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《Thesis - Long term voltage stability analysis for small dist》由會員上傳分享，免費在線閱讀，更多相關(guān)內(nèi)容在學(xué)術(shù)論文-天天文庫。
1、LONGTERMVOLTAGESTABILITYANALYSISFORSMALLDISTURBANCESADissertationbyKUNMENSubmittedtotheOfficeofGraduateStudiesofTexasA&MUniversityinpartialfulfillmentoftherequirementsforthedegreeofDOCTOROFPHILOSOPHYDecember2007MajorSubject:ElectricalEngineeringLONGTERMVOLTAGEST
2、ABILITYANALYSISFORSMALLDISTURBANCESADissertationbyKUNMENSubmittedtotheOfficeofGraduateStudiesofTexasA&MUniversityinpartialfulfillmentoftherequirementsforthedegreeofDOCTOROFPHILOSOPHYApprovedby:ChairofCommittee,GarngM.HuangCommitteeMembers,DuLiWeipingShiChananSin
3、ghHeadofDepartment,CostasN.GeorghiadesDecember2007MajorSubject:ElectricalEngineeringiiiABSTRACTLongTermVoltageStabilityAnalysisforSmallDisturbances.(December2007)KunMen,B.S.,Xi’anJiaotongUniversity;M.S.,TsinghuaUniversityChairofAdvisoryCommittee:Dr.GarngHuangThi
4、sdissertationattemptstoestablishananalyticalandcomprehensiveframeworktodealwithtwocriticalchallengesassociatedwithvoltagestabilityanalysis:1.Tostudythenewcompetitiveenvironmentappropriatelyandgivemoreincentiveforreactivepowersupports,onehastoevaluatetheimpactsof
5、distributedmarketforcesonvoltagestability,whichcomplicatesthevoltagestabilityanalysis.2.Accuratelyestimatingvoltagestabilitymarginonlineisalwaysthegoaloftheindustry.Industryusedtoapplystaticanalysisforitscomputationspeedatthecostoflosingaccuracy.Ontheotherhand,d
6、ynamicanalysiscanresultinmoreaccurateestimation,butgenerallyhasahugecomputationcost.Soachallengeistoestimatethevoltagestabilitymarginaccuratelyandefficientlyatareasonablecost,especiallyforlargesystem.Consideringthefirstchallenge,thisdissertationappliedeigenvalue
7、basedbifurcationanalysistoallocatethecontributionofvoltagestability.Weinvestigatehowparametersofthesysteminfluencethebifurcations.Threebifurcations(singularityinducedbifurcation,saddle-nodeandHopfbifurcation)andtheirrelationshiptoseveralcommonlyusedcontrollersar
8、eanalyzed.Theirparameters’impactonthesebifurcationshavebeeninvestigated,fromwhichwefoundawaytoallocatethecontributionbyanalyzingtherelativepositionsofthebifurcations.
