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大规模电力系统低频振荡分析与广域自适应控制研究(3)

来源:网络收集 时间:2026-09-12
导读: erroralgorithm,i.e.,pastoutputerrorsinvariables-multiv&riableoutputstatespacemodelidentificationalg

erroralgorithm,i.e.,pastoutputerrorsinvariables-multiv&riableoutputstatespacemodelidentificationalgorithm(POEIV-MOESP),is

proposed.Itisthefirsttimethatthisalgorithmisproposedfordampingcontr01.Thealgorithmmainlyfocusonsolving‘‘identification’’in‘‘controlwhileidentification’’thought.

wellasUnderclosed-loopcondition,systeminputandoutputmeasurementnoisesas

processnoise&reeliminatedbyinstrumentalvariablewhichisformedbysystem‘‘past'’inputandoutputHankelmatrices.Then,spacespannedbythecolumnsofsystemextendedobservabilitymatrixisobtainedbymatrixorthogonal

valueprojection.Withthehelpofsingulardecomposition(SVD)andshiftinv&riantcharacteristicofextendedobservability

canmatrix,systemmatricesAandC

computed

become

trackingbederived.Thereafter,matricesBnewandDCanbeoutputdatasubspaceoutbyusingleastsquarealgorithm.Whensampledinputandavailable,extendedinstrumentalvariable—projectionapproximatec’whilealgorithm(EIV-PAST)isusedtorecursivelyupdateAandrecursiveleastsquare(RLS)algorithm

algorithmtopowerisutilizedtorecursivelyupdateasBandD.Aspectsonapplyingthesystemdampingcontrol,suchclosed loopidentifiabilityofsystemmodel,choiceofpersistentexcitationsignalandscalingfactorforsampleddata,&realsodiscussed

dampinginthisdissertation.Underthecontrolself-tuningprinciplebasedwide-areaadaptivequadraticframework,linearoptimalpartialoutputfeedbacksupplementarydampingcontrollerisdesignedbyusingonlinerecursiveclosed—loopsubspaceidentification

Thealgorithm

containssystemusealgorithm.systemdynamicresponsetoidentifyreduced-ordermodelwhichdominantlowfrequencyoscillationmodes.Thus,difficultyinobtainingpracticalsystemmodelwhichhasveryhighorderisavoided.Additionally,thealgorithmVI

山东大学博士学位论义

hasgoodnumericalstabilityandlowtimecomplexity,whichprovidesbasisfor‘‘control’’in“controlwhileidentification”thought.

SimulationresultsoftheChinaEPRI8-machine36-bussystemdemonstratethattheproposedon -linerecursiveclosed- loopidentificationalgorithmCaneffectivelyidentifyand

lowfrequencytrackreduced.orderstatespacemodelwhichcontainssystem

oscillationmodes,anddominantCanbeusedtoadjustparametersofsupplementarydampingcontrolleron-line.Additionally,supplementarydampingcontrollerCaneffectivelydampsystemintearealowfrequencyoscillations.

3)Witll

intotheregardstoshortcomingofoptimalcontrolwhichcannottakecontrolconstraintsadaptiveoptimization,wide-areadampingcontrolstrategybasedonmodelpredictivecontrol(MPC)isproposed,whichattempts

identification'’thought.Basedontosolving‘‘control’’in‘‘controlwhileidentifiedmodel,systemoutputdisturbancemodelis

topreventoutputsobtainedbyaugmentingsystemstateswithoutputdisturbances

steady.stateoffsets.Kalmanfilterisused

Accordingtotofromestimatestatestheaugmentedmodel.theidentified

anmodel,predictiveequationsforclosed loopsystemarefunctionrepresentingformulated.Thenobjectivethecostofdeviationofsystem

responsesfromthereferencetrajectoryandthecostofimposingdampingcontrolsin

oninfinitehorizonisestablished.Consideringconst …… 此处隐藏:1981字,全部文档内容请下载后查看。喜欢就下载吧 ……

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