资源描述：
《Paper - A contribution to teh voltage stability studies with》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、ProceedingsoftheWorldCongressonEngineering2007VolIWCE2007,July2-4,2007,London,U.K.AContributiontotheVoltageStabilityStudieswithinPowerSystems:SomeAspectsRelatedtotheLoadRepresentationJoséGeraldoB.M.deAndrade,HernánPrietoSchmidtcosts,guaranteeingthecompetit
2、ivenessamongcompaniesandAbstract-Thisworkinvestigatestheimpactoftheloadsavingthealreadyscarcenaturalresources.Thesefactsmakerepresentationuponapowersystemsecurityassessment.Thisispowersystemsoperatewithmorereducedstabilitymargins.doneaccordingtotwoimportan
3、taspects:theadopteddirectionSo,itisnecessarytoknowthepowersystemsoperationfortheloadincrementandthedynamicmodelsusedtorepresentlimitsinordertoguaranteequalityandsafetymarginstopoweritsbehavior.Thefirstaspectistackledthroughanevaluationofsystemsupplying.Amo
4、ngthelimitscommonlyinvestigatedcontingencies,whichisbasedonthesystem’sloadflowmodelfor(suchasthermaloverloadlimitsandangularinstability)voltagetwoloadincrementdirections:the“traditional”approach,whereinstabilitylimitisseenasoneoftheprominentthreatstothethe
5、systemactiveandreactiveloaddemandsareincreasedproportionallytothebasecase,andasecondapproachthatsafeoperationoftheelectricsystem[1]-[3].Thisisthereasonregardsthe“worstcase”,inwhichitisadoptedthedirectionthatwhyinthelastyearstherehavebeenissuedresearches[4]
6、ongivesthesmallest“local”loadingmarginforthebasecase.Thethistopic.Moreover,itisknownthatthedynamicbehaviorofsecondaspectistackledthroughasystemmulti-machinetheloadisthekeyelementforanumberofincidentsrelatedtomodellingthattakesintoaccounttheimpactofthegener
7、ators,voltageinstability(andcollapse)phenomenonobserved[3].loads,AutomaticVoltageRegulators(AVRs),OverExcitationThisworkinvestigatestheimpactofsomeaspectsrelatedtoLimiters(OXLs)andLoadTapChangers(LTCs)dynamictheloadrepresentationforthevoltagestabilityasses
8、sment.behavior.ThedynamicresponsesofthesystemarecomparedtoFromthestaticviewpoint,itisanalysedtheimpactofadoptingthemostcriticalcontingenciespreviouslyobtained.Somedifferentdirectionsfortheloadincrementtotheco
