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西安工程大学本科毕业设计（论文）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I西安工程大学本科毕业设计（论文）ABSTRACTElectricityisthemainmodernindustrialproduction,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,ElectricalequipmentII西安工程大学本科毕业设计（论文）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...