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Modeling,IdentificationforTheGrateBoilerAComparisonfuzzylogic,PIDandapplicationofoverheatsteamtemperatureBektacheAbdeldjebarandBenmahammedKhierSetifunivertsity1,21DepartmentofElectricalEngineering,SetifUniversity,Algeria(Tel:+21336-91715;E-mailBektachedz@yahoo.fr)2DepartmentofElectricalEngineering,SetifUniversity,Algeria,(Tel:+21377140097E-mail:khierben@lycos.fr)Abstract:Grateboilersarewidelyusedasactivesteamgeneration.Thispaperpresentstheprinciplesformodelingthegrateboiler,simulationisdevelopedonthebasisofprocessexperiments.Thispaperfurtherproposeacontrolsystemforsupplysplitrange(theoverheatsteamtemperatureoverheatsteampressure)beusedcomparefuzzylogicandthePID.Thisworkisperformedinordertofosterandpromoteunbiasedandaccuratecomparisonoffuzzylogiccontroldesignmethodologies.wearemotivationtoexecutethisstudybyrobustnesstoplanperturbationofthefuzzylogiccontrol.Weconcludedfuzzylogiccontrolcanbeausefultoolforthecontrolengineerintheparticularlyofthegrateboiler.Keywords:Modeling,Identification,fuzzylogic,PID,Boiler,overheatSteam,Temperature,pressure.1:INTRODUCTIONTheboilersystemiscrucialpartsofmostpowerplants.Ithasbeenconcernedwithanalyzingpowersystemdynamicsinvariousworks.Themodeldescribesthebehaviorofthesystemoverawideoperatingsystem.Steamoverheattemperatureisoneofthemainprocessesinthegrateboilerbecausesituatedjustbeforetheturbine.Thesteamoverheatstronglyinfluencetheregularityofthefinalqualityproduction.Moreoveritsgreatinteractionwithunitsoftheplanmakesitsensitivetoexternalperturbations.Themostcommonsupportingfuelsareoilsormaterialgas,butwhenchangethefuelsteamload,theoperatorchoosesthevalvesonethevalveopenandotherisclosedfornoteffectedthepressurevalue.TheequationsdescribingtheprocessthermodynamicstheobtainedModelisnonlinearform.Thegeneralstructureofthesimulationmodel.Thedesignofthesimulationmodelofthegrateboilerisbasedonthemodelingstructurespresents.Thepartialmodelourinterestedisshowninfigure1.Simulationmodelofagrateboilerconsistedfourinputsandtwooutputs.thecont
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