特高压串补线路潜供电弧特性与抑制措施-研究

特高压串补线路潜供电弧特性与抑制措施-研究

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时间:2019-02-19

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1、万方数据西南交通大学硕士研究生学位论文第1I页AbstractUHVtransmissionpowertechnologyeffectivelynotonlyreducestransmissionlosses,butsianexcellentwaytosavelandresourceandenhancethepowertransmissioncapability,ithasobviousadvantagesofsavingtheprojectinvestment.Withtheimprovingofpowersystem,eriescapacitorco

2、mpensatoriswidelyusedtoimprovethesystemstabilityandincreasetransmissioncapacityofpowerlines.transmissionlineadoptthesingle—poleauto—reclosuretoenhancethepowersystemstabilization,whentransmissionlinesingle—phasegroundfaultoccurs,selfextinctionsmoothlyofthesecondaryarcatfaultpoints

3、isanecessaryconditionforsingle—poleauto—reclosuresuccessful.becauseoftheexistenceofseriescompensationdevice,theextinctionofsecondaryarcaremorecomplexthanconventionalseriescompensationsystem,ifwedon’ttakeanymeasurestorestrictthesecondaryarcoccurrence,thesecondaryarcwillbedifficult

4、toextinguish,whichdirectlyaffectsthesystemstabilityandcircuitreliability,SOitisnecessarytodeeplystudyonthecharacteristicsofsecondaryarcandthefrequencycharacteristicsofsecondaryarccurrentandrecoveryvoltage.Firstly,theresearchstatusforUHVtransmissionPowertechnologyissummarizedinthi

5、spaper,thenintroducetheseriescompensationtechnologywillbeadoptedintransmissionlines,analyzesecondaryarCcurrentandrecoveryvoltageconceningoflineParameters.Thecapacitanceandinductanceofsecondaryarciscalculated.GeneratingmechanismofsecondaryArcandvariousinfluencefactorsofsecondaryar

6、ccurrentandrecoveryvoltageisrevealed.Secondly,thesingle—phasegroundfaultofUHVseriescompensatedtransmissionlinesisestablishedbyusingelectromagnetictransientsimulationsoftwareATPandPSCAD,andstudiedtheinfluencefactorsoncharacteristicsofsecondaryarcreferringtotheUHVsingle—circuit,dou

7、ble—circuittransmissionline,foundthatifthefaultpointapproachseriescompensationdevicewillenlargestheamplitudevalueofthesecondaryarccurrent.Theresultsshowthatvalueofthesecondarycurrentandrecoveryvoltagecanbeeffectivelylimitedbyusingtheparallelcompensationreactorswithsmallreactorand

8、HighSpeedGroundingSwitehes(HSGS).Thepape

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