南华大学电气工程学院课程设计课程设计(论文)题目凝汽式火电厂一次部分设计学院名称电气工程学院指导教师职称教授班级电力1102班学号学生姓名iii南华大学电气工程学院课程设计2014年6月30日i南华大学电气工程学院课程设计摘要[摘要]:本次设计的是凝汽式火力发电厂电气一次部分,这次主要对一下几个内容进行分析和设计:首先需要对主接线进行选择,设计主接线的原则是将可靠性经济性和灵活性三者综合考虑的。因为本次设计所需的机组容量比较大,对主接线的可靠性要求非常高,所以就单母线的接线方式而言可以暂不考虑,重点考虑双母接线以及一台半断路器的接线方式。然后,根据发电机容量、负荷容量和厂用电率分别确定主变压器、联络变压器和厂用变压器的容量和台数、结构和型式最后,选择短路点,按照最严重的情况计算出短路点的最大短路电流,再根据短路电流的大小选择合适的断路器、隔离开关、电压互感器、电流互感器等电器设备。最后综合各个步骤绘制出电气主接线图。[关键字]:凝汽式火电厂、发电机、变压器、双母带旁路、断路器ii南华大学电气工程学院课程设计[Abstract]:Thisdesigniscondensingpowerplantelectricalpart,themainanalysisanddesignthefollowingcontents:first,theneedtochoosethemainwiring,themainwiringdesignistheprincipleofthereliability,economyandflexibilityofthethreeconsidered.Becausethenumberofthedesignoftheunitcapacityislarge,thereliabilityofthemainwiringrequirementsareveryhigh,sotheconnectionmodeofsinglebuscannotconsider,considerdoublebusbarconnectionandahalfbreakerconnection.Then,accordingtothecapacityofgenerator,loadcapacityandpowerconsumptionraterespectivelytodeterminethemaintransformer,transformerandtransformercapacityandnumbers,structureandtype.Finally,selecttheshortpoint,accordingtothemostseriouscasestocalculatethemaximumshort-circuitcurrentshort-circuitpoint,thenaccordingtotheshortcircuitcurrentsizechoosethecircuitbreaker,theappropriateisolationswitch,voltagetransformer,currenttransformerandotherelectricalequipment.Finally,thecomprehensivestepstodrawthemainelectricalwiringdiagram.[keyword]:condensingpowerplant,generator,transformer,doublebusbarwithbypass,circuitbreakeriii南华大学电气工程学院课程设计目录1.电气主接线.................................................................................................................11.1系统与负荷资料分析......................................................................................11.2主接线方案的择..............................................................................................21.3变压器的选择与计算......................................................................................62.短路电流的计算.......................................................................................................102.1短路计算的一般规则....................................................................................102.2短路电流计算表............................................................................................113.电气设备的选择.......................................................................................................133.1电气设备选择的一般规则............................................................................133.2电气选择的条件............................................................................................133.3电器设备的选择的结果表............................................................................153.4主接线中设备配置的一般原则....................................................................173.5电气设备选择的结...