電力系統(tǒng)暫態(tài)穩(wěn)定性分析及預(yù)防控制

1、東北大學(xué)碩士學(xué)位論文電力系統(tǒng)暫態(tài)穩(wěn)定性分析及預(yù)防控制姓名：任普春申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：電氣工程指導(dǎo)教師：于錫純20050801AbstractThetraditionalmethodsoftransientstabilityanalysishavesomeinevitableflawinpowersystem，SOtheanalysishasseldomgreatbreakoutinprecisionandvelocityWithth

2、edevelopmentofnonlinearsystemtheoryrecently，manyscholarsappliednewtheoriesinnonlinearsystemtopowersystemandacquiredsomeachievementsBasedontheanalysisoftransienttransitionprocedureofpowersystem，thispapermakesin—depthresea

3、rchinapplyingNormalFormmethodtoanalyzingpowersystemtransientstabilityBymeansofNormalForm，originalsystemstabilityboundarynearcontrollingunstableequilibriumcarlbevariedintoZspace，andbecomeasuperplanezi=0(icorrespondstotheu

4、niquepositiveeigenvalue)BecauseNormalFormmethodcantransformdifferentialequationarraythatdescribedoriginalsystemintodifferentialequationarrayoflinearsysteminZspace，eachvariablemaybeexpressedanalyticallyThen，everyvariable’

5、SanalyticalexpressioninoriginalsystemspacecanbeobtainedbymeansofNormalFormmethodandtheyarealgebraicequationarrayaboutvariablezj，z2Z。Inaddition，stabilityboundarycorrespondstoformulazi=0，therefore，thelocalstabilityboundary

6、inoriginalsystemspacecanbegainedInaone—machineinfinite—bussystem，thestabilityboundaryaccordswiththatacquiredbymeansofTransientEnergyFunctionmethodnearthecontrollingunstableequilibrium，SONormalFormmethodisveryvalidondeter

7、miningstabilityboundaryThepaperalsopresentsamethodofdeterminingthecriticalclearingtimebyjudgingwhentrajectoryonfaultwillintersectwithstabilityThismethodisfeasibleinthetheoryandisvalidintheresultIfafaulthappensinpowersyst

8、em，whenweacquireitscriticalclearingtime，bycomparingthistimewithactualclearingtime，wemayjudgewhetherpowersystemcanbestablyinoperationafterthefaultisclearedMoreover，wecanobtaintimeabundance，whichisintuitiveinmeasuringstabi