110kV变电站电气一次部分初步规划设计专项方案

摘要依照设计任务书规定，本次设计为110kV变电站电气一次某些初步设计，并绘制电气主接线图及其她图纸。该变电站设有两台主变压器，站内主接线分为110kV、35kV和10kV三个电压级别。各个电压级别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设计、短路电流计算、重要电气设备选取及校验（涉及断路器、隔离开关、电流互感器、电压互感器、母线等）、各电压级别配电装置设计、直流系统设计以及防雷保护配备。核心词：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选取......................................................................42.1负荷分析计算..........................................................................................................42.2主变选取..................................................................................................................62.3无功补偿.................................................................................................................8第3章电气主接线设计...............................................................错误!未定义书签。3.1主接线设计原则和规定........................................................................................113.2主接线设计环节.......................................................................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取.......................................错误!未定义书签。4.1短路电流危害..........................................................................错误!未定义书签。4.2电气设备选取...........................................................................错误!未定义书签。4.3高压断路器选取....................................................................................................184.4隔离开关选取........................................................................................................194.5电压互感器选取....................................................................................................194.6电流互感器选取....................................................................................................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配电装置拟定..........................................................................错误!未定义书签。5.3电气总平面布置...................................................................................................25第6章防雷保护设计................................................................................................276.1变电站防雷保护特点............................................................................................276.2变电站直击雷防护................................................................................................276.3侵入波过电压防护................................................................................................27第7章避雷针保护范畴计算办法...........................................................................28第8章展望...............................................................................................................29道谢................................................................................................................................30参照文献..........................................................................................错误!未定义书签。附录Ⅰ短路电流计算....................................................................错误!未定义书签。附录Ⅱ电气设备选取..................................................................................................38附录Ⅲ避雷针保护范畴计算.....................................................................................58绪论本文一方面依照任务书上所给系统与线路及所有负荷参数，分析负荷发展趋势。从负荷增长方面阐明了建站必要性，然后通过对拟建变电站概括以及出线方向来考虑，并通过对负荷资料分析，安全，经济及可靠性方面考虑，拟定了110kV、35kV、10kV以及站用电主接线，然后又通过负荷计算及供电范畴拟定了主变压器台数，容量及型号，同步也拟定了站用变压器容量及型号；最后，依照最大持续工作电流及短路计算计算成果，对高压熔断器、隔离开关、母线、绝缘子和穿墙套管、电压互感器、电流互感器进行了选型，从而完毕了110kV电气一次某些设计。按照先行原则，根据远期负荷发展，决定在本区兴建一所中型110kV变电站。本设计属中间变电站该变电所建成后，,它重要任务是把110KV变成35kV和10kV电压供周边城乡使用。WH市郊110kV变电站是地区性都市变电站，它由系统1和系统2供电，同较为紧密，在整个系统中占有重要地位。变电站重要设备构成重要有主变压器、电气主接线