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毕业设计(论文)系别电力工程系专业班级学生姓名指导教师二○一○年六月题目110/35/10kV降压变电站一次系统设计本科毕业设计（论文）I110kV降压变电站一次系统设计摘要城市供电系统的核心部分是变电站。因此，设计和建造一个安全、经济的变电站，是极为重要的。110kV变电所设计以生产实际为依据，以变电所的最佳运行状态为基础，系统的阐明了110kV变电所设计的基本方法和步骤，经过多方面的校验，是满足实际生产需要的一套最优设计方案。本变电站设计除了注重变电站设计的基本计算外，对于主接线的选择与论证等都作了充分的说明，其主要内容包括：变电站主接线方案的选择，进出线的选择；变电站主变压器台数、容量和型式的确定；短路点的确定与短路电流的计算，电气设备的选择（断路器，隔离开关，电压互感器，电流互感器，避雷器）；配电装置设计和总平面布置；防雷保护与接地系统的设计。另外，绘制了七张图纸，包括：电气主接线图，电气总平面布置图，防雷接地图，110kV接线断面图，110kV内桥断面图，35kV接线断面图，10kV室内配电图等。图纸规格与布图规范都按照了电力系统相关的图纸要求来进行绘制。关键词：变电站；电气主接线；电气设备；设计本科毕业设计（论文）IIADESIGNOFELETRICSYSTEMFOR110kVTERMINALTRANSFORMERSUBSTATIONAbstractThecoreofcityforsupplyingpoweristransformer.Itisveryimportanttodesignandbuildonesafeandeconomicaltransformersubstation[1].Theactualdesignfortheproduction,basedonthebestoperationtosubstationsbasedsystemdesignedtoclarifythe110kVsubstationsbasicmethodsandsteps,aftermultipleaccess,isasetofsolutionstomeettheneedsofactualproductiondesignprograms.Besidespayingattentiontobasiccalculationofdesignfortransformersubstation,thedesignmakessatisfyingnarrationtowardchoiceandargumentationofmainconnection.Themaincontentofthisdesignincludethechoiceofmainconnectionfortransformersubstation;thechoiceofpassinandoutline;thecertaintyofnumber,capacitanceandmodelformaintransformer;thecertaintyofshortcircuitpointsandcalculationofshortcircuit;thechoiceelectricequipment(breaker,insulateswitch,voltagemutual-inductanceimplement,currentmutual-inductanceimplement,arrester);thedesignfordistributionanddisposalforchiefplane;thedesignforlightningproofprotectionandearthsystem.Inaddition,drawingsevenblueprintsincludethemainwiringdiagram;thedisposaldrawingofelectricplane;thedrawingoflightningproofprotectionandearthsystem;thedrawingof110kVconnection;thedrawingof35kVconnection;thedrawingof10kVindoordistributionandsoon.Boththespecificationofdrawingandthecriterionofdisposalisbasedonrequirementofdrawingtoelectricpowersystem.Keywords:Transformersubstation;Mainconnection;Electricequipment;Design本科毕业设计（论文）目录摘要........................................................................IABSTRACT...................................................................II1绪论......................................................................11.1课题背景................................................................11.2变电站设计发展概况......................................................11.3本文主要研究内容........................................................12电气主接线设计............................................................22.1主接线的设计原则........................................................22.2主接线设计的基本要求....................................................32.2.1主接线可靠性的要求....................................................32.2.2主接线灵活性的要求....................................................32.2.3主接线经济性的要求....................................................32.3电气主接线的选择和比较..................................................32.3.1主接线方案的拟订......................................................32.3.2主接线各方案的讨论比较................................................62.3.3主接线方案的初选择....................................................83主变压器的选择与论证......................................................93.1主变压器容量的确定......................................................93.2主变压器台数的确定......................................................93.3主变压器型式的确定.....................................................103.4主变压器的计算与选择...................................................103.4.1容量计算.............................................................103.4.2变压器型号的选择.....................................................104短路电流的计算...........................................................114.1网络的等值变换与简化...................................................114.2短路点的选择与各短路点的短路电流的计算.................................115重要的电气设备选择.......................................................145.1断路器的选择...........................................................145.1.1断路器选择原则与技术条件.............................................145.1.2断路器型号的选择及校验...............................................155.2隔离开关的选择.........................................................165.2.1隔离开关的选择原则及技术条件.........................................165.2.2隔离开关型号的选择及校验.............................................176方案D与方案E的技术经济比较.............................................18本科毕业设计（论文）6.1方案的总投资比较.......................................................186.2方案的综合投资比较.....................................................186.3方案的年运行费比较.....................................................186.4最终方案的确定.........................................................207其它电气设备的选择.......................................................217.1电流互感器的选择.......................................................217.2电压互感器的选择.......................................................247.2.1110kV母线电压互感器的选择...........................................247.2.235kV母线电压互感器的选择............................................247.2.310kV电压互感器的选择................................................257.3避雷器的选择................................................