文档名：考虑转供与重构协同的多端柔性互联配电网供电恢复策略
摘要：柔性互联装置(FID)实现配电网不同馈线之间的柔性互联,可实现故障后配电网的快速恢复供电.该文以含直流网络的四端柔性互联配电网为研究对象,提出基于FID和网络重构的多端柔性互联配电网两阶段供电恢复策略.首先,在分析FID运行模式工作原理的基础上,提出了故障快速转供的FID平滑控制结构和考虑开关同期并网控制虚拟同步发电机(VSG)控制策略,支撑故障后第一阶段FID的快速供电恢复;然后,通过建立和求解考虑联络开关和FID容量限制的全局优化模型得出FID与网络重构相结合的第二阶段供电恢复策略,更大限度地恢复失电负荷;最后,利用PSCAD/MTDC仿真软件搭建了一个58节点四端含直流网络的柔性配电系统进行仿真验证.结果表明,所述供电恢复策略不仅能实现部分负荷的不停电转供,还能够通过网络重构大幅提高负荷恢复水平.
Abstract：Withthedevelopmentsofthe"dualcarbon"goalandacceleratedenergytransformation,ahighproportionofnewenergyandlarge-scalenewloadintegration,aswellasthewidespreadapplicationofflexiblepowerelectronicequipment,haveputforwardhigherrequirementsforthemorphology,structure,operationcontrol,andpowerqualityoftheexistingdistributionnetwork.Flexibleinterconnectiondevice(FID)enablesflexibleinterconnectionbetweendifferentfeedersinthedistributionnetwork,enablingrapidrestorationofpowersupplyafterfaults.Atpresent,thepowerrecoverystrategyforFIDistodirectlyprovidethecontrolstrategyforthecorrespondingscenario,operatingstatusoftheFID,andthefinaloperatingstatusofvariousswitches.ThereislittleresearchonthecoordinatedcontrolofmultiterminalFIDs,supportforpowersupplyrecoverycontrolstrategies,dynamicprocessofpowersupplyrecoveryindistributionnetworksbasedonFIDs,andcollaborativecooperationbetweenFIDsandvariousmechanicalswitches.Toaddresstheseissues,thispapertakesthefour-terminalflexibleinterconnectiondistributionnetworkwithDCnetworkasthecasestudy,andproposesatwo-stagepowersupplyrestorationstrategyformulti-terminalflexibleinterconnectiondistributionnetworkbasedonFIDandnetworkreconfiguration.Firstly,basedontheoperationprincipleofFID,thesmoothingcontrolstructureforFIDwithfastpowertransferunderfaultconditions,andtheVSGcontrolstrategyconsideringtheswitchingsimultaneousgridconnectioncontrol,areproposedtosupportthefastpowersupplyrestorationinthefirststageafterafault.Then,asecond-stagepowerrestorationstrategycombiningFIDandnetworkreconfigurationisderivedbybuildingandsolvingaglobaloptimizationmodelconsideringcontactswitchingandFIDcapacitylimitation,whichrestoresthelostloadstoalargerextent.Finally,a58-nodefour-terminalflexibledistributionsystemwithDCnetworkisconstructedbyusingPSCAD/MTDCsimulationsoftwareforsimulationverification.Theresultsshowedthatthroughtheproposedtwo-stagefaultrecoverystrategy,theimportantloadofthefaultnetworkwasincreasedby0.05%afteroptimization,andthegeneralloadwasimprovedby9.61%afteroptimization.Thetotalrecoverysituationwasimprovedby7.07%.Thisfullydemonstratestheeffectivenessoftheproposedmethod.Thefollowingconclusionscanbeobtainedfromthispaper.(1)Theproposedtwo-stagepowerrestorationstrategycombiningFIDandnetworkreconfigurationcannotonlysupportseamlesspowertransferoflostloads,butalsorealizeawiderrangeoflostloadsrestoration.(2)Theproposedfaultsmoothswitchingcontrolwithmodeswitchingcansmoothlyandquicklycompletethepowerrestorationafterafaultoccurs,andguaranteethenon-stoptransferofsomeloads.(3)TheproposedVSGcontrolstrategyconsideringsynchronousgridconnectionofswitchescaneffectivelyavoidtheinrushcurrentattheinstantofswitchclosurewhenswitchingfromoff-gridtogrid-connectedoperationafterfaultremoval,andalsoavoidtheinrushcurrentgeneratedbyfrequentswitchingofthecontactswitchesunderpowerduringtheoptimizationphaseofnetworkreconfiguration.Thetwo-stagerecoverystrategyproposedinthispapercanachieveawiderrangeoffaultrecovery,butthefocusofthispaperisontherecoverystrategyandprocess,anditdoesnotinvolvethestudyofhowtomakeuseoftheactiveregulationcapabilityofFIDtoachievethedetailedcontinuousstatetransferandactionsequenceofnear-zero-powerswitchingofthecontactswitch,whichwillbestudiedindetailinourfuturework.
作者：徐玉韬 冯起辉 谈竹奎 张超 袁旭锋 Author：XuYutao FengQihui TanZhukui ZhangChao YuanXufeng
作者单位：贵州电网公司电力科学研究院贵阳550025贵州大学电气工程学院贵阳550025
刊名：电工技术学报
Journal：TransactionsofChinaElectrotechnicalSociety
年，卷(期)：2024, 39(9)
分类号：TM721.3
关键词：柔性互联配电网 供电恢复 网络重构 虚拟同步发电机 开关同期并网控制
Keywords：Flexibleinterconnecteddistributionnetwork powersupplyrestoration networkreconstruction virtualsynchronousgenerator grid-connectioncontrolwithswitchsynchronous
机标分类号：TM76TM464TM341
在线出版日期：2024年5月13日
基金项目：中国南方电网公司重点科技项目，国家重点研发计划考虑转供与重构协同的多端柔性互联配电网供电恢复策略[
期刊论文] 电工技术学报--2024, 39(9)徐玉韬 冯起辉 谈竹奎 张超 袁旭锋柔性互联装置(FID)实现配电网不同馈线之间的柔性互联,可实现故障后配电网的快速恢复供电.该文以含直流网络的四端柔性互联配电网为研究对象,提出基于FID和网络重构的多端柔性互联配电网两阶段供电恢复策略.首先,在分析...参考文献和引证文献
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