第47卷第4期电网技术Vol.47No.42023年4月PowerSystemTechnologyApr.2023文章编号：1000-3673（2023）04-1450-10中图分类号：TM721文献标志码：A学科代码：470·40风电场双回送出线路时域故障测距新方法束洪春1,2，邓亚琪1,2璘，曹璞2，朱梦梦3，马御棠3，安娜2（1．昆明理工大学机电工程学院，云南省昆明市650500；2．昆明理工大学电力工程学院，云南省昆明市650500；3．云南电网有限责任公司电力科学研究院，云南省昆明市650217）NovelMethodofTime-domainFaultLocationforWindFarmDouble-circuitTransmissionLinesSHUHongchun1,2,DENGYaqi1,2,CAOPulin2,ZHUMengmeng3,MAYutang3,ANNa2(1.FacultyofMechanicalandElectricalEngineering,KunmingUniversityofScienceandTechnology,Kunming650500,YunnanProvince,China;2.FacultyofElectricPowerEngineering,KunmingUniversityofScienceandTechnology,Kunming650500,YunnanProvince,China;3.ElectricPowerResearchInstituteofYunnanPowerGridCo.,Ltd.,Kunming650217,YunnanProvince,China)ABSTRACT:Astheshort-circuitcurrentoutputfromthenewenergypowersupplyatthetimeofafaultpresentsthecharacteristicsoffrequencyshifting,highpercentageoftheharmoniccontent,restrictedamplitudes,unequalpositiveandnegativesequenceimpedances,etc.,resultingintherisksofthefaultlocationfailuresbasedonthepowerfrequency.Therefore,afaultlocationmethodfordouble-circuittransmissionlinesofawindfarmisproposed.Thetransmissionlineequationisdiscretizedwhichisexpressedintheformofpartialdifferentialequationsbyusingthefinite-differencetime-domain.Then,thetransmissionlineequationissolvedbyusingthemodifiedvariationaliterativemethodtoobtainthefunctionoflinelength,usingthephasevoltageandthephasecurrentatthebothendsofthelineastheboundaryconditions.Last,thefaultlocationisachievedbyconstructingthefaultlocationfunction.ThroughtheanalysisonthePSCAD/EMTDCandthehardware-in-the-looptestexperimentalplatform,theproposedalgorithmisverifiedtobeabletoaccuratelynotarizethefaultlocations.KEYWORDS:faultlocation;double-circuittransmissionlines;modifiedvariationaliterationmethod;windfarm摘要：由于故障时新能源电源输出的短路电流呈现出频率偏移、谐波含量占比高、...
