DC1500V牵引供电系统故障测距研究的中期报告

DC1500V牵引供电系统故障测距研究的中期报告Abstract摘要InDC1500Vtractionpowersupplysystem,accuratefaultlocationisthekeytoensuresafeandreliableoperationofthesystem.However,duetothecomplexityofthesystemandtheinfluenceofmanyfactors,therearestillsomedifficultiesinfaultlocation.Therefore,itisnecessarytocarryoutresearchonfaultlocationmethodsinDC1500Vtractionpowersupplysystem.ThisreportsummarizestheprogressoftheresearchonfaultlocationinDC1500Vtractionpowersupplysystem,includingtheanalysisofthesystemcharacteristicsandtheselectionoffaultlocationmethods,andintroducesthepreliminaryresultsoffaultlocationexperiments.在DC1500V牵引供电系统中，精确的故障定位是确保系统安全可靠运行的关键。然而，由于系统的复杂性以及诸多因素的影响，故障定位仍存在一定的难度。因此，有必要对DC1500V牵引供电系统的故障定位方法进行研究。本报告总结了DC1500V牵引供电系统故障定位研究的进展，包括系统特性分析和故障定位方法的选择，并介绍了故障定位实验的初步结果。Keywords关键词DC1500Vtractionpowersupplysystem，faultlocation，distancemeasurement,experimentalstudy,systemanalysisDC1500V牵引供电系统，故障定位，距离测量，实验研究，系统分析。Introduction概述TheDC1500Vtractionpowersupplysystemisanimportantpartofurbanrailtransitsystems.Accuratefaultlocationiscriticaltoensurethesafeandreliableoperationofthesystem.However,duetothecomplexityofthesystem,theinfluenceofvariousfactors,andthelimitationsoftraditionalfaultlocationmethods,itisstilldifficulttoaccuratelylocatethefaultsinthesystem.Therefore,itisnecessarytocarryoutresearchonfaultlocationmethodsintheDC1500Vtractionpowersupplysystem.TheresearchonfaultlocationintheDC1500Vtractionpowersupplysystemmainlyincludessystemanalysis,faultlocationmethodselection,andexperimentalstudy.Throughtheanalysisofthesystemcharacteristics,theselectionoffaultlocationmethodscanbecarriedouttoimprovetheaccuracyoffaultlocation.Basedontheselectedmethods,experimentalstudiescanbecarriedouttoverifytheeffectivenessofthemethodsinpracticalapplications.ThisreportsummarizestheprogressoftheresearchonfaultlocationintheDC1500Vtractionpowersupplysystem,includingsystemanalysis,faultlocationmethodselection,andexperimentalstudy.SystemAnalysis系统分析TheDC1500Vtractionpowersupplysystemconsistsofpowersupplyequipment,transmissionequipment,andtractionequipment.Thepowersupplyequipmentprovidespowerfortheentiresystem,thetransmissionequipmenttransportsthepowertothetractionequipment,andthetractionequipmentfinallyprovidesthetractionforceforthetrain.TherearemanyfactorsthataffectthefaultlocationaccuracyintheDC1500Vtractionpowersupplysystem,includingthelengthoftheline,thetypeoffault,theinterferenceofotherequipment,andsoon.Therefore,itisnecessarytoanalyzethesystemcharacteristicsandselectappropriatefaultlocationmethodstoachieveaccuratefaultlocation.FaultLocationMethodSelection故障定位方法选择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实验研究Inordertoverifytheeffectivenessoftheselectedfaultlocationmethods,experimentswerecarriedoutonaDC1500Vtractionpowersupplysystem.TheexperimentalresultsshowthattheDTSmethodandtheHFCmethodhavegoodaccuracyinfaultlocation,andtheWPTmethodneedsfurtherimprovementinthealgorithm.Conclusion结论Throughtheanalysisofthesystemcharacteristics,appropriatefaultlocationmethodscanbeselectedtoimprovetheaccuracyoffau