Thesis - Network reconfiguration for loss reductio in three-

《Thesis - Network reconfiguration for loss reductio in three-》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、NETWORKRECONFIGURATIONFORLOSSREDUCTIONINTHREE-PHASEPOWERDISTRIBUTIONSYSTEMSAThesisPresentedtotheFacultyoftheGraduateSchoolofCornellUniversityinPartialFulfillmentoftheRequirementsfortheDegreeofMasterofSciencebyRayDanielZimmermanMay1992©RayDanielZimmerman1992ALLRIGHTSRES

2、ERVEDABSTRACTPowerdistributionsystemstypicallyhavetieandsectionalizingswitcheswhosestatesdeterminethetopologicalconfigurationofthenetwork.Thesystemconfigurationaffectstheefficiencywithwhichthepowersuppliedbythesubstationistransferredtotheload.Powercompaniesareinter-ested

3、infindingthemostefficientconfiguration,theonewhichminimizestherealpowerlossoftheirthree-phasedistributionsystems.Inthisthesisthenetworkreconfigurationproblemisformulatedassingleobjectiveoptimizationproblemwithequalityandinequalityconstraints.Theproposedsolutiontothisprobl

4、emisbasedonageneralcombinatorialoptimizationalgorithmknownassimulatedannealing.ToensurethatasolutionisfeasibleitmustsatisfyKirchhoff’svoltageandcurrentlaws,whichinathree-phasedistributionsystemcanbeexpressedasthethree-phasepowerflowequations.Thederivationoftheseequatio

5、nsispresentedalongwithasummaryofrelatedthree-phasesystemmodeling.Thesimulatedannealingalgorithmisdescribedinageneralcontextandthenappliedspecificallytothenetworkreconfigurationproblem.Alsopre-sentedhereisadescriptionoftheimplementationofthissolutionalgo-rithminaClanguag

6、eprogram.ThisprogramwastestedonaSunworkstation,givenanexamplesystemwith147busesand12switches.Thealgorithmconvergedtotheoptimalsolutioninamatterofminutesdemonstratingthefeasibilityofusingsim-ulatedannealingtosolvetheproblemofnetworkreconfigurationforlossreductioninathre

7、e-phasepowerdistributionsystem.Theseresultspro-videthebasisfortheextensionofexistingmethodsforsingle-phaseorbal-ancedsystemstothemorecomplexandincreasinglymorenecessarythree-phaseunbalancedcase.BiographicalSketchRayDanielZimmermanwasborninEphrata,PAonDecember17,1965.F

8、ouryearslaterhemovedwithhisfamilytoachickenfarminruralLan-casterCounty,PAwhereheliveduntilhebeganstudyingElectricalEngi-neer