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次同步谐振对汽轮发电机组轴系扭振冲击的研究 Title:StudyontheImpactofTorsionalVibrationsonSteamTurbineGeneratorSetsduetoSubsynchronousResonance Abstract: Thephenomenonofsubsynchronousresonance(SSR)canleadtoharmfultorsionalvibrationsinsteamturbinegeneratorsets.ThisresearchpaperaimstoinvestigatetheimpactoftorsionalvibrationscausedbySSRinsteamturbinegeneratorsets.ThepaperpresentsanoverviewofSSR,itscauses,andeffectsonthepowersystem.ItalsodiscussestheinfluenceofSSRontheshaftsystemandthemeasurestomitigatethetorsionalvibrations. 1.Introduction: Theintroductionprovidesabriefexplanationofthebackgroundandsignificanceoftheresearchtopic.IthighlightsthegrowingconcernregardingtorsionalvibrationsinsteamturbinegeneratorsetsduetoSSRandthepotentialrisksassociatedwithit. 2.SubsynchronousResonance: ThissectionexplainsthephenomenonofSSR,whichoccurswhenthenaturalfrequencyofthesystemcoincideswithasubsynchronousfrequencycomponentpresentinthepowersystem.ItexploresthecausesandmechanismsofSSR,includingtheinteractionbetweentheturbineandtheelectricalsystem. 3.EffectsofSSRonthePowerSystem: ThissectiondiscussestheelectricalandmechanicalconsequencesofSSRonthepowersystem.Ithighlightstheimpactonpowerquality,voltagestability,andsystemstability.Furthermore,itexplainsthepotentialdamagethatSSRcancausetothegeneratorandotherequipmentinthesystem. 4.ImpactofSSRontheShaftSystem: ThissectionfocusesontheinfluenceofSSRontheshaftsystemofthesteamturbinegeneratorsets.ItexplainshowSSRcaninducetorsionalvibrations,leadingtostressconcentrationsandpotentialfailureofcriticalcomponents.Theanalysisincludesthedeterminationofcriticalspeedsandresonanceconditions. 5.MitigationMeasuresforTorsionalVibrations: ThissectionpresentsvariousmitigationmeasurestominimizetheimpactoftorsionalvibrationscausedbySSR.Itincludesbothdesignandoperationalstrategies,suchastheuseoftorsionaldampingdevices,flexiblecouplings,andactivecontrolmethods.Italsoemphasizestheimportanceofsystemmodelingandanalysisinpredictingandpreventingtorsionalvibrations. 6.CaseStudies: Thissecti