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ID:15293749
大小:134.50 KB
页数:159页
时间:2018-08-02
《基于内网实测信息的多端口外网静态等值方法》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、基于内网实测信息的多端口外网静态等值方法基于内网实测信息的多端口外网静态等值方法#余娟1,朱柳1,颜伟1,赵霞1,卢建刚2,郭文鑫2*510152025303540(1.输配电装备及系统安全与新技术国家重点实验室重庆大学电气工程学院,重庆400030;2.广东电网公司电力调度通信中心,广州510600)摘要:现有的基于内网信息估计多端口外网等值参数的方法需要内网支路开断前后的状态信息,所需条件苛刻难以应用于实际。本文在外网信息完全未知的情况下,提出了基于内网实测信息的多端口外网静态等值方法,以估计多端口外网等值网络及其参数。本文方法所需的内网实测信息并不要求内网支路开断
2、,而是利用外网等值参数与内网实测信息之间的约束关系,采用两阶段估计方案,建立多端口外网等值参数的量测方程及其两阶段的最小二乘模型,从而利用最小二乘法求解得到多端口外网等值网络参数。IEEE-39节点系统和广东电网的仿真结果表明,所提方法可以有效地提高内网静态安全分析的精度。关键词:静态安全分析;外网静态等值;多端口;最小二乘;内网实测信息中图分类号:TM732Multi-portExternalNetworkStaticEquivalentonthebasisofInternalNetworkMeasuredInformationYUJuan1,ZHULiu1,YANWei
3、1,ZHAOXia1,LUJiangang2,GUOWenxin21.StateKeyLaboratoryofPowerTransmissionEquipment&SystemSecurityandNewTechnologyCollegeofElectricalEngineering,ChongqingUniversity,Chongqing400030China;2.GuangdongElectricPowerDispatchingCenter,Guangzhou510600ChinaAbstract:Existingmulti-portexternalnetworkeq
4、uivalentparameterestimationmethodsbasedontheinternalnetworkinformationneedthestateinformationwhichcontaintheinternalnetwork’sbranchoutage,itsrequirementisrigorousanditishardtobeenappliedinpracticalpowersystem.Inthecaseoftheexternalnetworkinformationcompletelyunknown,thispaperpresentsamulti
5、-portexternalnetworkstaticequivalentmethodonthebasisofinternalnetworkmeasuredinformationtoestimatemulti-portexternalnetwork’sequivalentnetworkanditsparameters.Thispaperusestheconstraintrelationbetweentheexternalnetworkequivalentparametersandtheinternalnetworkmeasuredinformation,whichdoesno
6、trequirethebranchoutage.Itadopttwo-stageestimationscheme,establishmulti-portexternalnetworkequivalentparameter’smeasurementequationanditstwo-stage’sleastsquaresmodel,thensolvethemulti-portexternalnetworkequivalentparametersusingtheleastsquaremethod.ThesimulationresultsoftheIEEE-39bussystem
7、andGuangdongpowergridindicatethattheproposedmethodcanimprovetheprecisionofinternalnetwork’sstaticsecurityanalysiseffectively.Keywords:Staticsecurityanalysis;externalnetworkstaticequivalent;multi-port;leastsquares;internalnetwork’smeasuredinformation0引言随着我国电力改革
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