摘要摘要根据设计任务书的要求，本次设计为110kV变电站电气主接线的初步设计，并绘制电气主接线图。该变电站设有两台主变压器，站内主接线分为110kV、35kV和10kV三个电压等级。110KV电压等级采用双母线接线，35KV和10KV电压等级都采用单母线分段接线。本次设计中进行了电气主接线的设计、短路电流计算、主要电气设备选择及校验（包括断路器、隔离开关、电流互感器、电压互感器、母线、熔断器等）、各电压等级配电装置设计。本设计以《35～110kV变电所设计规范》、《供配电系统设计规范》、《35～110kV高压配电装置设计规范》等规范规程为依据，设计的内容符合国家有关经济技术政策，所选设备全部为国家推荐的新型产品，技术先进、运行可靠、经济合理。关键词：降压变电站；电气主接线；变压器；设备选型；无功补偿ⅠAbstractAbstractFromtheguideofengineeringdesignassignment,wehavetodesignprimarypower-systemof110kVsubstationanddrawmainelectricalone-linediagram.Therearetwomaintransformerinthesubstationinwhichmainelectricalconnectioncanbedividedintothreevoltagegrades:110kV,35kVwith10kV.Itdepositssectionalizedsinglebusbarschemepergrade.Thereisalsoadesignformainelectricalconnectioninthisengineering,thecalculationforshort-circuitelectriccurrent,theselectionofelectricaldeviceandcalibration(includingcircuitbreaker,isolator,currenttransformer,potentialtransformer,busbaretc.)andthedesignfordistributioninstallationper.voltagegrade,directcurrentsystemandlightningprotectionisalsoincludedKeywords:transformersubstation;electricalmainwiring;transformer;equipmenttypeselection;reactive-loadcompensationⅡ目录目录摘要·······························ⅠAbstact······························Ⅱ1变电站电气主接线设计及主变压器的选择··············11.1主接线的设计原则和要求··················11.1.1主接线的设计原则···················11.1.2主接线设计的基本要求·················21.2主接线的设计·······················31.2.1设计步骤·······················31.2.2初步方案设计·····················31.2.3最优方案确定·····················41.3主变压器的选择······················51.3.1主变压器台数的选择··················51.3.2主变压器型式的选择··················51.3.3主变压器容量的选择··················61.3.4主变压器型号的选择··················61.4站用变压器的选择······················91.4.1站用变压器的选择的基本原则··············91.4.3站用变压器型号的选择·················92短路电流计算··························102.1短路计算的目的、规定与步骤················102.1.1短路电流计算的目的··················102.1.2短路计算的一般规定··················102.1.3计算步骤·······················102.2变压器的参数计算及短路点的确定··············112.2.1变压器参数的计算···················112.2.2短路点的确定·····················112.3各短路点的短路计算····················122.3.1短路点d-1的短路计算(110KV母线)···········12Ⅲ目录2.3.2短路点d-2的短路计算(35KV母线)············132.3.3短路点d-3的短路计算(10KV母线)············132.3.4短路点d-4...
