基于混合算法与最小动能特性的暂态稳定预防控制研究

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1、ABSTRACTModernpowersystemsinoperationhavetopossessthecapabilitytowithstandasctofpossiblesinglec【m廿】曙％ci锶．BymⅨu18ofpreventivecontrol，theoperatorswillshiftthecurrentworkingstatus舳mthealertregiontothenormalonewhereadequacyands∞urityarethusensured．Generationrescheduling,嬲aoomnlonmeasIlreofprevent

2、ivecontrol,hasbeenextensivelyaddressedforalongtime．Theearlyworksofdirectmethodsutilizedthequasi—linearityoftransientenergymat西niTEM)toapproximatethetransientstabilitylimits．whichopenedane豫ofthisarea．Asfhrastheprecisionisconcerned,thehybridmethodismuchmofeappealingtoconducttransientstability-c

3、onstrainedpreventivecontz01．Morenv盯，compared、珩thanotherkindofapproaches．namelyoptimalpowerflowwithtxansientstabilityconstraints，thehybridmethodadoptedinthisthesisismoreappealingtopracticalapplica=fiomThisthesisbrieflyreviewsthedefinitionoftransientenel-gyfunctionfiEF)indiremmethodsandthephysi

4、calconceptsinpotentialenergyboun&rysurface口EBS)approach,followedbyaviablestrategyforhybridmethodanalysis．Basedonthesegroundsthecharacteristicsofminilnutnkinetic饥盯影(幽areex岬ded．SuchaminimunlKEconlesfromallena'gytrajectoryofthepost-faultsystem,andisquasi-linearwiththemechanicalmputpoweroftheseve

5、relydisturbedmachineintwodistinctslopes．Thesegmentwithasmallslopecorrespondstotheconfigurationwherethepowersystemstaysstable；suchaminilnumKEiscalledinactiveKE．Thepointsonthedecliningsegmentmatchtheextraenolgythatthesystemfailstoconverttopotentialenergy口E)atthePEBS，whichiscalledactiveKE．Theinf

6、lexionofthetwosegmentsindicatesthegeneration1imit．Tonaakeuseofthisproperty,amethodologyisputupimplementingthefollowingfunctions：torecognizetheseverelydisturbedgenerators；tocalculatethesensitivityofminilnulnKEwithrespecttothemechanicalinputpowerofthesegenerators；toevaluatetheTEMbyahybridmethod

7、；andfinally,tocombinethemtogetherinaniterativeanalysisfi'amevcorlL—Acomputerpro蓼amiscompiledtoimplementsuchallalgorithm．MultipleoperationmodesandrepresentativemodelsareemployedontheIO-machine39-btmⅡNewEnglandtestpower町吲[emtodemonstratcthecorr