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xxxxxx学院毕业论文题目35KV变电站总体设计姓名：___xxx______所在学院：__xxxxxxxxxxxxxx_所学专业：_xxxxxxxxxxxxxxxxxx_班级：___xxxxxxxxxxxxx___学号___xxxxxxxxxxxxxxxx_指导教师：____xxx______完成时间：__xxxxxxxxxxxxxxx_I摘要随着工业时代的不断发展，人们对电力供应的要求越来越高，特别是供电的稳固性、可靠性和持续性。然而电网的稳固性、可靠性和持续性往往取决于变电站的设计和配置。一个典型的变电站要求变电设备运行可靠、操作灵活、经济合理、扩建方便。出于这几方面的考虑，本论文设计了一个降压变电站。本次设计根据某氧化铝公司的电力负荷资料，作出了该公司35KV、10KV变电所的初步设计，工厂总降压变电所及配电系统设计是根据各个车间的负荷数量和性质，生产工艺对负荷的要求以及负荷布局，结合国家供电情况，解决对各部门的安全可靠，经济技术的分配电能力问题，毕业论文共分为八章，主要对变电站进行了主接线设计、负荷计算、短路电流的计算和高压电气设备的选择。本设计以实际负荷为依据，以变电所的最佳运行为基础，按照有关规定和规范，作出了满足该区供电要求的35kV变电所初步设计。设计中首先对负荷进行了统计与计算，选出了所需的主变型号，然后根据负荷性质及对供电可靠性要求拟定主接线设计，设计中还进行了短路计算和对主要高压电器设备进行了选择与计算，如断路器、隔离开关、电压互感器、电流互感器等。此外还进行了防雷保护的设计和计算，提高了整个变电所的安全性，另附主接线简图一张。关键词：35KV变电站总体设计IIAbstractWiththeindustrialdevelopmentofthetimes,peopleofthepowersupplyoftheincreasinglyhighdemand,especiallythepowersupplystability,reliabilityandconsistency.However,powergridstability,reliabilityanddurativeoftendependsonthedesignofsubstationanddistribution.Atypicalsubstationforsubstationequipmentreliablerunning,flexibleoperation,reasonableeconomy,convenientexpansion.Outofthisafewaspectsintoconsideration,thispaperdesignedastep-downtransformersubstation.Thisdesignaccordingtothealuminacompanyofelectricpowerloaddata,madethecompany35KV,10KVsubstationpreliminarydesign,factorytotalstep-downsubstationandpowerdistributionsystemdesignisbasedonthevariousworkshopsthenumberandnatureoftheload,theproductionprocessontheloaddemandandloaddistribution,andstatepower,toresolvethevariousdepartmentofsafety,economyandtechnologydistributioncapacity,graduationthesisconsistsofeightchapters,mainlyonthemainwiringdesignofsubstation,loadcalculation,calculationofshortcircuitcurrentandhighvoltageelectricalequipmentselection.Thisdesigntoactualloadasthebasis,tothesubstationoptimaloperationforthefoundation,inaccordancewiththerelevantprovisionsandnorms,thepowersupplywasmadetomeettherequirementsofthe35kVsubstationpreliminarydesign.Thedesignofthefirstloadofstatisticsandcalculation,electedforthevariabletype,thentheloadaccordingtothenatureandreliabilityofelectricityforthedevelopmentofthemainwiringdesign,inthedesignoftheshort-circuitcalculationandthemainhighvoltageelectricalequipmentonthechoicesandcalculations,suchascircuitbreaker,isolatingswitch,voltagetransformer,currenttransformer.Inadditiontothelightningprotectiondesignandcalculation,improvethewholesubstationsafety,attachamainwiringdiagram.Keywords:35KV,Substation,OveralldesignIII目录摘要..........................................................................................................................IAbstract.......................................................................................................................II目录.......................................................................................................................III前言......................................................................................................................-1-一、变电站站址的选择原则和作用................................................................-3-（一）变电站的选择原则....................................................................................-3-（二）变电所在电力系统的地位........................................................................-3-（三）电力系统供电要求..................................................................................-4-（四）电力系统运行的特点................................................................................-4-（五）电力系统的额定电压................................................................................-5-二、主接线设计................................................................................................-6-（一）对电气主接线的基本要求........................................................................-6-（二）所要选择的主接线形式..........................................................................-6-1.35KV、10KV接线形式的选择.....................................................................-6-三、负荷计算....................................................................................................-8-（一）计算负荷....................................................................................................-8-1.对于35KV段负荷的计算...............................................................................-9-2.对于10KV段负荷的计算.................................................................................-9-四、变电站主变压器的选择..........................................................................-10-（一）绕组数量和连接方式的确定................................................................-10-1.绕组数量确定原则.........................................................................................-10-2.连接方式的选择...............................................................................................-10-（二）主变阻抗及调压方式选择......................................................................-10-1.主变阻抗的选择...............................................................................................-10-2.调压方式的选择...............................................................................................-10-（三）变压器中性点接地方式和中性点设计....................