住宅小区10kV供电系统设计-(河南理工大学毕业设计)

摘要本次所设计的课题是住宅小区10kV供电系统的初步设计，该供电系统是有两个配电室组成的住宅小区专用的降压变电系统，具有10kV和380V两个电压等级，10kV一侧接与110kV变电站的10kV母线，380V主要用于小区用户的用电。本次所设计的供电系统是非常重要的，如果系统出故障了，将影响整个住宅小区的供电，所以可靠性要求很高。所以这次设计必须考虑到供电系统的安全性、可靠性及经济性。本说明书通过对变电站的主接线设计，短路电流计算，主要电气设备型号和参数的确定，电气设备的动热稳定校验，备用电源的自动投入设计，无功补偿设计，防雷和过电压保护装置的设计较为详细地完成了电力系统中变电站的设计。关键词：配电室；短路计算；无功补偿；备用电源投入AbstractThedesignofthisresidentialareaisthesubjectofthepreliminarydesignof10kVpowersupplysystem,thepowerdistributionsystem,therearetworoomsandanopeningandclosingaresidentialareaconsistingofadedicatedstep-downtransformersystemwith10kVand380V2avoltage,10kVand110kVsubstationsideoftheaccessbus10kV,380Velectricitymainlyforresidentialusers.Thepowersupplysystemdesignedisveryimportant,ifthesystemisbroken,theentireresidentialareawillaffectthepowersupply,sothehighreliabilityrequirements.Therefore,thedesignmusttakeintoaccountthepowersystemsecurity,reliabilityandeconomy.Thismanualwiringthroughthemainsubstationdesign,shortcircuitcurrentcalculation,themainelectricalequipmenttodeterminethemodelandparameters,electricalequipment,thedynamicthermalstabilitytest,automaticbackuppowersupplydesign,reactivepowercompensationdesign,lightningprotectionandovervoltageprotectionDevicecompletedindetailthedesignofsubstationsinpowersystem.Keywords:Distributionroom;Short-circuitcalculation;Reactivepowercompensation;BackupPowerInputI目录1.绪论.................................................................................................................................11.1课题背景.....................................................................................................................11.2设计的目的和基本要求.............................................................................................11.3本次小区供配电设计的主要内容.............................................................................22.住宅小区的负荷计算...................................................................................................32.1负荷的分类及供电要求.............................................................................................32.1.1电力负荷的含义...................................................................................................32.1.2按对供电可靠性要求的负荷分类......................................................................32.1.3按工作制的负荷分类..........................................................................................42.1.4本设计的负荷.......................................................................错误!未定义书签。2.2小区负荷计算..............................................................................错误!未定义书签。2.2.1本小区户型说明...................................................................错误!未定义书签。2.2.2住宅小区住户照明用电负荷的计算方法...........................错误!未定义书签。2.2.2其他负荷的计算方法...........................................................错误!未定义书签。2.2.3详细负荷计算.......................................................................错误!未定义书签。3.小区变配电方案............................................................................错误!未定义书签。3.1箱式变压站与环网柜的选择......................................................错误!未定义书签。3.1.1变压器的台数与容量的确定...............................................错误!未定义书签。3.1.2主变压器型号的确定...........................................................错误!未定义书签。3.1.3环网柜的选择.......................................................................错误!未定义书签。4.短路电流计算.............................................................................................................194.1短路计算的目的及步骤...........................................................................................194.1.1短路电流的原因与危害....................................................................................194.1.2短路电流计算的目的........................................................................................204.1.3短路电流计算的一般规定................................................................................204.1.4短路电流的计算步骤........................................................................................214.2短路电流的计算.......................................................................................................224.2.1短路计算过程....................................................................................................225.电气设备的选择.........................................................................................................245.1电气设备选择的一般条件.......................................................................................245.1.1按正常工作条件选择........................................................................................245.1.2按短路情况校验................................................................................................255.2各电气设备选择的原则...........................................................................................265.2.1断路器的选择原则............................................................................................265.2.2电流互感器的选择............................................................................................275.2.3电压互感器的选择............................................................................................29II5.3其它辅助设备选型.....................