大规模电力系统低频振荡分析与广域自适应控制研究(5)

2025-06-15

山东大学博士学位论文

ABSTRACT

Withimplementationofthe‘'transmissionofelectricityfromthewesterntotheeasternregion”strategy,twobigandlong—chainACsynchronizedpowergridshavebeenformedinourcountryaccordingtoaseriesofinterconnectionprojects.Recently,‘'ultra-high—voltagefOHV)gridas

strategicalthebackbonegrid,coordinateddevelopmentofpowergridsatalllevels’’objectivehasbeenproposedbyStateGridCorporationofChina(SGCC).OnJanuary6,2009,the1000kVJindongnan-Nanyang-JingmenUHVACexperimentalpilotproject,which

hasbeenisresearched,developed,designedandconstructedindependentlybyChina,formallycompletedandputintooperation.Accordingtoplanning,‘'twoverticaltwohorizontal”UHVbackbonegridwill.beconstructedandanultra-large—scaleNorthChina—CentralChina EastChinaIⅢACsynchronizedpowergridwillbeformedbythebeginningofthe“TwelfthFive—Year’’.Bytheyeararound2020,astrongstructurewillbeformedforUHVpowergridofSGCC,whichtakestheNorthChina,CentralChinaandEastChinaasthe

hydropowerbases

Duringcore,andandmainoflinksmajorregionalpowergrids,largecoalbases.andlargeloadcenters.constructionOurcountry’Sultra-highvoltage(UHV)powergrid,both

tolowelectromagneticloopcircuitandstressedlongUHVtransmissionpassagemaylead

frequencypoweroscillation.Largescalepowersystemhasacharacteristicoflargescaleand

andvariableoperationcondition.Bothofthemchallengeexistinglowfrequencyanalysisoncontrolmethods.Therefore,studieslowfrequency

toanalysisandwide—areaadaptiveofexistingcontrolforlargepowersystem,whichisusedovercome

ashortcomingsanalysisandcontrolmethodsinpracticalapplications,hasgreatimportanceinenrichment

andextensionofpowersystemlowfrequencyoscillationanalysisand

betweencontroltheory,regionalpower

controlmethod

onpreventionblackoutandimprovementtransmissiononcapacitysystems.Basedononliteraturereviewofstudiesmechanism,analysisandsmalldisturbanceanglestability,thoroughstudiesandusefuldiscussions

adaptivecontrolstrategiesforlargelowfrequencyanalysismethodandwide—areapowersystem

havebeenmadeinthisdissertation.Themainresearchworkandinnovativefruitsareasfollows.

1)wm

onlyregardsortolimitationofconventionaleigenvaluesmallscaleanalysismethodholdstrueformiddlepowersystem,apracticalmethodforlargescaleinterconnected

IVpowersystemlowfrequencyoscillationanalysisisproposedbycombing


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