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ID:39412174
大小:299.60 KB
页数:9页
时间:2019-07-02
《Presentation - Long-term dynamics of power systems》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、Long-termdynamicsofpowersystemsIEATopicalExpertMeeting#449-10.11.2004DublinSannaUski&BettinaLemström2VTTTECHNICALRESEARCHCENTREOFFINLANDTypesofpowersystemsimulations´Steadystate–powerflow–voltagestabilityanalysis(PV-,VQ-curvesetc.)–faultcurrentcalculation´Longtermdyn
2、amics´Stability–impactoffaults,disturbancesonthepowersystem–largevoltageandfrequencyexcursions–alsounstablesituations´Electromagnetictransients–faults,switching-events,protection–localstudiesVTTPROCESSES3VTTTECHNICALRESEARCHCENTREOFFINLANDPhenomenaTimescaleResearchto
3、olsVTTPROCESSES4VTTTECHNICALRESEARCHCENTREOFFINLANDLongtermdynamics´realbehaviourofthepowersystemduringaperiodoftimerangingfromtensecondstohours´includes–electromechanicalrotortransients–turbineandboilerdynamics–protection–automation–centralisedcontrolleractions–load
4、change–powerplantandsystemoperatoractionsVTTPROCESSES5VTTTECHNICALRESEARCHCENTREOFFINLANDTool:PSS/E&Extendedtermdynamics-module´usesmainlysameinputasordinaryPSS/Edynamicmodelling´possibletoinclude–transformertapchangers–boilereffects–actionofexcitationlimiters–switch
5、ingofcapacitorsandreactors–restorationofloadsetc.´suitabletoolforstudying–secondarycontrol–powerplantdispatch–voltageandfrequencyvariations–transmissioncapacityandbottlenecksVTTPROCESSES6VTTTECHNICALRESEARCHCENTREOFFINLANDTool:PSS/E&Extendedtermdynamics-module´timest
6、episuser-definedandcanvaryduringthesimulation´threedifferentmodesdependingontimestepinordertoincludehigh-frequencycharacteristicsindifferentdegree:–forsmalltimestep(~halfcycle)–formediumtimestep(~threetosixcycles)–forlargetimestep(~0,15-0,2s)´additionalmodels:–Online
7、TapChanger–OnlinePhaseShifter–dcLineTapChanger–MaximumExitationLimitersVTTPROCESSES7VTTTECHNICALRESEARCHCENTREOFFINLANDSimulationexample´Sintef23-generatormodel–loadsat25nodesGGG–basecaseconsumption49.5GWG–loadsmodelledas–P:40%constantZ,GG60%constantIGGG–Q:100%consta
8、ntZGGGGGG´AdditionalwindpowerGGGG–5GWinmid-Norway–modelledasnegativeP-loadGG–100%constantpowerGGVTTPROCESSES8VTTTECHNICALRESEARCHCE
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