某110KV终端变电所电气部分设计毕业设计说明书

精品文档。I欢迎下载毕业设计说明书题目：某110KV终端变电所电气部分设计专业：电气工程及其自动化学号：姓名：指导老师：时间：精品文档。I欢迎下载I欢迎下载摘要变电所是电力系统的重要组成部分，它直接影响整个电力系统的安全与经济运行，是联系发电厂和用户的中间环节，起着变换和分配电能的作用。本设计一个110KV终端降压变电所，首先根据各个电压等级的负荷进行计算变压器的容量，选取主变压器的台数﹑型号及其容量等各个参数。其次根据主接线的可靠性及其运行的灵活性，选择各个电压等级的的接线方式。并从经济和技术方面进行比较，选取最优接线方式。再次,根据主接线选择短路点，并画出等值网络图进行短路计算，根据各短路点计算出三相短路电流，短路容量，短路冲击电流的值。最后根据短路计算选取各个电压等级的母线，断路器，隔离开关，电流、电压互感器，避雷器，并进行校验,同时还做了变压器的继电保护;并简单的做了防雷保护。关键词：主接线；短路电流；电气设备选择；继电保护；防雷精品文档。II欢迎下载II欢迎下载AbstractElectricitysubstationisanimportantcomponentofthesystem,ithasadirectimpactontheentirepowersystem'ssecurityandeconomy,usersareconnectedpowerplantsandtheintermediatelinks,transformationanddistributionofelectricenergytoplaytherole.Thisdesignistheconstructionofa110KVsubstationsterminalbuck,firstofallbasedonthereliabilityofthemaincableandruntheflexibilitytochoosevariousvoltagelevelsoftheconnectionmode.Andfromtheeconomicandtechnicalaspectstocompare,selecttheoptimalconnectionmode.SecondaccordingtovariouslevelsofloadvoltagetransformertocalculatethecapacitytoselectthemaintransformerofTaiwananditscapacity,andothermodels﹑variousparameters.Onceagain,accordingtochoosethemainformofshort-circuitwiring,paintandnetworkequivalenttoshort-circuit,accordingtocalculatethethree-phaseshortcircuit,shortcircuitcurrent,short-circuitcapacity,short-circuittheimpactofcurrentvalue.Accordingtoselectthefinalcalculationofthevariousshort-circuitthebusvoltage,circuitbreakers,switchesisolation,current,voltagetransformers,arresters,andchecktoseewhethertheappropriateselectionofdevices,andalsodoneatransformerrelay.Keywords:mainelectricalconnection；shortcircuitcurrent;choiceofmainelectricalequipment;relayprotection;anti-lightning;精品文档。III欢迎下载III欢迎下载目录摘要..........................................................................IABSTRACT......................................................................II第一章引言....................................................................11.1设计在工程建设中的作用.....................................................11.2设计工作应遵循的主要原则...................................................11.3设计的基本程序.............................................................1第2章原始资料.................................................................2第3章电气主接线...............................................................43.1变电所主接线设计的基本要求：...............................................43.2主接线的设计依据...........................................................43.3变电所主接线设计原则：.....................................................53.4配电装置的基本接线及适用范围...............................................53.5电气主接线方案的拟定.......................................................93.6两种方案的比较............................................................113.7方案的确定................................................................113.8主接线的设备配置..........................................................11第4章主变压器台数和容量的选择................................................134.1主变压器台数的选择........................................................134.2.主变压器容量的选择........................................................134.3.各电压等级容量计算........................................................134.4主变压器型号的选择........................................................144.5无功补偿...............................................................144.6无功补偿并联电容器容量的选择..............................................154.7主变压器的中性点接地......................................................164.8所用变压器的选择..........................................................16第5章短路电流计算..........................................................185.1绘计算电路图..............................................................185.2.绘制等值网络图............................................................195．3短路计算.................................................................20精品文档。IV欢迎下载IV欢迎下载第6章高压电气设备的选择.....................................................296.2110KV侧电气设备的选择....................................................316.335KV侧电气设备的选择.....................................................336.410KV电气设备的选择.......................................................366.5电抗器的选择与校验........................................................38第7章导线的选择...........................................................407.1母线的选择与检验........................................................407.2架空线的选择..............................................................457.3电缆截面的选择............................................................46第8章电流互感器、电压互感器选择与校验.....................................488.110KV侧互感器选择与校验...................................................488.235KV侧互感器选择与校验..................................................498.3110KV侧互感器选择与校验.................................................50第9章防雷保护.............................................................529.1防雷保护..................................................................529.2防雷装置..................................................................529.3变电所的防雷保护..........................................................539.4设备的接地............................................................