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学号：2012210542XINJIANGINSTITUTEOFENGINEERING毕业设计设计题目：220KV变电站一次系统设计学生姓名：汪凯凯专业：电力工程及其自动化班级：电气工程12-3（本）系部：电力工程系指导教师：付涛讲师二〇一六年五月九日摘要展望未来，我国能否在本世纪中叶基本实现现代化，相当大的程度上取决于能源。电力工业是国民经济的基础，是重要的支柱产业，它与国家的兴衰和人民的安康有着密切的关系，随着经济的发展和现代工业的建设的迅速崛起，供电系统的设计越来越全面、系统，工厂用电量迅速增长，对电能质量、技术经济状况、供电的可靠性指标也日益提高，因此对供电设计也有了更高、更完善的要求。变电站作为电能传输与控制的枢纽必须改变传统的设计和控制模式，才能适应现代电力系统、现代化工业生产和社会生活的发展趋势。本设计讨论的220kV变电站电气部分设计（一次系统），首先根据原始资料进行分析，负荷计算选择主变压器，然后在此基础上进行主接线设计，再进行短路计算，导体和电气设备的选择，最后进行防雷接地设计。关键词：变电站；负荷计算；短路电流；设备选择ABSTRACTLookingahead,ourabilitytoachievethemiddleofthiscentury,modernization,toalargeextentdependsonenergy.Thepowerindustryisthebasisofthenationaleconomyisanimportantpillarindustry,theriseandfallwiththeStateandthepeoplecloselyrelatedtothewell-being,alongwitheconomicdevelopmentandtherapiddevelopmentofmodernindustryrise,moreandmorepowersupplysystemdesigncomprehensive,systematic,rapidgrowthofplantconsumptionforpowerquality,technicalandeconomicconditions,reliabilityofelectricitysupplyareincreasing,andthereforealsohavehigherpowersupplydesign,betterrequirements.Substationasahubforpowertransmissionandcontroltochangethetraditionaldesignandcontrolmode,toadapttothemodernpowersystem,modernizationofindustrialproductionandthedevelopmenttrendofsociallife.Thedesigndiscussionispartof220KVelectricalsubstationdesign(asystem),Firstofall,analyzetheoriginaldataandchoosethemaintransformer,basedonit,designthemainwiringandShortCircuitCalculation,atlastchooseequipment,thenmineandtheprotectionofearthanddistributiondevice.Keywords:substation;short-circuitcurrent;equipmentselection;distributionequipment目录摘要.............................................................................................................................IABSTRACT..................................................................................................................II1绪论.......................................................................................................................-1-1.1电力行业的现状........................................................................................-1-1.2研究背景....................................................................................................-1-2电气主接线的设计................................................................................................-3-2.1电气主接线的概述.....................................................................................-3-2.2电气主接线的基本要求.............................................................................-3-2.3电气主接线设计的原则.............................................................................-3-2.4电气主接线的方案选择.............................................................................-3-3负荷计算和主变压器的选择................................................................................-7-3.1主变压器的选择原则.................................................................................-7-3.2负荷计算.....................................................................................................-8-3.3无功补偿...................................................................................................-10-3.4主变压器选择结果...................................................................................-12-3.5站用变的选择...........................................................................................-12-4.短路电流的计算..................................................................................................-15-4.1短路的危害...............................................................................................-15-4.2短路电流计算的目的...............................................................................-15-4.3短路电流计算的内容...............................................................................-16-4.4短路电流计算方法...................................................................................-16-4.5三相短路电流周期分量起始值的计算...................................................-17-5导体和电气设备的选择......................................................................................-21-5.1按正常工作条件选择电气设备...............................................................-21-5.2按短路状态校验.......................................................................................-21-5.3高压断路器...............................................................................................-22-5.4220kV侧断路器隔离开关的选择与校验...............................................-24-5.5110kV侧断路器隔离开关的选择与校验...............................................-26-5.635kV侧断路器隔离开关的选择与校验.................................................-27-5.7互感器的选择...........................................................................................-29-5.835kV高压熔断器的选择.........................................................................-33-5.9导体的选择与校验...................................................................................-34-6防雷及过电压保护装置设计..............................................................................-40-6.1避雷针.......................................................................................................-40-6.2避雷器.......................................