住宅小区10kV供电系统设计

摘要I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和一个开闭所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。本次设计论文是以我国现行的各有关规范规程等技术标准为依据，所设计是一次初步设计，根据任务书提供原始资料，参照有关资料及书籍，对各种方案进行比较而得出。关键词配电室；短路计算；无功补偿；备用电源投入燕山大学本科生毕业设计（论文）IIAbstractThedesignofthisresidentialareaisthesubjectofthepreliminarydesignof10kVpowersupplysystem,thepowerdistributionsystem,therearetworoomsandanopeningandclosingaresidentialareaconsistingofadedicatedstep-downtransformersystemwith10kVand380V2avoltage,10kVand110kVsubstationsideoftheaccessbus10kV,380Velectricitymainlyforresidentialusers.Thepowersupplysystemdesignedisveryimportant,ifthesystemisbroken,theentireresidentialareawillaffectthepowersupply,sothehighreliabilityrequirements.Therefore,thedesignmusttakeintoaccountthepowersystemsecurity,reliabilityandeconomy.Thismanualwiringthroughthemainsubstationdesign,shortcircuitcurrentcalculation,themainelectricalequipmenttodeterminethemodelandparameters,electricalequipment,thedynamicthermalstabilitytest,automaticbackuppowersupplydesign,reactivepowercompensationdesign,lightningprotectionandovervoltageprotectionDevicecompletedindetailthedesignofsubstationsinpowersystem.Thisdesignthesisisbasedonourcurrentnormsoforderandotherrelevanttechnicalstandardsasthebasis,thedesignisapreliminarydesign,accordingtomandateoftheoriginalbooktoprovideinformation,referenceinformationandbooks,tocomparethevariousprogramswhichhavecome.KeywordsDistributionroom;Short-circuitcalculation;Reactivepowercompensation;BackupPowerInputIII目录摘要.......................................................................................................................IAbstract................................................................................................................II第1章绪论........................................................................................................11.1课题背景...............................................................................................11.2设计的目的和基本要求.......................................................................1第2章电气主接线的设计................................................................................32.1电气主接线设计的重要性...................................................................32.1.1电气主接线设计的重要性............................................................32.1.2电气主接线设计的步骤................................................................32.2开闭所及配电室位置和数量的设计...................................................42.3变电站主变压器的选择.......................................................................42.3.1主变压器的选择原则....................................................................42.3.2主变台数的确定............................................................................42.3.3主变压器容量的确定....................................................................52.3.4主变压器型号的确定....................................................................62.4电气主接线方案的设计.......................................................................72.4.1电气主接线的基本形式................................................................72.4.2各接线的适用范围........................................................................72.5供电系统主接线方案的设计...............................................................82.5.11#配电室主接线的设计.................................................................82.5.22#配电室主接线的设计.................................................................82.5.3开闭所的设计................................................................................82.6本章小结...............................................................................................9第3章短路电流计算........................................................................................103.1短路计算的目的及步骤.....................................................................103.1.1短路电流计算的目的..................................................................103.1.2短路电流计算的一般规定..........................................................103.1.3短路电流的计算步骤...................................................................11IV3.2短路电流的计算..................................................................................113.2.1短路计算过程...............................................................................113.2.2短路电流表....................................................................................123.2.2绘制系统等值阻抗网络图...........................................................133.3本章小结..............................................................................................13第4章电气设备的选择...................................................................................144.1电气设备选择的一般条件..................................................................144.1.1按正常工作条件选择...................................................................144.1.2按短路情况校验...........................................................................154.2各电气设备选择的原则..........