DC1500V牽引供電系統(tǒng)故障測(cè)距研究的中期報(bào)告

DC1500V牽引供電系統(tǒng)故障測(cè)距研究的中期報(bào)告Abstract摘要InDC1500Vtractionpowersupplysystem,accuratefaultlocationisthekeytoensuresafeandreliableoperationofthesystem.However,duetothecomplexityofthesystemandtheinfluenceofmanyfactors,therearestillsomedifficultiesinfaultlocation.Therefore,itisnecessarytocarryoutresearchonfaultlocationmethodsinDC1500Vtractionpowersupplysystem.ThisreportsummarizestheprogressoftheresearchonfaultlocationinDC1500Vtractionpowersupplysystem,includingtheanalysisofthesystemcharacteristicsandtheselectionoffaultlocationmethods,andintroducesthepreliminaryresultsoffaultlocationexperiments.在DC1500V牽引供電系統(tǒng)中，精確的故障定位是確保系統(tǒng)安全可靠運(yùn)行的關(guān)鍵。然而，由于系統(tǒng)的復(fù)雜性以及諸多因素的影響，故障定位仍存在一定的難度。因此，有必要對(duì)DC1500V牽引供電系統(tǒng)的故障定位方法進(jìn)行研究。本報(bào)告總結(jié)了DC1500V牽引供電系統(tǒng)故障定位研究的進(jìn)展，包括系統(tǒng)特性分析和故障定位方法的選擇，并介紹了故障定位實(shí)驗(yàn)的初步結(jié)果。Keywords關(guān)鍵詞DC1500Vtractionpowersupplysystem，faultlocation，distancemeasurement,experimentalstudy,systemanalysisDC1500V牽引供電系統(tǒng)，故障定位，距離測(cè)量，實(shí)驗(yàn)研究，系統(tǒng)分析。Introduction概述TheDC1500Vtractionpowersupplysystemisanimportantpartofurbanrailtransitsystems.Accuratefaultlocationiscriticaltoensurethesafeandreliableoperationofthesystem.However,duetothecomplexityofthesystem,theinfluenceofvariousfactors,andthelimitationsoftraditionalfaultlocationmethods,itisstilldifficulttoaccuratelylocatethefaultsinthesystem.Therefore,itisnecessarytocarryoutresearchonfaultlocationmethodsintheDC1500Vtractionpowersupplysystem.TheresearchonfaultlocationintheDC1500Vtractionpowersupplysystemmainlyincludessystemanalysis,faultlocationmethodselection,andexperimentalstudy.Throughtheanalysisofthesystemcharacteristics,theselectionoffaultlocationmethodscanbecarriedouttoimprovetheaccuracyoffaultlocation.Basedontheselectedmethods,experimentalstudiescanbecarriedouttoverifytheeffectivenessofthemethodsinpracticalapplications.ThisreportsummarizestheprogressoftheresearchonfaultlocationintheDC1500Vtractionpowersupplysystem,includingsystemanalysis,faultlocationmethodselection,andexperimentalstudy.SystemAnalysis系統(tǒng)分析TheDC1500Vtractionpowersupplysystemconsistsofpowersupplyequipment,transmissionequipment,andtractionequipment.Thepowersupplyequipmentprovidespowerfortheentiresystem,thetransmissionequipmenttransportsthepowertothetractionequipment,andthetractionequipmentfinallyprovidesthetractionforceforthetrain.TherearemanyfactorsthataffectthefaultlocationaccuracyintheDC1500Vtractionpowersupplysystem,includingthelengthoftheline,thetypeoffault,theinterferenceofotherequipment,andsoon.Therefore,itisnecessarytoanalyzethesystemcharacteristicsandselectappropriatefaultlocationmethodstoachieveaccuratefaultlocation.FaultLocationMethodSelection故障定位方法選擇IntheDC1500Vtractionpowersupplysystem,therearemanytraditionalfaultlocationmethods,suchastimedomainreflectometry(TDR),frequencydomainreflectometry(FDR),andwavelettransform.However,thesemethodshavelimitationsintermsofaccuracyandefficiencyinfaultlocationintheDC1500Vtractionpowersupplysystem.Therefore,somenewfaultlocationmethodsaredeveloped.Inthisreport,threenewmethods,whicharewidelyusedinrecentyears,areintroduced.1.Distributedtemperaturesensingtechnology(DTS)TheDTStechnologycanbeusedtomeasurethetemperatureofthecable.Whenthereisafaultinthecable,thetemperaturemayrise,whichcanbeusedasacharacteristicparameterforfaultlocation.2.High-frequencycurrentmethod(HFC)TheHFCmethoduseshigh-frequencysignalstodetectthefaultinformationinthecable.Thefaultpointcanbelocatedbyanalyzingthechangesinthecurrentwaveform.3.Waveletpackettransform(WPT)TheWPTmethodusesawaveletpackettodecomposethesignalandextractthecharacteristicparametersofthefault.Bycomparingthecharacteristicparametersofthefaultatdifferentpositions,thefaultpointcanbelocated.ExperimentalStudy實(shí)驗(yàn)研究Inordertoverifytheeffectivenessoftheselectedfaultlocationmethods,experimentswerecarriedoutonaDC1500Vtractionpowersupplysystem.TheexperimentalresultsshowthattheDTSmethodandtheHFCmethodhavegoodaccuracyinfaultlocation,andtheWPTmethodneedsfurtherimprovementinthealgorithm.Conclusion結(jié)論Throughtheanalysisofthesystemcharacteristics,appropriatefaultlocationmethodscanbeselectedtoimprovetheaccuracyoffau