毕业设计论文正文2345667

（二O一一年六月本科毕业设计说明书学校代码：10128学号：0711202052题目：500/220/35kV变电站电气部分初步设计（谐振接地系统过电压分析）学生姓名：刘辰遐学院：电力学院系别：电力工程系专业：电气工程及其自动化班级：电气07-2指导教师：赵瑛副教授内蒙古工业大学本科毕业设计说明书摘要本次毕业设计的题目是：500/220/35kV变电站电气部分初步设计（谐振接地系统过电压分析）。设计内容包括：500kV枢纽变电站电气主接线设计；主变压器型号、容量的确定；所用电设计；短路电流计算；主要电气设备选择、校验；接地装置的设计；配电装置的设计以及谐振接地系统过电压分析。谐振接地系统中一般经消弧线圈接地,谐振接地系统中过电压现象的产生主要是各种原因引起的中心点位移电压升高造成的。在整个设计中电气主接线的设计非常重要，因为它的可靠性、经济性和灵活性直接影响着整个变电所的可靠性、经济性和灵活性。还影响着短路计算、设备的选择校验等内容。关键词：主接线；短路电流；过电压；谐振接地系统内蒙古工业大学本科毕业设计说明书AbstractMygraduationthesistopicis:“Theelectricsectionpreliminarydesignof500KVvitalpointstation(Analysisofresonanceover-voltagegroundingsystem)”,including:Theelectricsectiondesignof500KVvitalpointstation;Thetypesandcapacityselectionoftransformer;Shortcircuitcalculation;Themainelectricapplianceequipmentschoiceandchecks;Groundingcalculation;Analysisofresonanceover-voltagegroundingsystem;Thedesignofdistributioninstall.Resonantgroundingsystemingeneralarcsuppressioncoilgrounding,Resonantgroundingsystemover-voltagephenomenainthegenerationofavarietyofcausesvoltagerisecausedbythedisplacementofthecenter.Themainlinedesignedareveryimportantinalldesign.Becauseitsdependability、Economyandelasticityaredirectlyaffectingtheentirepowernetworkandplantdependability、Economyandelasticity.Stillaffectingtheshortcircuitcalculation、Theequipmentselectionandcheckisuptostandardtoit.Keywords：electricmainline;shortcircuit;over-voltage;resonantgroundingsystem内蒙古工业大学本科毕业设计说明书目录引言..................................................................1第一章电气主接线设计..................................................21.1电气主接线的基本要求...........................................21.1.1电气主接线的基本要求.....................................21.1.2电气主接线的形式.........................................31.1.3本变电所主接线设计.......................................61.2变电所主变压器的选择...........................................81.2.1主变压器容量、台数的确定.................................81.2.2主变压器型号和台数的选择.................................9第二章所用电设计.....................................................102.1所用电设计的基本内容..........................................102.1.1所用电设计的基本要求....................................102.1.2所用电供电电压等级及供电电源............................102.1.3变电所所用电接线........................................112.2本所所用电设计................................................112.2.1所用电接线..............................................112.2.2所用电变压器的选择......................................12第三章短路计算.......................................................133.1短路计算的目的、规定和步骤....................................133.1.1短路计算的目的..........................................133.1.2短路电流计算的一般规定..................................133.1.3短路计算的一般步骤......................................143.2短路电流计算..................................................143.2.1变压器参数计算..........................................143.2.2短路计算................................................15第四章电气设备选择...................................................194.1电气设备选择的一般条件........................................194.1.2按短路情况校验..........................................204.1.3各回路持续工作电流的计算................................224.2高压电气设备选择..............................................244.2.1断路器的选择及校验......................................244.3隔离开关的选择与校验..........................................284.3.1隔离开关的选择原则......................................294.3.2隔离开关的选择与校验....................................294.3.3接地开关的选择..........................................354.4互感器的选择与校验............................................354.4.1电流互感器的选择原则....................................354.4.2电流互感器的选择及校验..................................364.4.3电压互感器的选择与校验..................................394.5熔断器的选择..................................................414.6避雷器的选择..................................................42内蒙古工业大学本科毕业设计说明书4.6.1选择原则................................................424.6.2避雷器的选择............................................424.7母线的选择及校验..............................................434.8无功补偿装置..................................................474.8.1补偿装置................................................484.8.2无功补偿装置选择........................................49第五章防雷及接地装置的设计...........................................515.1防雷装置设计..................................................515.1.1变电所的防雷保护........................................515.1.2直击雷保护措施..........................................515.1.3变电站的雷电侵入波保护..................................525.1.4变电站的进线段保护......................................525.2接地装置的布置................................................525.2.1接地装置布置的一般原则..................................52第六章变电站配电装置的设计...........................................556.1配电装置的特点................................................556.1.1屋内配电装置............................................556.1.2屋外配电装置............................................556.2配电装置的基本要求及基本步骤..................................556.2.1配电装置的基本要求......................................566.2.2配电装置设计的基本步骤..................................566.2.3有关布置的若干问题......................................566.2.4配电装置的设计.