预览加载中，请您耐心等待几秒...

自适应预估控制及其在火电厂DCS中的应用.docx

预览
1/2
2/2

在线预览结束，喜欢就下载吧，查找使用更方便

下载提示 文本预览

如果您无法下载资料，请参考说明：

1、部分资料下载需要金币，请确保您的账户上有足够的金币

2、已购买过的文档，再次下载不重复扣费

3、资料包下载后请先用软件解压，在使用对应软件打开

自适应预估控制及其在火电厂DCS中的应用 Title:AdaptiveEstimationandControlforPowerPlants'DistributedControlSystems(DCS) Introduction: Powerplantsplayacriticalroleinmeetingtheever-increasingenergydemand.Toensureoptimalandefficientoperation,controlsystemssuchastheDistributedControlSystems(DCS)areemployed.Theabilitytoaccuratelyestimateandcontrolvariousprocessvariableswithinthepowerplantiscrucialformaximizingefficiencyandminimizingemissions.Inrecentyears,adaptiveestimationandcontroltechniqueshavegainedsignificantattentionduetotheirabilitytohandleuncertaintiesandchangesinplantdynamics.ThispaperaimstoprovideanoverviewofadaptiveestimationandcontrolanditsapplicationinpowerplantDCS. 1.AdaptiveEstimationTechniques: 1.1Model-BasedAdaptiveEstimation:Thisapproachinvolvesutilizingamathematicalmodelofthepowerplantsystemtoestimatetheunknownoruncertainparameters.Model-basedestimationtechniquessuchastheExtendedKalmanFilter(EKF)andUnscentedKalmanFilter(UKF)havebeenwidelyusedinpowerplantDCStoestimatevariousprocessvariablesaccurately. 1.2Data-DrivenAdaptiveEstimation:Thisapproachreliesonhistoricaldataandmachinelearningalgorithmstoestimatetheuncertainparameters.TechniquessuchasArtificialNeuralNetworks(ANNs)andSupportVectorMachines(SVMs)havebeenemployedtotrainmodelsbasedonhistoricaldataandmakeaccurateestimationsinreal-time. 2.AdaptiveControlTechniques: 2.1ModelReferenceAdaptiveControl(MRAC):Thiscontroltechniqueusesaknownreferencemodeltoadaptivelyadjustthecontrolparameterstocompensateforuncertainties.MRAChasbeensuccessfullyutilizedinpowerplantDCStomaintainoptimalconditionsbycontinuouslylearningandupdatingthecontrolparameters. 2.2Model-FreeAdaptiveControl:Thiscontroltechniquedoesnotrelyonaspecificmodelofthepowerplantsystem.Instead,itutilizesonlinemeasurementsandoptimizationalgorithmstoadjustthecontrolactions.TechniquessuchasModel-FreeAdaptiveControl(MFAC)andReinforcementLearning(RL)haveshownpromisingresultsinpowerplantDCSbyprovidingonlineoptimizationandadaptationcapabilities. 3.ApplicationofAdaptiveEstimation