10kV城市箱变的设计

山东电力高等专科学校毕业设计（论文）论文题目：10kV城市箱变的设计班级学号：_________________________姓名：_________________________专业名称：_________________________2011年12月26日林雨发电厂及电力系统DZ09-4班33号2山东电力高等专科学校毕业设计（论文）毕业设计题目：10kV城市箱变的设计作者：_________________________指导教师：单位：协助指导教师：单位：单位：完成日期：2011年12月26日孙承海林雨摘要箱式变电站又称户外成套变电站，也有称做组合式变电站，它是一种高压开关设备、配电变压器和低压配电装置，按一定接线方案排成一体的工厂预制户内、户外紧凑式配电设备，即将高压受电、变压器降压、低压配电等功能有机地组合在一起，安装在一个防潮、防锈、防尘、防鼠、防火、防盗、隔热、全封闭、可移动的钢结构箱体内，机电一体化，全封闭运行，特别适用于城网建设与改造，是继土建变电站之后崛起的一种崭新的变电站。10kV箱式变电站的设计高压侧额定电压为10kV，低压侧额定电压为0.4kV，主变压器容量为1600kVA。主接线采用单母线分段接线。本课题的主要内容包括箱式变电站的发展应用，箱式变电站的结构分类，以及箱式变电站一次系统设计及其设备选型，二次系统设计，以及箱式变电站的智能监控系统。关键词：箱式变电站结构一次系统二次系统2AbstractBox-typetransformersubstation,callsagainoutdooratransformersubstation,alsocalltodothesectionaltransformersubstation,itisahigh-voltageswitchgear,distributiontransformersandlowvoltagedistributionequipment,wiringschemeaccordingtocertainpre-arrangedoneindoorplants,outdoorcompactwithelectricalequipment,highpressurewillbeelectric,step-downtransformers,lowvoltagepowerdistributionandotherfunctionstogetherorganically,installedinamoisture-proof,rust,dust,vermin,fire,theft,insulated,fullyenclosed,mobilesteelcabinets,mechanicalandelectricalintegration,fullyenclosedrun,especiallyforurbannetworkconstructionandtransformation,followingtheconstructionofasubstationaftertheriseofthenewsubstation.Thedesignhighpressuresidesumofbox-typetransformersubstationsettleselectricvoltageas10kV,thelow-pressuresidesumsettleselectricvoltageas0.4KVs,maintransformercapacityis1600kVA.Submainwiringconnectionusingasinglebus.Themaintopicsincludethedevelopmentandapplicationofbox-typesubstation,box-typesubstationstructureclassification,aswellasabox-typesubstationsystemdesignandequipmentselection,thesecondsystemdesign,andbox-typesubstationintelligentmonitoringsystem.KeyWord:box-typetransformersubstationconstructionfirstsystemsecondsystem.3目录前言............................................................................................................1第一章绪论.......................................................21.1箱式变电站的概述..............................................21.2箱式变电站的类型、结构........................................21.2.1箱式变电站的类型......................................21.2.2箱式变电站的结构........................................21.3箱式变电站的特点...............................................错误！未定义书签。第二章10kV箱式变电站的总体结构............................42.1电气主接线的确定..............................................42.1.1主接线的基本形式与选择..................................42.1.2高压接线方式............................................62.1.3主接线的基本要求、设计依据、原则及步骤..................62.2变压器的选择..................................................72.2.1变压器台数和接线组别的确定..............................72.2.2变压器容量的确定........................................82.2.3变压器型号说明..........................................82.2.4变压器的散热处理........................................92.2.5采用负荷开关—熔断器组合电器保护变压器..................92.3电力电缆的选择..................................................92.3.1电力电缆选择的一般原则.................................102.3.2电力电缆的选择应满足的条件.............................112.4箱式变电站总体置................................................12第三章短路电流的计算......................................错误！未定义书签。3.1短路电流的定义............................................133.2短路电流的危害............................................1343.3短路电流计算的目的........................................133.4短路电流的计算............................................13第四章10kV箱式变电站一次系统设计与设备选型...............错误！未定义书签。4.110kV箱式变电站一次系统设计...................................184.1.1概述....................................................184.1.2一次系统设计原则........................................184.1.3一次系统设计............................................184.2设备选型......................................................184.2.1设备选型的基本原理......................................184.2.2高低压电器设备选择的要求................................204.2.3断路器的选型............................................214.2.4高压熔断器的选择........................................224.2.510KV负荷开关和熔断器组合的选择.........................224.2.6互感器的选型............................................234.2.7隔离开关的选型..........................................244.2.8开关柜的选型............................................244.2.9高低压母线选择.............................................26第五章10kV箱式变电站继电保护方案设计.....................275.1箱变的继电保护作用及原理....................................275.1.1箱变继电保护的作用.....................................275.1.2箱变继电保护的工作原理.................................275.2箱变的继电保护设计...........................................275.2.1变压器保护............................................275.2.2线路保护..............................................285.2.310kV电容器保护.......................................305.2.4备用电源自投装置......................................30第六章箱式变电站的防雷保护和接地装置的设计................3156.1箱变防雷保护的必要性..........................................316.2箱变的防雷保护措施...........................................316.2.1箱变防雷分析............................................316.2.2箱变防雷措施.............................................316.3接地装置........................................