1、重慶大學碩士學位論文10kV配網單相接地故障小波選線方法研究姓名：董莉娜申請學位級別：碩士專業(yè)：電氣工程指導教師：盧繼平20090523英文摘要ABSTRACTBecausethecharacteristicsignalofsinglephase—groundedfaultof10kVdistributionnetworksystemisnotobvious，thefaultdetectionbasedonthesteadycurren

2、tofthefaultedlinemightbenotcorrectTherefore，thefaultdetectionbasedonthetransientsignalofthefaultdistributionnetworkhasbecomeoneofthekeytechiniquesBasedontheartofthestateofthefaultdetectiontechniquesforthesinglephase—grou

3、ndedfaultof10kVdistributionnetworksystemtheperformanceofthetransientzerosequencecurrentandvoltageinthethesingle—phasegrounded10kVdistributionnetworkWasanalyzedinthisthesisBasedonthesimulatingresultsofthetransientzerosequ

4、encecurrentandvoltagewithMatlabSimulinkplatformandaccordingtothecharacteristicsofbothtypicalrealandcomplexwavelettransform，theauthoranalyzedandcomparedtheapplicaionsofboththerealandthecomplexwavelettransforminthefaultdet

5、ectionofthesinglephasegroundedfaultof10kVdistributionnetworksystem，andproposedafaultdetectionmethodaccordingtotheperformancesofboththetransientzerocurrentsofanfeedersandthescalecoe伍cientsindexvaluesofthemultiscaledecompo

6、sitioninthewavelettransformBecauseofthedifficultyforthefaultdetectionofthetwotofourfeeder10kVdistributionnetworkbasedonthesimulatingresultsoftransientzerosequencecurrentforthesinglephase—groundedfaultforthefourfeeder10kV

7、distributionnetworkandbelowonMatlabplatform，thewavelettransformresultsofthetransientzerosequencecurrentwithfi姆realwaveletsincludingDbNseries，SymNseries，BiorNrNdseriesandCoifNseries，etcwereanalyzedAnditputforwardafaultdet

8、ectionmethodbasedonthetransientlowfrequencyzerosequencecurrent(ZSC)energyforthefirsttimewhichWascomparedwiththefaultdetectionmethodsbasedonboththetransienthi曲一frequencyZSCenergyorthemaximunmodulevalueForthefourfeeder10kV

9、distributionnetworkandbelowtheresultsshowsthatonlyfiverealwaveletssuchasSym3、Coif1，Bior24，Bior26andBior44Candetectthefaultedlinecorrectlywiththetransienthi曲frequencyZSCenergyandthemaximunmodulevaluecorrectlyandwimthelow—

10、frequencyhighscale—coefficientofthemultiscaledecompositionofwavelettransform，thefaultlineforbothNUSandNESnetworkcouldbelocatedcorrectlywhichiSnoteffectedwiththerealwaveletsandthefeedernumberofthenetworkTherefore，thispape