Discussion on Fault Source Locating Method of Voltage Sags in Distribution Network

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1、2018ChinaInternationalConferenceonElectricityDistributionTianjin,17-19Sep.2018DiscussiononVoltageSagSourceLocatingMethodinDistributionNetworkDUXIAOTONG1，SUNHAOTIAN1,YIHAO1，ZHUOFANG1,LUOSHANSHAN2,ZHANGJUN3，WANGXINXIANG4，LIYONGHENG41.Xi’anJiaotongUniversity,Shaanxi,Xi’an,7100492.Jiangsu

2、ElectricPowerCompanyResearchInstitute,Jiangsu,Nanjing,2100003.StateGridJiangsuElectricPowerCooperation,Jiangsu,Nanjing,2100004.GoldenCooperateinformation&automationtechnologyCo.,Ltd,Nanjing,210000different.Therefore,thecollectedinformationhavedifferentAbstract—Thispaperanalyz

3、esdifferentvoltagesagsourcelimits.Currently,therearetwomainstreammonitoringdeviceslocatingmethodsbasedondifferentmonitoringdevices,includingusedinChina'spowerdistributionnetwork.Oneisarelativelythemethodsforfaultsourcetracingbasedonpowerqualityexpensivepowerqualitymonitoringd

4、evicethatcanmonitormonitoringdevice,andthefaultsourcelocatingmethodbasedonandrecordmultipleinformationincludingvoltageandcurrent,voltagesagmonitoringdevice.Thisanalysiswouldbeaguideforandtheotherisavoltagesagmonitorthatcanonlyrecordmonitoringdeviceallocation.Inparticular,aclearsummary

5、ofthestepsofdifferentpositioningmethodsisperformed.Onthisbasis,instantaneousvoltageinformation.Basedonthis,faultlocationthenecessarygridnetworktopologyandsaginformationformethodsaredividedintofaultsourcetracingbasedoncurrentdifferentlocatingmethodsarefurtherelaborated.Atthesameandpowe

6、rinformation,andfaultsourcepositioningbasedontime,differentlocatingmethodsarecomparedintermsoffaultvoltageinformation.Knowingthemonitoringdevicerequiredtolerance,accuracy,andrapidity.Finally,prospectsoffuturebyeachmethodishelpfulforthemonitorallocationintheworkaregiven.distributionnet

7、workconstruction.IndexTerms—voltagesag,sourcelocation，monitoringdevice，reviewII.METHODSBASEDONPOWERQUALITYMONITORINGI.INTRODUCTIONDEVICEHEvoltagesageventisdefinedasthepowerqualityPowerqualitymonitoringdeviceprovidesvoltageandcurrentTproblemwhenrmsvalueoftheACvoltagedropsunder0.9inform

8、ation,thusbasedonthepower