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I摘要随着市场经济的推进和城市建设的发展�城市电网建设已经成为当前电力建设的重要内容。传统的110kV变电站大部分都采用户外构架布置方式�考虑到城市规划、环保、节约土地资源、减少日常维护工作量等各方面因素�原来的户外构架型式布置的变电站已经不能满足要求�放置于户外的变压器所产生的噪声及户外设备与城市景观的不协调也成为比较突出和亟待解决的问题。相对于常规变电站�SF6气体绝缘全封闭组合电器GIS�GasInsulationSwitchgear�装置技术属国内领先�并且具有占地少、建设快、结构紧凑、环境适应能力强、检修周期长、运行安全可靠等诸多优点。因此�全户内GIS变电站设计模式将逐步成为变电站设计的首选。本文以某110kVGIS变电站工程设计为课题�详细描述了全户内GIS设计模式下变电站的电气主接线设计、短路计算、设备选择、继电保护、配电装置、站用电设计等方面的内容。通过综合分析表明�在当前的发展形势下�采用全户内GIS布置的变电站已成为未来电网建设的趋势。关键词�GIS�电气主接线�开关柜�继电保护IIABSTRACTWiththemarketeconomypromotionandthedevelopmentofurbanconstruction,urbanpowergridconstructionhasbecomeanimportantaspectofpowerconstruction.Oitatraditionaluse110kVoutdoorsubstationlayoutframework,takingintoaccounttheurbanplanning,environmentalprotection,conservationoflandresourcesandreducetheworkloadofday-to-daymaintenanceandotherfactors,theoriginallayoutoftheoutdoorsubstationtypeframecannolongermeettherequirementsplacedontheoutdoornoisegeneratedbytransformersandoutdoorequipmentandlackofco-ordinationoftheurbanlandscapehasbecomemoreprominentandurgentproblems.Comparedtoconventionalsubstations,SF6gas-insulatedGIS�GasInsulationSwitchgear�isanationalleaderindevicetechnology,andhasanareaofsmall,fastconstruction,compactstructure,strongabilitytoadapttotheenvironment,maintenancecyclelength,suchassafeandreliableoperationadvantages.Therefore,allindoorGISsubstationdesignpatternwillgraduallybecomethepreferredsubstationdesign.Inthispaper,a110kVGISsubstationengineeringdesignforthesubject,adetaileddescriptionoftheentireindoorGISsubstationdesignmode,themainelectricalwiringdesign,shortcircuitcalculation,equipmentselection,relayprotection,powerdistributiondevices,powerstationsandotheraspectsofthedesignthroughcomprehensiveanalysisofdevelopmentinthecurrentcircumstances,theuseofGISwithintheplenarysessionofthesubstationlayouthasbecomethetrendofthefutureconstructionofpowergrids.KEYWORDS:GIS,themainelectricalwiring,switchgear,relayprotectionIII目录第1章绪论..............................................................11.1、概述.............................................................11.2、GIS的主要优点...................................................11.3、设计任务.........................................................2第2章电气主接线设计....................................................32.1、电气主接线的设计.................................................32.1.1概述..........................................................32.1.2电气主接线的基本要求..........................................42.1.3电气主接线的基本原则..........................................52.1.4电气主接线的设计程序..........................................52.2、电气主接线的选择.................................................72.2.1110kV侧电气主接线的选择.....................................72.2.235kV侧电气主接线的选择......................................82.2.36kV侧电气主接线的选择.......................................92.3、GIS变电站电气主接线图..........................................10第3章短路计算.........................................................113.1、短路电流计算的目的..............................................113.2、短路计算的一般原则..............................................113.3、短路计算的假定条件..............................................123.4、拟建变电站的短路计算............................................12第4章电气设备的选择...................................................174.1、电气设备选择概述................................................174.2、主要电气设备选择................................................184.2.1110kV侧电气设备选择........................................184.2.235kV侧电气设备选择.........................................214.2.36kV侧电气设备选择..........................................22第5章继电保护设计.....................................................24IV5.1、继电保护概述....................................................245.1.1继电保护的任务...............................................245.1.2对继电保护的一般要求.........................................245.1.3继电保护的灵敏系数...........................................255.1.4变电站继电保护的配置.........................................265.2、拟建变电站的继电保护............................................41第6章防雷与接地保护设计...............................................436.1、防雷及过电压保护................................................436.1.1直击雷保护..................................................436.1.2雷电入侵波过电压保护........................................446.2、接地保护........................................................446.3、电缆敷设........................................................44第7章配电装置.........................................................467.1、配电装置的基本要求..............................................467.2、配电装置的最小安全净距..........................................477.3、配电装置的类型..................................................477.4、拟建变电站的配电装置............................................48第8章所用电设计.......................................................49工作总结................................................................51参考文献................................................................52致谢....................................................................541第1章绪论1.1、概述SF6气体绝缘开关装置�GasInsulationSwitchgear�也称封闭式组合电器�简称GIS�是由断路器、隔离开关、互感器、避雷器、母线�单相或三相�、连接管、电缆连接头、出线套管