直流输电系统金属回线行波故障测距方案设计大学论文.doc

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1、直流输电系统金属回线行波故障测距方案设计目录摘要IAbstractII第1章绪论11.1课题研究背景11.2课题研究现状31.3本文所做的工作及意义4第2章直流输电线路单端行波测距原理52.1直流输电线路行波传播过程52.1.1直流输电线路故障过程52.1.2直流输电线路故障暂态行波传播特点52.2单端行波测距原理72.3行波故障测距的关键技术问题92.3.1故障分量的提取92.3.2模变换102.3.3正反向行波的分离122.3.4行波浪涌到达时刻的确定132.4小结13第3章直流输电系统金属回线故障分析及仿真153.1引言153.2直流输电系统单极金

2、属回线运行方式下线路接地故障现象分析153.2.1极1线路A点发生接地故障时的现象153.2.2极2线路B点发生接地故障时的现象163.3仿真环境173.4故障仿真173.4.1极1线路A点发生接地故障173.4.2极2线路B点发生接地故障193.5小结20第4章直流输电系统金属回线行波故障测距方案设计214.1引言214.2故障测距系统的总体设计214.3故障测距装置的外接电路224.4行波故障测距装置23I4.4.1故障测距装置原理234.4.2信号调理电路244.4.3故障行波数据采集系统254.4.4GPS同步时钟模块264.5本章小结28第5章

3、结论29致谢30参考文献31IConcentsAbstractI1Threadtheory11.1Subjectresearchbackground11.2Statusquoofresearch31.3Theworkandthesignificanceofthispaper42SingleterminaltravelingwavefaultlocationforHVDCtransmissionline52.1TravelingwavepropagationofHVDCtransmissionline52.1.1DCtransmissionlinefaul

4、tprocess52.1.2TransienttravelingwavepropagationofHVDCtransmissionline52.2Principleofsingleendedtravelingwavefault72.3Thekeytechnologyoftravelingwavefaultlocation92.3.1Extractionoffaultcomponents92.3.2Modetransformation102.3.3Separationofpositiveandbackwardwaves122.3.4Determinatio

5、nofarrivaltimeoftravelingwavesurge132.4Summary133FaultanalysisandSimulationofthemetalloopinHVDCtransmissionsystem153.1Introduction153.2AnalysisonthefaultofthegroundingfaultintheoperationmodeofthesinglepolemetalloopofHVDCsystem153.2.1Phenomenonoftheoccurrenceofearthfaultinthepolar

6、1lineApoints153.2.2Phenomenonoftheoccurrenceofearthfaultinthepolar2lineBpoints163.3Simulationenvironment173.4Faultsimulation173.4.1TheApointofthe1lineisgroundfault173.4.2TheBpointofthe2lineisgroundfault193.5Summary204Designoftravelingwavefaultlocationschemeformetaltransmissionlin

7、einHVDCtransmissionsystem214.1Introduction214.2Theoveralldesignoffaultlocationsystem214.3Theexternalcircuitoffaultlocatingdevice22I4.4Travelingwavefaultlocatingdevice234.4.1Principleoffaultlocatingdevice234.4.2Signalconditioningcircuit244.4.3Faulttravelingwavedataacquisitionsyste

8、m254.4.4GPSsynchronizationclockmodule264