基于三维磁场测量的全并联at牵引网故障定位方法分析

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1、西南交通大学硕士研究生学位论文第1I页依靠安装在牵引变电所处的终端计算机分析实现故障区域定位、故障类型识别和故障点定位。对组成磁场测量单元的装置及功能进行了初步的设计，并详尽描述了单元内各装置之间的关系和工作流程。对所提出的系统进行的成木分析显示：工程造价便宜，具备了运用实施的可行性。论文从基础理论、方法分析到运用实现三方面对提出的基于三维磁场测量的牵引网短路故障定位方法进行了详细研究，建立了一个较为完备的体系，为全并联AT牵引网故障定位领域的研究提供了新思路。关键词：全并联AT牵引网；三维磁场测量；电流分布；短路故障定位：故障类型识别：故障测距；新型故障定位系统

2、AbstractAtpresent，thepassengerdedicatedlinesandintercityrailwaysinourcountryaremostdesignedaccordingtotheall·parallelATpowersupplysystem，whichareinlinewiththedevelopmenttrendofhighspeedandheavyloadoperatedonhigh．speedrailways．All。parallelATtractionnetworkisanimportantpartofthetraction

3、powersupplysystemofhigh·speedrailway,anditguaranteestheacceptedstreamoperationofelectriclocomotivetractionline．However,thetractionlinesoftenoccurshort-circuitfaultforiterectsandrunsinopenbutdifferentenvironments，andSOfar,thetraditionaltractionlinefaultlocationmethodscannotovercomethep

4、roblemoflowmeteringaccuracy．Withthedevelopmentofmeasurementtechnlologyformagneticfieldinrecentyears，theoperationstatusofthetractionlinecanbereflectedbythevarietyofthespacemagneticenvironmentofthetractionnetwork．Therefore，onthebasisofthis，thepaperfocusesonanA11．parallelATtractionnetwor

5、kfaultlocationmethodbasedonthethree．dimensionalmagneticfieldmeasurement．Themethodcannotonlyachievethefaultspanlocation，faulttypeidentificationandlocationwithinthespanfastandaccurately,buthasvastimportancetoshortentheoutagetimeandimprovereliability．Inviewoftheproblem，accordingtothefund

6、amentaltheoremofelectromagneticfieldinphysics，themagnetictheoreticalformulaoffinitelongstraightwireatanypointinspaceundertheCartesiancoordinatesiSderived．Fullyconsideringtheexclusivewirematerialoftractionnetworkandthecharacteristicsofanharmoniccircularcrosssection，andonthebasisofthetr

7、actionsystemmodelestablishedbyusingthefiniteelementanalysissoftwareAnsoft／Maxwell，themagneticfielddistributionsurroundedwithtractionlinesCanbesimulatedandanalyzed．Inthepaper,theconceptoftheWirecharacteristicspatialdistanceisexplainedindetail，onthefoundationofthis，thepaperrespectivelyr

8、esear