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1、JournalofProcessControl9(1999)109±124Re®nery-widecontrolloopperformanceassessmentN.F.Thornhilla,*,M.Oettingerb,1,P.FedenczukcaDepartmentofElectronicandElectricalEngineering,UniversityCollegeLondon,TorringtonPlace,LondonWC1E7JE,UKbBPRe®nery(Kwinana)ProprietaryLtd.
2、,MasonRoad,Kwinana,WA6167,AustraliacBPOil,GrangemouthRe®neryLtd.,POBox30,Bo'nessRoad,Grangemouth,FK39XQ,UKReceived1October1997;receivedinrevisedform15June1998;accepted1July1998AbstractThispaperdiscussestheapplicationofcontrolloopperformanceassessment(CLPA)inare®n
3、erysetting.TheCLPAalgorithmhasseveralparametersthathavetobeadjustedcorrectlytogivethebestresults.Proceduresaredescribedforselectingtheseparameterswhichmakeitfeasibletoimplementthealgorithmonare®nery-widescale.Wereportpracticalexperienceswiththeuseofthetechniques.
4、#1999ElsevierScienceLtd.Allrightsreserved.Keywords:Controlloopperformanceassessment;Re®nery-wide;Implementation;Guidelines;Practicalexperience1.Introductiondetected,forexamplebydeterminationofdynamicresponsecharacteristicssuchastheextentofunder-Previousstudiesoft
5、heperformanceofsingle-input±dampedoroscillatorybehaviour.single-output(SISO)controlloopshaveshownthatSomequantitativemeasuresofperformancesuchasreasonsforpoorperformanceofbasicSISOloopssettlingtimeandtimeintegralmeasuresneedaspecialincludebothpoortuningandequipme
6、ntproblemssuchtestoftheloop,forexampleanexaminationofitsstepasstickingvalves[1±3].Traditionalmethodsusedforresponse.AnewapproachtoperformanceassessmentperformanceassessmentincludeinspectionsofcontrolhasbeendevelopedbyHarris[6],Desboroughandloophardware,loggingoft
7、hepercentageoftimecon-Harris[7]andStanfeljetal.[8].AnadvantageoftheirtrolloopsareinAUTOmodeandcalculationofthemethodsisthattheyprovide®guresofmeritforthemeanandstandarddeviationofthecontrolledprocessperformancewhichcanbederivedduringperiodsofvariables.Improvedcon
8、trolyieldscommercialbene®tsnormalrunningwithouttakingloopso-lineforspecial[4]whileotherbene®tsofasystematicassessmenttests.Thesemethodsarebecomingwidelyimpleme
