某机械厂10KV配电变电所设计-李海鹏-张永宜

西安工程大学本科毕业设计（论文）I摘要电能是现代工业生产的主要能源和动力，随着现代文明的发展与进步，社会生产和生活对电能供应的计量和管理提出了越来越高的要求，机电设备厂供电系统的核心部分是变电所。变电所主接线设计是否合理，关系到整个电力系统的安全、灵活和经济运行。本设计在机械厂具体资料的基础上，依据变电所设计的一般原则和步骤，完成了变电所一次系统的设计。为适应机械类企业用电负荷变化大、自然功率因数大的特点，该设计中采用并联电容器的方法来补偿无功功率，以减少供电系统的电能损耗和电压损失，同时提高了供电电压的质量。此机电设备厂变电所一次系统的设计包括：变电所主接线方案的选择；进出线的选择；短路计算和开关电气设备的选择；根据设计要求，绘制变电所一次系统图等。关键词：变电所，变压器，短路电流，电气设备西安工程大学本科毕业设计（论文）IIABSTRACTElectricityisthemainmodernindustrialproduction,energyandpower,alongwiththedevelopmentofmoderncivilizationandprogress,socialproductionandlivingtotheelectricpowersupplytricksormanagementputforwardmoreandmorehighdemand,Machineryfactorypowersupplysystemisthecorepartofsubstation.Substationdesignisreasonableornot,mainconnectionrelationshiptothewholepowersystemsecurity,flexibleandeconomicoperation.Thisdesigninmachineryfactoryconcretematerialbasis,accordingtothegeneralprincipleandstepsofsubstationdesign,completedthefirstsystemdesign.Substationinordertoadapttothemachineryenterpriseelectricityloadchangeisbig,thecharacteristicsofnaturalpowerfactor,thefirstusedinthedesignoftheprincipalcapacitorcompensationreactivepowerjustsenttoreducepowersupplysystemofelectricpowerlossandvoltageloss,andatthesametime,improvethequalityofpowersupplyvoltage.Thisfactorysubstationsystemdesignincluding:oneofthemainsubstationwiringschemeschoice;Inthechoicetoqualify；Shortcircuitcalculationandswitchgearequipmentchoice；Accordingtothedesignrequirements,drawsubstationasystemdiagram.Keywords:substation,transformer,Short-circuitcurrent,Electricalequipment西安工程大学本科毕业设计（论文）III目录第1章.前言.........................................................11.1设计要求....................................................11.2设计依据....................................................11.2.1工厂总平面图............................................11.2.2工厂负荷情况............................................11.2.3供电电源情况............................................21.2.4气象资料................................................31.2.5电费计量方式............................................3第2章.负荷计算.....................................................42.1单组用电设备计算负荷的计算公式..............................42.2多组用电设备计算负荷的计算公式..............................4第3章.无功补偿接入基本要求及计算...................................73.1补偿基本要求................................................73.2补偿原理及计算..............................................7第4章.变电所位置和型式选择........................................104.1变配电所所址选择的一般原则.................................104.2型式与布置.................................................114.3负荷中心的确定方法.........................................11第5章.主变压器台数和容量、类型的选择..............................135.1变压器选择原则.............................................135.2变压器台数.................................................135.3变压器容量.................................................135.4台数、容量、类型的选择.....................................13第6章.变电所主接线方案设计........................................156.1单母线接线.................................................156.2单母线分段接线.............................................156.3主接线方案技术比较.........................................16西安工程大学本科毕业设计（论文）IV6.4主接线图（见附表1）.......................................17第7章.短路电流的计算..............................................187.1绘制计算电路...............................................187.2确定短路计算基准值.........................................187.3计算短路电路中元件的电抗标幺值.............................187.4k-1点（10.5kV侧）的相关计算...............................197.5k-2点（0.4kV侧）的相关计算................................19第8章.变电所一次设备选择和校验....................................228.110KV侧一次设备选择和校验.................................228.2380V侧一次设备的选择校验..................................248.3高低压母线的选择..........................................24第9章.变电所进出线的选择和校验....................................269.110kV高压进线和引入电缆的选择..............................269.1.110kV高压进线的选择校验................................269.2380低压出线的选择.........................................269.2.1铸造车间...............................................279.2.2锻压车间...............................................289.2.3金工车间...............................................299.2.4工具车间...............................................299.2.5电镀车间..............................................309.2.6热处理车间.............................................319.2.7装配车间...............................................319.2.8机修车间...............................................329.2.9锅炉房.................................................339.2.10仓库..................................................349.2.11生活区................................................349.3作为备用电源的高压联络线的选择校验.........................359.3.1按发热条件选择.........................................359.3.2校验电压损耗...........................................35西安工程大学本科毕业设计（论文）V9.3.3短路热稳定校验.........................................36第10章.继电保护的设计整定.........................................3810.1继电保护要求..............................................3810.2变压器继电保护............................................3810.3装设电流速断保护..........................................4010.4架空线路的保护..............