2012届毕业设计（论文）腾达机械厂降压变电所的设计系、部：电气与信息工程系学生姓名：指导教师：职称：专业：班级：学号：第2页共39页编号：时间：2021年x月x日书山有路勤为径，学海无涯苦作舟页码：第2页共39页2012年5月摘要电能是现代工业生产的主要能源和动力。机械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。本设计在给定机械厂具体资料的基础上，根据本厂所能取得的电源及本厂用电负荷的实际情况，并适当考虑到工厂生产的发展按照安全可靠技术先进经济合理的要求确定变电所的位置，确定变电所主变压器的台数和容量类型选择变电所主接线方案及高低压设备和进出线确定二次回路方案，选择整定继电保护装置，确定防雷和接地装置，最后按照要求写出设计说明书。关键词：电能；变电所；二次回路；变压器第3页共39页第2页共39页编号：时间：2021年x月x日书山有路勤为径，学海无涯苦作舟页码：第3页共39页ABSTRACTTheelectricityismodernindustrialproductionofmainsourcesofenergyandmotiveforce.Thecoreofthepowersupplysystemofmachineryfactoryissubstation.Thewiringisreasonabledesignsubstation,relatedtothewholepowersystemsecurity,flexibleandeconomicoperation.Thisdesigninagivenmachineryfactoryconcretematerialfoundation,accordingtoourfactorywillachievethepowerandtheactualsituationofourelectricityload,andappropriateconsiderationtothefactorytothedevelopmentoftheproductionaccordingtothesafeandreliabletechnologyadvancedeconomicandreasonablerequiredthepositionofthesubstation,determinethemaintransformersubstationNumbersandcapacitytypechoiceLordwiringschemesandhighorlowvoltagesubstationequipmentanddeterminetheoutletandthesecondarycircuitsolutions,choosethesettingrelayprotectiondevice,determinethelightningprotection第4页共39页第3页共39页编号：时间：2021年x月x日书山有路勤为径，学海无涯苦作舟页码：第4页共39页andgroundingdevice,finallyaccordingtotherequestandwritethedesignspecification。Keywords：power；substation；Thesecondarycircuit；transformer目录1绪论··························································11.1工厂供电的意义和要求···········11.2工厂供电设计的一般原则···················21.3本机械厂变电所的设计内容及依据··············22负荷计算和无功功率计算及补偿补偿42.1负荷计算概述····················42.2负荷计算的方法·············52.3无功功率的补偿·············································83变电所主变压器及主结线方案的选择································93.1变电所的概述·····················93.2变电所主接线选择················93.3高压线路导线的选择··············103.4低压线路导线的选择·····························第5页共39页第4页共39页编号：时间：2021年x月x日书山有路勤为径，学海无涯苦作舟页码：第5页共39页············104变电所变压器和主接线方案的选择··································114.1年耗电量的估算························114.2主变压器台数的选择·114.3变电所主变压器容量的选择···································115短路电流的计算··················································135.1短路的原因及后果················135.2本设计采用标幺制法进行...
