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存档日期：存档编号：徐州师范大学本科生毕业论文（设计）论文题目：35KV企业变电所设备选型设计姓名：吴科庆院系：电气工程及自动化学院专业：电气工程及其自动化班级：09（Z）电气指导教师：姜来东徐州师范大学教务处印制I摘要随着电力行业的不断发展，人们对电力供应的要求越来越高，特别是供稳固性、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所的合理设计和配置。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35kV/10kV变电站。本设计主要从35kV变电所一次系统设计出发，对35kV变电所各个车间进行简单的设计和计算，作出了该区地面35kV变电所的初步设计。设计内容包括主接线的设计、负荷计算与变压器选择、高压电器的选择、变电所的防雷及变电所的布置等。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，完成了满足该区供电要求的35kV变电所初步设计。设计中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，考虑到短路对系统的严重影响，设计中进行了短路计算。设计中还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。关键词：35KV变电站总体设计IIAbstractWiththecontinuousdevelopmentofelectricpowerindustry,peopleonthepowersupplyofdemandishigherandhigher,especiallyforfixednessreliabilityandpersistenthowevergridfixednessreliabilityandpersistentoftendependsonreasonabledesignandconfigurationofthesubstationofatypicalsubstationsrequirementssubstationequipmentoperationandreliableoperationisflexibleeconomicrationalexpansionconvenientforthisinseveralaspectstoconsider,thispaperdesigneda35kV/10kVsubstationThisdesignmainlyfrom35kVsubstationbasedonfirstsystemdesign,simple35kVsubstationeachworkshop,thedesignandcalculating,madetheground35kVsubstationthepreliminarydesigndesigncontentincludingmainwiringdesignloadcalculationandtransformerchoicehighvoltageelectricalchoiceofsubstationoflightningprotectionandsubstationdecorateetcthisdesigntotheactualloadasthebasis,thebestoperationinsubstationbasedinaccordancewiththerelevantregulationsandstandard,andfinishedinthepowersupplyrequirementmeet35kVsubstationpreliminarydesignDesignofthefirstloadofstatisticsandcalculations,electedforthechangemodels,andthenloadaccordingtothenatureandreliabilityofelectricityforthedevelopmentofthewiringdesign,takingintoaccounttheshort-circuitseriousimpactonthesystemdesignofashort-circuitbasis.Designofthemainhighvoltageelectricalequipmentonthechoicesandcalculations,suchascircuitbreakers,isolationswitches,voltagetransformer,IIIcurrenttransformer.Inaddition,thedesignandcalculationofmine-protectedandenhancedthesecurityoftheentiresubstations.Keywords:35KV,Substation,OveralldesignIV目录摘要…………………………………………………………………………………………………ⅠAbstract……………………………………………………………………………………………Ⅱ1原始资料................................................71.1负荷原始资料...................................................71.2环境条件.......................................................72变电站站址的选择和作用..................................72.1变电站的选择原则...............................................72.2变电所在电力系统的地位.........................................82.3电力系统供电要求...............................................82.4电力系统运行的特点.............................................92.5电力系统的额定电压.............................................93主接线设计.............................................103.1对电气主接线的基本要求........................................103.2所要选择的主接线形式..........................................103.2.135KV、10KV接线形式的选择................................104负荷计算...............................................134.1计算负荷......................................................134.1.1对于35KV段负荷的计算...................................134.1.2对于10KV段负荷的计算...................................135变电站主变压器的选择...................................135.1绕组数量和连接方式的确定......................................135.1.1绕组数量确定原则........................................135.1.2连接方式的选择..........................................135.2调压方式的选择............................................145.3电容电流的计算................................................145.3.110KV侧电容电流的计算....................................145.4变压器中性点接地方式和中性点设计..............................145.4.110KV和35KV侧中性点接地方式的选择.......................155.5主变容量选择原则..............................................155.5.1本设计中主变容量的选择..................................155.5.2主变台数选择原则........................................166短路电流的计算.........................................166.1计算短路电流的意义............................................166.2短路电流计算的规定............................................16V6.3本次设计中短路电流的计算......................................176.3.1各回路电抗的计算........................................176.3.2计算各短路点的短路电流..................................187高压电器设备的选择.....................................197.1电器设备选择的一般原则........................................197.1.1按环境条件选择..........................................197.1.2按电网电压选择..........................................207.2高压断路器的选择原则..........................................207.2.1按工作环境选型..........................................207.2.2按额定电压选择..........................................207.2.3按额定电流选择..........................................207.2.4校验高压断路器的热稳定..................................207.2.5校验高压断路器的动稳定..................................217.3各电压等级侧断路器的选择......................................217.3.135KV侧断路器的选择......................................217.3.210KV侧断路器的选择......................................227.4隔离开关的选择................................................237.4.1隔离开关的作用..........................................237.4.235KV侧隔离开关的选择.........................