www.eage.com.cn2023年4月·|65ApplicationResearch|应用研究基于FTU的小电流接地系统单相接地故障保护配置策略研究基于FTU的小电流接地系统单相接地故障保护配置策略研究徐春营1，赖悦2，陈鉴庆2，朱毅1，邱日强2（1.国网南昌市进贤县供电公司江西南昌331700；2.国网南昌供电公司江西南昌360100）摘要：目前，我国处理配电网接地故障仍以人工拉路的方式为主，使用该方式排查故障会出现大面积停电，排查效率低下，易造成经济损失，如何将故障点快速定位并就地隔离是解决该问题的关键。提出一种基于配电开关监控终端（FeederTerminalUnit，FTU）的10kV馈线零序保护整定策略，在该策略下对线路上FTU的零序保护定值根据其开关的安装点位进行整定，使各FTU互相配合，达到故障定位和隔离的目的。经过理论计算和配电网真实案例的验证，该策略的应用能有效利用FTU对接地故障进行定位和就地隔离，提高了接地故障的排查效率。关键词：FTU；10kV配电线路；继电保护；小电流接地；配置策略ResearchonsinglephasegroundingfaultprotectionconfigurationstrategyofsmallcurrentgroundingsystembasedonFTUXUChunyin1，LAIYue2，CHENJianqing2，ZHUYi1，QIURiqiang2（1.StateGridJiangxiJinxianPowerSupplyCo.,Ltd.,Nanchang331700,China;2.StateGridNanchangPowerSupplyCompanyCo.,Ltd.,Nanchang360100,China）Abstract:Atpresent,thehandlingofdistributionnetworkgroundingfaultinourcountryisstillmainlybyartificialpullroad.Usingthismethodtotroubleshootfaultswillleadtolargeareapowerfailure,lowefficiencyandeasytocauseeconomicloss.Howtoquicklylocatethefaultpointandisolateitinplaceisthekeytosolvethisproblem.Thispaperproposesazero-sequenceprotectionsettingstrategyfor10kVfeederbasedonfeederterminalunit(FTU).Underthisstrategy,thezero-sequenceprotectionsettingvalueofFTUonthelineissetaccordingtotheinstallationpointofitsswitch,sothateachFTUcancooperatewitheachothertoachievethepurposeoffaultlocationandisolation.Throughtheoreticalcalculationandrealcaseverificationofdistributionnetwork,theapplicationofthisstrategycaneffectivelyuseFTUtolocateandisolategroundfaults,andimprovetheefficiencyoftroubleshootinggroundfaults.Keywords:FTU;10kVtransmissionlines;relayprotection;smallcurrentgrounding;configura...
