电站燃烧锅炉燃烧优化系统分析

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1、华北电力大学硕：l=论文AbstractCoal-firedutilityboilerisnotonlyagreatsourceofpowerbutalsoagreatsourceofpollution．It’Ssignificanttooptimizecombustionoperationofcoal—firedutilityboiler．VariousfactorsaffectingboilerefficiencyandNOxemissionconcentrationcouplemutually，thecombustionsystemprediction

2、modelneedstobeestablished．TheprincipleofBPneuralnetworkisintroducedandBP——AdaboostmodelisgotbyusingAdaboostalgorithmtooptimizeBPneuralnetwork，thentheprincipleofsupportvectormachineisintroduced，especiallyleastsquaressupportvectormachine(LS—SVM)usedfortheconstructionofnon-linearregre

3、ssionmodulusprincipleishighlighted．Basedonboilercombustionadjustmenttestdataof300MWunitcoal—firedboiler，BP—AdaboostmodelandLS—SVMmodelareusedtoestablishcombustionsystemmodelwhoseoutputsareboilerefficiencyandNOxemissionconcentrationandinputsarevariousoperatingvariables．Bothmodelsare

4、analyzedintheoreticalbasis，modelingtime—consuming，generalizationabilityandpracticalapplications．BP——Adaboostmodelismoresuitableforonlinetrainingandpredictingonlargesample．BasedonBP——Adaboostcombustionsystemmodel，boileroperationadjustableparametersastheoptimizationvariables，genetica

5、lgorithmoptimizationtechnologysearchestheglobaloptimizationtargetswhichareboilerefficiencyandNOxemissionconcentration．Double—objectiveoptimizationproblemistransformedintosingle-objectiveoptimizationproblembymeansofweightcoefficient．Accordingtodifferentrequirementsofboilerefficiency

6、andNOxemissionconcentrationinactualoperation，everyconditionisoptimizedundervariableweight．OptimizationresultsshowthatthereisabestcombinationpointbetweenboilerefficiencyandNOxemissions，whichnotonlyensuresthatNOxemissionconcentrationisbelownationalstandardandboilerefficiencycanbemain

7、tainedatahighlevel．Itprovidesguidanceforoptimaloperationofpowerplantboilers．Optimizedparametersshowthemaincombustionzoneuseslow-volumecombustionandthetopthrottleopeningincreases，bothmeetair-stagedcombustiontheory．MATLABlanguageisusedtodevelopcoal-firedutilityboilercombustionoptimiz

8、ationsystemsoftwarewhichin