Transcript
  • General Purpose Steam Turbine Control Application (STCA-GP)

    for mechanical drives

    Main components• IndustrialPLC• Operatordisplay• PCbasedconfigurationtool• SerialinterfacingtoPCS

    Steam Turbine Control Application• Selectionoftwoorthreespeed probes• Automaticfallbackresponseto speedprobefailure

    Predictive control response• Configurablesetpointand processvariable• Predictiveresponsetoavoid overspeeduponsuddendriven loadchanges

    Open loop response• Increaseavailabilityand operabilityofthedrivenunit whichmayotherwisetripon overspeedduetosuddenload change• Actuatorcontrolresponse dampeninguponcompressor surgedetection

    Actuator output• Linearizationofactuatoroutput• Valveactualpositiondeviation alarming(ifpositionfeedbackis available)

    Sequencing• Fullautomaticcold,warmand hotstartofturbine• Automaticstartuptimingbased onrunningandshutdowntiming• Automaticwarmuptimingbased oncasingorflangetemperatures• Criticalspeedzoneramping andavoidance• Loadingandunloadingofa compressorinconjunctionwith itscompanionperformanceand antisurgecontrollers

    Control solutions to the Oil & Gas, Chemical and Petrochemical industries world wideThe turbine governor control or Steam Turbine Control Application (STCA-GP) developed by Control-Care enables fully automated speed control during normal operation as well as start-up/shutdown speed control including critical speed avoidance. It provides a versatile andeconomical way to regulate your steamturbine’s speed, protects the turbineagainst overspeed damage andautomatically sequences startups andshutdowns. The STCA is fullyconfigurable to API611 general purposesteam turbines and is typically integratedinto the train control system using Honeywell’s Control Edge product family. This integration results in improved train control system availability and reliability as well as in reduced system cost.

    TheentireControl-Careturbineandcompressorcontrolschemecanincludecompressorantisurge(ACA)andperformance(PCA)control,compressorauxiliariessequencing,parametricdiagnosticsandESDsysteminterfacing.

    Set point mode selection• Internalsetpoint• Localsetpoint• Remotesetpoint• Cascadesetpoint• Analog,pushbuttons,seriallink

    Limiting control• Maintainturbinespeedwithin allowableoperationalrange• Maintainpredefinedprocess variableswithinlimits

    Cascade control• Controlofanalternateprocess variableusinganindependent setoftuningparameters

    Overspeed prevention• Keepsteamturbinespeedator belowmaximumoperatingspeed usingpredictivecontrolresponseor openloopresponse

    Overspeed and acceleration protection• Turbinetripwhentherotorspeedor accelerationexceedsallowablelimit

    Calculated variables • Currentspeedindicationbasedon numberofinstalledprobesand functioningprobes

    Control-Care BVKabelweg37•1014BAAmsterdam•TheNetherlandsT+31(0)206376801•F+31(0)206362780www.control-care.com•[email protected]

    DeSteiger215•1351AWAlmere•TheNetherlandsT.+31(0)365314014•www.dgfg.nl•[email protected]

  • Graphical interfaces• Controlapplicationfaceplate• Controlapplicationconfigurator

    User friendly application configurator• Upperscreenprovidesforloop configurationsettings• Lowerscreenshowsdedicated loop’scontributiontooverall output

    Control valve testing module• Straightforwardcontrolvalve stroking• Straightforwardcontrolvalve strokeverificationtests• Passwordprotecteduser levelacces

    Overspeed testing module• Simpleandautomated procedureforoverspeed validationandtesting,with manualoverridecapability• Passwordprotecteduser levelaccess

    Control solutions to the Oil & Gas, Chemical and Petrochemical industries world wide

    Turbine performance deviation alarming• Expectedandactual performancearecompared andalarmedincasediverging

    Application control functions are selectable • Customizeeachapplication individuallybyenablingordisabling sitespecificfunctionality (configurationinsteadof programming)

    Alarms and events • Timestampedalarmandevent reportingforsignalingand troubleshootingpurposes

    Critical event stored on control system platform • Standardtrendingofcritical parameters,[x]minutes*prior and[y]minutes*aftertheevent

    Sequence of event history on control system hardware, time stamped • Standard[x]points*history instandalonemode

    *)Quantityisconfigurable

    General Purpose Steam Turbine Control Application (STCA-GP)

    for mechanical drives

    Control-Care BVKabelweg37•1014BAAmsterdam•TheNetherlandsT+31(0)206376801•F+31(0)206362780www.control-care.com•[email protected]

    DeSteiger215•1351AWAlmere•TheNetherlandsT.+31(0)365314014•www.dgfg.nl•[email protected]


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