特高压串补线路潜供电弧特性与抑制措施-研究

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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