河南机电高等专科学校毕业设计/论文I摘要根据设计任务书的要求，本次设计为110kV变电站电气一次部分初步设计，并绘制电气主接线图及其他图纸。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。各个电压等级分别采用单母线分段接线、单母线分段接线和单母线分段接线。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、母线等)、各电压等级配电装置设计、直流系统设计以及防雷保护的配置。关键词：变电站设计防雷保护ABSTRACTFromtheguideofengineeringdesignassignment,wehavetodesignprimarypower-systemof110kVsubstationanddrawmainelectricalone-linediagramandothers.Therearetwomaintransformerinthesubstationinwhichmainelectricalconnectioncanbedividedintothreevoltagegrades:110kV,35kVwith10kV.Itdepositssectionalizedsinglebusbarscheme,sectionalizedsingleandsectionalizedsinglebusbarschemepergrade.Thereisalsoadesignformainelectricalconnectioninthisngineering,thecalculationforshort-circuitelectriccurrent,theselectionofelectricaldeviceandcalibration(includingcircuitbreaker,isolator,current，transformer,potentialtransformer,busbaretc.)andthedesignfordistributioninstallationper.voltagegrade,directcurrentsystemandlightningprotectionisalsoincluded.KeyWords：substationdesignlightningprotection河南机电高等专科学校毕业设计/论文2目录绪论................................................................1第1章变电站总体分析...............................................21.1变电站总体分析..................................................2第2章负荷分析计算与主变压器的选择.................................41.2负荷分析计算...................................................41.3主变选择.......................................................61.4无功补偿.......................................................8第3章电气主接线设计...............................错误!未定义书签。3.1主接线的设计原则和要求........................................113.2主接线的设计步骤...............................错误!未定义书签。3.3电气主接线设计.................................错误!未定义书签。第4章短路电流计算及电气设备选择...................错误!未定义书签。4.1短路电流的危害.................................错误!未定义书签。4.2电气设备选择...................................错误!未定义书签。4.3高压断路器的选择..............................................184.4隔离开关的选择...............................................194.5电压互感器选择................................................194.6电流互感器选择................................................204.7绝缘子和穿墙套管...............................错误!未定义书签。4.8电气设备表.....................................错误!未定义书签。第5章配电装置及电气总平面布置设计................错误!未定义书签。5.1概述...........................................错误!未定义书签。5.2配电装置的确定.................................错误!未定义书签。5.3电气总平面布置................................................2.5第6章防雷保护设计................................................276.1变电站的防雷保护特点..........................................276.2变电站直击雷防护..............................................276.3侵入波过电压防护..............................................27第7章避雷针保护范围的计算方法...................................28第8章展望………………………………………………………………….…….29致谢............................
