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1、Abstractsingle—phasegroundedfaultsindifferentsectionsandanewfaultlocatingmethodispresentedforhybridtransmission1ineswhichmixedwithoverhcadlinesandcables．Themethodsynthesizessingle．terminalandtwo。terminalsdistanceameasurementtheorywhichiSunactedonthewavespeedinth
2、ecable．Fortheidentifiedhybridline，thefaultpointreflectingwaveisdetectedbythepolarityofaerialorgroundmodalmaximums，thensingle．terminaldistancemeasurementonthehybridlineisrealized；atthesametime，two。terminalsdistancemeasurementproceedonthebasisofthemomentsoftraveli
3、ngwavearrivingatbothterminals．Thussynthesizethetwopartsaforesaidtofigureupwavespeedonthecableonlineforimprovingrangeaccuracy．Thesimulationresultsshowthatthemethodsolvedthedifficultoftheconfirmofwavespeedonthecableandthedifferenceofwavespeedoncablesandoverh【cadli
4、nes，andthenimprovetheaccuracyoffaultlocationeffectively．Keywords：travelingwave；single-phasegrounded；faultlocation；distributionnetworkIII目錄摘要?????????????????????????????IAbstract．?．?．．?．．?．?．．．???．?．．．．．?．?．．?．??．?．?．?．???．．??．?．??．?．?．．．．II第1章緒論????????????????
5、???????????11．1課題的背景及其意義????????????????????一11．2故障定位技術(shù)研究現(xiàn)狀???????????????????．．21．3本文的研究?jī)?nèi)容??????????????????????．．4第2章樹(shù)型配電網(wǎng)絡(luò)故障定位研究?????????????????．62．1行波在樹(shù)型網(wǎng)絡(luò)中的傳播過(guò)程?????????????????62．2樹(shù)型網(wǎng)絡(luò)測(cè)距算法?????????????????????．．72．2．1樹(shù)型網(wǎng)絡(luò)故障測(cè)距????????????????????．72．2．2樹(shù)型網(wǎng)
6、絡(luò)故障支路的判定?????????????????．82．2．3樹(shù)型網(wǎng)絡(luò)測(cè)距步驟????????????????????92．3檢測(cè)信號(hào)及檢測(cè)裝置的選擇?????????????????．．102．4樹(shù)型網(wǎng)絡(luò)仿真???????????????????????．112．5本章小結(jié)?????????????????????????13第3章T型線路的故障定位研究??????????????????143．1現(xiàn)有測(cè)距方法的不足????????????????????143．2T型線路測(cè)距原理?????????????????
7、????一153．3T型線路測(cè)距算法??????????????????????163．3．1三端行波法??????????????????????：．163．3．2相量差法???????????????????????．．173．3．3T型線路測(cè)距步驟????????????????????193．5T型線路仿真???????????????????????一203．6本章小結(jié)?????????????????????????22第4章線．纜混合線路故障定位的研究???????????????一234．1混合線路行波
8、測(cè)距難點(diǎn)???????????????????234．2行波在混合線路中的傳播過(guò)程????????????????．234．3混合線路測(cè)距算法?????????????????????254．3．1故障點(diǎn)反射波波頭識(shí)別??????????????????254．3．2混合線路故障測(cè)距????????????????????27IV
