareanyquestionsorconfusionregardingtheterminologyusedinthismanual.

SECTION1Introduction

1.1Overview

TheTurbineProtectionSystem（TPS）consistsofthreeTPS02modulescabledtoasingleTPSTU02terminationunit.Allelectronicoverspeedrelatedprotectivefunctionsaremonitoredandinitiatedinthemodulesandterminationunit.TheseprotectivefunctionsareindependentoftheInfi90MultifunctionProcessor（MFP）anddatahighways.Tripleredundantinputs,2-of-3-protectionlogic,andon-linetestingcapabilityareusedtoprovidehighreliability.Eachoftheprotectivefunctionsutilizesrelaysontheterminationunittocontrolactivationofthefunction,threeofwhichhavefourrelayoutputsforusewithhydraulicmanifoldssuchasthoseprovidedbyETSI,whichuse“1-of-2-twice”logicthatallowsforon-linetestingofthemanifolds.Themoduleutilizesanon-boardmicroprocessorandmemorytoprocessinputdata,controloutputs,andcommunicatewiththeBaileyInfi90OPENcontrolsystem.Themoduleprovidesthefollowingoverspeedprotectivefunctions:

OverSpeedProtection（OSP）:

TypicallyactivatestheOverSpeedManifoldthatshutstheGovernorandInterceptValvestocontrolanoverspeedsituationwithouthavingtoinitiateaturbinetrip.Twoconditionswillactivatethisfunction:

（1）turbinespeedexceedstheOSPsetpoint（typically103%ofratedspeed）

or

（2）thegeneratorbreakeropenswithturbineloadaboveaminimumthresholdvalue.Thisactionoccursregardlessofactualturbinespeedinanticipationofanoverspeedcondition.

TurbineTrip（TRIP）:

OperatesinparallelwithorinlieuoftheOEMelectricalturbinetrip（typicallyasolenoiddumpvalveintheturbinecontroloilcircuit）thatrapidlyshutsalloftheturbinevalveactuators.Thesetpointistypically110%ofratedturbinespeed.

EHCProtection（EHC）:

OperatesinconjunctionwiththeTRIPfunctiontoactivatetheEHCManifold,whichdumpsthehydraulicpressuretoallofthevalveactuators.ThesetpointisthesameastheTRIPsetpoint.

PowerLoadImbalance（PLI）:

Megawatts（electricalloadoutput）andIntermediatePressure（IP）TurbineExhaustPressure（mechanicalloadinput）arecomparedtodetermineifthereisanimbalancebetweenthetwo.Iftheturbinemechanicalloadinputexceedstheelectricalloadoutputbyasetamount,anoverspeedsituationisanticipatedandadigitaloutputisgeneratedforaspecifiedtimeperiod,whichistypicallyusedtobrieflyclosetheInterceptValves.

Themoduleprovidesturbinespeed,megawatts,IPexhaustpressure,andloadimbalancevaluesplusturbinetripandgeneratorbreakerstatustotheMFPovertheInfi90ExpanderBus.Duringnormaloperation,aFrontPanelDisplayonthemoduleprovideslocalindicationofturbinespeed,megawatts,loadimbalance,andmodulestatus.TheFrontPanelDisplayisalsousedduringmoduleconfigurationtodisplaytheconfigurationparameters.Push-buttonsontheFrontPanelDisplayareusedtomakechangestothemoduleconfiguration.

Eachmodulegeneratestripsignalsandcalculatesturbinespeedandloadimbalanceindependentoftheothers.Interposingrelaysareprovidedforalldigitaloutputs.Whenamodulegeneratesaprotectivefunctionsignal,itactivatesarelayontheTU.Theterminationunituses2-of-3modulesvotingtodeterminewhentoactivateallrelaysassociatedwiththatprotectivefunction.Eachmoduleisprovidedaseparatespeedinputsignalfromtheterminationunit.Amedianselectioncircuitontheterminationunitisusedtoselectananalogoutputsignalfromthethreemodules.Themedianselectioncanbespeed（default）,megawatts,IPexhaustpressure,ordeltapower.

Figure1illustratesabasicInfi90turbinecontrolsystemusingtheTPSforturbine-overspeed-protection.AllfieldI/Oisconnectedtotheterminationunit,whichexchangessignalswiththemodule.CommunicationsbetweentheassociatedMulti-FunctionProcessor（MFP）andthemoduleareviatheExpanderBus.OtherMFPscanaccessthedatainthemoduleviatheControlway.

Figure1TPSApplicationExample

WhentheTPSisintegratedwithanETSIturbinecontrolsystem,overspeedprotectionisindependentoftheInfi90processorsanddatahighways.Thus,turbineprotectionisretainedevenintheunlikelyeventofafailureoftheredundantprocessorsanddatahighways.Turbinespeed,Megawatts,IPExhaustpressure,orDeltapowermaybemonitoredusingtheanalogoutputsignalsfromtheterminationunit.IfanMFPshouldfail,turbinecontrolcanbemaintainedviatheEmergencyManualfeatureoftheHydraulicServoModuleusedinETSIturbinecontrolsystems.

ForturbinesthatdonothaveanInfi90basedturbinecontrolsystem,astand-aloneturbineoverspeedprotectionsystemcanbeconfiguredusingthreemodulesinstalledinasingleModularMountingUnit（MMU）connectedtooneterminationunit.AmodularpowersupplymountsintheMMUalongsidethemodules（redundantsuppliescanbeusedifdesired）.TripsetpointsandotherparametersareenteredthroughtheFrontPanelDisplayonthemodule.ThisconfigurationprovidesthesameoverspeedprotectionfunctionsandturbinespeedindicationasasystemintegratedintoanInfi90turbinecontrolsystemexceptitdoesnotprovidetheabilitytotestthetripfunctionsoroutputanyanalogvaluesexceptturbinespeed.TheFrontPanelDisplayprovideslocalindicationofMegawatts,PowerLoadImbalance,andTurbineSpeed.ByaddinganMFPandauserinterfacemoduletothesystemconfiguration,allofthefunctionsdetailedinthisdocumentareavailable.

1.2HydraulicOverspeedProtectionSystems

TheTPSwasspecificallydesignedforusewithelectro-hydraulicprotectionschemessuchastheoneshowninFigure2.Thevarioushydraulicmanifoldsacttodepressurizetheassociatedhydraulicheadertoinitiatethefunction.Forotherprotectionsystems,theoutpu