基于最优注入流的三相不平衡电流治理方法与实验-研究

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1、重庆大学硕士学位论文著提高的效果，具有更好的收敛性和优化性能。关键词：最优注入流，不平衡电流，逆向方法，节能降损，电能质量II英文摘要ABSTRACTNowadays,thereisagreatdealofunbalancedthree-phaseloadinmediumandlowervoltagedistributionsystemofChina,whichleadstothelong-timeunbalancedoperationofdistributiontransformer.Unbalancedcurrentcaus

2、edbythisseriouslyaffectsthesafetyandeconomicoperationofpowersystemandcausesahugepowerloss.Currentlyexistingmethodsusuallyusesusceptancecompensationtheorytogovernunbalancedthree-phasecurrent,buttheefficiencyofequipmentislimitedbecauseofhighdemandforcompensation,whichr

3、esultsfromthatthecontroltargetissettoensurethatthesystem’spowerfactorbeimprovedto1andunbalancefactorbereducedto0.Furthermore,thewaythatcompensationequipmentgovernsunbalancedthree-phasecurrentisswitchingcontrol,andtheequipment’sservicelifeandlossarecloselyrelatedtoits

4、operationtimes.However,thosemethodshaven’ttakenthelimitofoperationtimesintoconsideration,whichleadstohighcostandlowgoverneffect.Aimingatthedisadvantagesofsusceptancecompensationtheory,thisthesiswilldoresearchongovernancemethodofunbalancedthree-phasecurrentfromthepers

5、pectiveofinversemethod,theconcreteresearchcontentisasfollows:①Proposeagovernancemethodofunbalancedthree-phasecurrentbasedonoptimalinjectionflow,innovativelyintroducedinjectionflowtothegovernanceofunbalancedthree-phasecurrent.Constructtheobjectivefunctionwhichcanrepre

6、sentpowerqualityparametersinneedofgovernance,inverselyfindsusceptancecompensationcapacityneededwithnetworkanalysisandmathematicalmethod.Inconsiderationofinconvenienceofusinginductancecompensation,makefurtheroptimizationongovernancemethodofunbalancedthree-phasecurrent

7、basedonoptimalinjectionflow,dogovernancewithfullcapacitancemethodbyintroducingconstraintsofpowerfactorandovercompensationandtakinguseofinductivereactivepowerfromloadinthepremiseofgoverneffect,sothattheinductancecompensationwillbeavoided;②Makesimulationexperimentongov

8、ernancemethodofunbalancedthree-phasecurrentbasedonoptimalinjectionflowwithdatacollectedfromdistributiontransformer.Theresultsshowst