成都理工大学工程技术学院毕业论文汽车制造厂降压变电所电气设计作者姓名:专业名称:电气工程及其自动化指导教师:成都理工大学工程技术学院学位论文诚信承诺书本人慎重承诺和声明:1.本人已认真学习《学位论文作假行为处理办法》(中华人民共和国教育部第34号令)、《成都理工大学工程技术学院学位论文作假行为处理实施细则(试行)》(成理工教发〔2013〕30号)文件并已知晓教育部、学院对论文作假行为处理的有关规定,知晓论文作假可能导致作假者被取消学位申请资格、注销学位证书、开除学籍甚至被追究法律责任等后果。2.本人已认真学习《成都理工大学工程技术学院毕业设计指导手册》,已知晓学院对论文撰写的内容和格式要求。3.本人所提交的学位论文(题目:汽车制造厂降压变电所电气设计),是在指导教师指导下独立完成,本人对该论文的真实性、原创性负责。若论文按有关程序调查后被认定存在作假行为,本人自行承担相应的后果。承诺人(学生签名):20年月日注:学位论文指向我校申请学士学位所提交的本科学生毕业实习报告、毕业论文和毕业设计报告。汽车制造厂降压变电所电气设计-I-摘要时代在进步,各个方面的需求也不断的提高,在电力供应方面的要求更是越来越高,特别是供电的基本要求必须达标。然而要满足电网的基本性能要求通常都是取决于变电站设计的合理性和配置适合性。一个典型的变电站要求变电设备运行可靠、经济合理、操作灵活、扩建方便。从设计和要求方面的考虑,这片论文的设计是一个工厂降压变电站的线路电气设计;低压侧电压为10kV,有八个出线贿赂,其中有六回是双回路供电。同时在变电站的各个设备的型号选择的合理性有非常重要的作用。本设计选择选择两台SFSZL-31500/110主变压器,在进行其它设备元件选择型号和连接方式设计时,如站用变、断路器、隔离开关、电流互感器、高压熔断器、电压互感器、无功补偿装置和继电保护装置等等,要做到以下的要求,设备运行稳定可靠,操作方面要简单、方便,在设备的购买时要经济合理,并且建设时要考虑到以后扩建的可能性和能够在必要时灵活的改变运行方式。使其更加贴合实际,更具现实意义。关键字:变电所电气设备设计汽车制造厂降压变电所电气设计-II-AbstractTimesinprogress.thedemandforeachaspectalsocontinuouslyimprove,inthepowersupplyrequirementsisincreasinglyhigh,especiallypowersupplybasicrequirementsmustmeetstandaras.Hwever,thebasicperformancerequirementsofthepowernetworkareusuallydeterminedbytherationalityandconfigurationofthesubstationdesign.Atypicalsubstationrequirestheoperationofsubstationquipment,eliable,reasonable,flexibleoperationandexpansionofthesubstationequipment.Formthedesignandrequirementsconsiderations,thedesignofthispaperistheelectricaldesignofaplantbucksubstation;plantbucksubstation;electricity,powerandenergyisthemainenergyinmangplaces,canbeconvertedtosupplythroughdifferentwaystosupplytherequiredaspect;Thelowvoltagesidevoltageof10Kv,thereareeightoutgoingbribery,whichhassixbackisthedoublelooppowersupply.Atthesametime,therationalityofthechoiceofthevariousequipmentsinthesubstationisveryimportantsupply.ThisdesignselectstwoSFSZL-31500\100maintransformer,incarriesontheotherequipmentelementchoicemodelandtheconnectionwaydesign,Suchasstationvariable,circuitbreaker,isolatedswitch,currettransformer,high-voltagefuse,voltagetransformer,reactivepowercompensationdeviceandrelayprotectiondeviceandrelayprotectiondevice,etc,Toachievethefollowingrequirements,theoperationofthedeviceisstableandreliable,andtheoperationshouldbesimpleandconvenient,thepurchaseoftheequipmentshouldbereasonable,andthepossibilityofexpansionandtheflexibilitytochangeoperationwhennecessary.Makeitmorerealistic,morerealistic.Keywords:substation,electricalequipment,design汽车制造厂降压变电所电气设计-III-目录摘要............................................................................................................IAbstract..................................................................................................II目录.........................................................................................................III前言...........................................................................................................11工厂供电...............................................................................................21.1工厂供电的意义和要求.............................................................21.2工厂供电设计的一般准则.........................................................32设计依据...............................................................................................42.1工厂负荷情况.............................................................................42.2供电电源情况.............................................................................42.3气象资料与地质水文资料.........................................................52.5电费制度.....................................................................................53负荷计算...............................................................................................63.1负荷的分类.................................................................................63.2计算厂总降压变负荷.................................................................63.2.1计算负荷概念.......................................................................63.2.2计算负荷目的.......................................................................73.2.3计算负荷方法.......................................................................73.3负荷计算.....................................................................................73.3.1单组用电设备计算负荷的计算公式...................................73.3.2多组用电设备计算负荷的计算公式...................................83.4无功功率补偿...........................................................................103.5无功补偿的主要作用...............................................................104变电所位置和主变压器台数的选择.................................................114.1变电所选择位置的要求...........................................................114.2主变压器台数和容量选择.......................................................12汽车制造厂降压变电所电气设计-IV-5变电所主接线方案的选择.................................................................145.1装设一台主变压器的主接线方案...........................................145.2装设两台主变压器的主接线方案...........................................156短路电流的计算.................................................................................166.1产生短路的原因和短