文档名：柔性互联输配一体化电网有损潮流的精细化建模及应用
摘要：多端柔性互联输配一体化电网内部的运行方式复杂、网损特性差异显著,导致传统一刀切的网损补偿方法难以准确刻画网损的实际情况,影响了输(配)电交直流有损潮流模型的应用潜力和输配边界潮流的一致性.为此,该文提出一种基于双层定点迭代的精细化有损潮流模型.针对网损补偿方法不准确的问题,综合考虑网络类型、数据属性和物理特征等因素,为输、配电网及交、直流电网的精准有损潮流分析建立了差异化的网损补偿模型.针对输配边界潮流的不一致问题,将输配一体化有损潮流建模为一个双层定点迭代问题,并采用主从分裂法实现协同求解.在多个算例中分析了不同有损潮流模型的性能差异及其原因,讨论了所提模型在求解精度、收敛速度和计算效率等方面的优势,验证了所提模型在不同控制方式和优化目标下的鲁棒性和通用性.
Abstract：Lossypowerflowmodelisanextensionofthelosslesslinearpowerflow(LPF)modelandhasbecomeoneofthemainstreammethodsforapproximationcalculationandanalysisinpowersystems.Mathematically,itisdefinedasafixed-pointiterativeproblemformulatedjointlybythelosslessLPFmodelandthenetworklossescompensationmodel.Currently,existingnetworklossescompensationmodelsareonlyorientedtosingle-region,single-voltagelevel,andsingle-typeofpowergrids,andmainlyfocusesonACtransmissiongrids.However,theoperationmodesoftheintegratedtransmissionanddistributiongridwithmulti-terminalflexibleinterconnectedarecomplex,andthenetworklossescharacteristicsvarysignificantly.Obviously,existingmodelswouldweakentheapplicabilityandeffectivenessofthelossypowerflowintheintegratedtransmissionanddistributiongrids,alsoleadtofurtherdeteriorationofthemismatchofthetransmissionanddistributionboundarypowerflow.Thereasonisthatconventionalnetworklossescompensationmodelscannotconsiderthesignificantdifferencesoflossescharacteristicscausedbythecomplexityofgrids,whichmakesitdifficulttoaccuratelyquantifytheimpactofthelossesonpowerflowerrorsatdifferentlevelsandtypesofgrids.Forthisreason,apreciselossypowerflowmodelbasedontwo-layerfixed-pointiterationisproposedinthispaper.Fortheproblemofinaccuratenetworklossescompensation,thispaperfullyconsidersthecharacteristicsofnetworkstructure,dataattributesandphysicalfeatures,andproposespreciselossypowerflowmodelsfortransmission,distribution,ACandDCgrids.First,thelosslessLPFmodelisformulatedforACandDCgrids.Second,differentiatednetworklossescompensationmodelsareproposedtomodifythenodepowerinjectionaccordingtothecharacteristicsofAC,DC,transmission,anddistributiongrids.Finally,themodifiednodepowerinjectionsarere-substitutedintothelosslessLPFmodelandsolvediterativelyuntilconvergence.Forthemismatchproblemoftransmission-distributionboundarypowerflow,theintegratedtransmissionanddistributionlossypowerflowisformulatedasatwo-layerfixed-pointiterativeproblem.Amongthem,theouterfixed-pointisthetransmission-distributionboundarynode,whichisusedtosolvethemismatchproblemofpowerflowbetweentransmissionanddistributiongrids,andthemaster-slavesplittingmethodisusedtosolvetheproblemcollaboratively.Forthetransmissiongridpowerflowcalculation,thedistributionnetworkisequatedtotheload,andtheboundarynodevoltageinformationissolved.Forthedistributionnetworkpowerflowcalculation,thetransmissiongridisequatedtothesource,andthevoltageinformationoftheboundarynodeisutilizedastheoperatingpointfortheslacknodeofthedistributionnetworktosolvetheboundarynodepowerinjection.Theinnerfixed-pointisnodevoltageinformationinthenetworktosolvetheAC/DClossypowerflowbasedontheproposednetworklossescompensationmodel.Theerrorsandreasonsfordifferentlossypowerflowmodelsareanalyzedinseveraltestcases,andcomparedintermsofsolutionaccuracy,convergencespeedandcomputationalefficiency.Theresultsshowthattheproposedpreciselossypowerflowmodelachieveshighercomputationalaccuracyunderbothdeterministicanduncertaintyscenarios.Inaddition,theproposedmodelisoverallbetterthantheexistingmodelintermsofconvergenceperformanceandhaslowercomputationalcomplexity.Finally,fordifferentcontrolstrategiesandoptimizationobjectives,theoptimizationerrorsoftheproposedmodelaresmallerthanthoseoftheconventionalmodels,implyingthattheproposedmodelcanprovideoperatorswithmorereasonableeconomicschedulingdecisions.
作者：王淏 谢开贵 邵常政 胡博 郑东Author：WangHao XieKaigui ShaoChangzheng HuBo ZhengDong
作者单位：输变电装备技术全国重点实验室(重庆大学)重庆400044
刊名：电工技术学报
Journal：TransactionsofChinaElectrotechnicalSociety
年，卷(期)：2024, 39(9)
分类号：TM744
关键词：柔性互联 输配一体化 潮流分析 网损补偿 定点迭代
Keywords：Flexibleinterconnection transmissionanddistributionintegration powerflowanalysis networklossescompensation fixed-pointiteration
机标分类号：TM721.1U441.5TN911.73
在线出版日期：2024年5月13日
基金项目：国家自然科学基金柔性互联输配一体化电网有损潮流的精细化建模及应用[
期刊论文] 电工技术学报--2024, 39(9)王淏 谢开贵 邵常政 胡博 郑东多端柔性互联输配一体化电网内部的运行方式复杂、网损特性差异显著,导致传统一刀切的网损补偿方法难以准确刻画网损的实际情况,影响了输(配)电交直流有损潮流模型的应用潜力和输配边界潮流的一致性.为此,该文提出一种基...参考文献和引证文献
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