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1、Chapter2PowerSystemModellingandSSRAnalysisMethodsAbstractNumerouswelldocumentedtoolsareavailableforpowersystemmod-ellingandanalysis.Thischapterwilldescribethemostdominantandcommonlyusedmethodstostudysubsynchronousresonancephenomenoninpowersystemnetworks.Sincethisphen
2、omenoniscloselyrelatedtotheoperationofturbogen-erators,thefundamentalstructure,andoperationofasynchronousmachineisalsoexplained.Withinthischapter,modelsforallofthemainpowersystemcompo-nents,includingexcitationsystems,powersystemstabilizers,transmissionlines,loads,syn
3、chronousmachineandturbinegeneratormechanicalsystemaredescri-bed.ThemodellingofLineCommutatedConverter,VoltageSourcedConverterbasedHVDCsystemandthyristorcontrolledseriescapacitorisalsoprovided.2.1SynchronousGeneratorsThemodellingandanalysisofthesynchronousmachinehasbe
4、ensubjectofinvestigationssince1920[1,2],severalmorestudiesinvestigatedthesamesubject[3–5].Manybooksalsocoveredtheoperationandperformanceofsynchronousmachines[1,6].Withinthissectionthebasicstructureandoperationofthesyn-chronousmachineisdescribed.Thesynchronousmachinei
5、sanACgenerator,drivenbyaturbinetoconvertmechanicalenergyintoelectricalenergy.Understandingofsynchronousmachineoperationandaccuratemodellingofitsdynamicperformanceareextremelyimportantinsubsynchronousstudies.Thetwomajorpartsofsynchronousmachineareferromagneticstructur
6、es.Thestationarypartwhichisbasicallyahollowcylinder,calledthestatororarmatureshowninFig.2.1a.Thearmaturehaslongitudalslotsinwhichtherearecoilsofthearmaturewindings.Thesewindingscarrythecurrentsuppliedtoanelectricalloadbyagenerator.Therotoristhepart(showninFig.2.1b)wh
7、ichismountedontheshaftandrotatesinsidethehollowstator.Thewindingontherotor,calledfieldwinding,carriesDCcurrentandproducesmagneticfieldwhichinducesalternating©SpringerInternationalPublishingSwitzerland201739A.Adrees,RiskBasedAssessmentofSubsynchronousResonanceinAC/DCSys
8、tems,SpringerTheses,DOI10.1007/978-3-319-44947-0_2402PowerSystemModellingandSSRAnalysisMethods(a)(b)Fig.2.1aEndviewofa26kV908MVA.bR
