牵引变电所电气主接线设计

摘要根据要求本设计将采用AT供电方式，复线区段供电，单相V，v接线。通过负荷计算，完成供电臂的平均电流计算，有效电流计算，确定牵引主变压器容量并进行校核等，同时对主变压器的接线方式进行详细的说明。确定主接线方式，运用AutoCAD绘制出电气主接线图及平面图。进行短路计算，包括高压侧输电线短路、低压侧母线短路和牵引网短路的计算。根据短路计算结果选择变电所中的断路器、隔离开关、电流互感器、电压互感器等电气设备和低压侧母线型号的校验，以及避雷和接地装置的选择和校验，还要对高压电气设备的选择和校验。最后,进行牵引变电所的谐波的分析和无功功率补偿分析。本设计符合设计规范，满足运行要求，具有较强的实用性。关键词:牵引变电所负荷计算短路计算AbstractAccordingtotherequirementsthisdesignusestheATpowersupplymode,doubletrackpowerandtheconnectionformofsingle-phaseVvmode.Loadcalculationtodeterminethetractionofthemaintransformercapacity,thenumberofunitstoconductadetaileddescriptionofthewiringofthemaintransformer.Todeterminethemainwiring,useAutoCADtodrawthemainelectricalwiringdiagramsandfloorplans.Shortcircuitcalculation,includingthehighpressuresideofthetransmissionlineshort-circuit,thelowpressuresideofthebusshortcircuitandtractionnetworkshort-circuitcalculation.Selectedaccordingtoshort-circuitcalculationssubstationcircuitbreakers,isolationswitches,currenttransformers,voltagetransformersandotherelectricalequipmentandlow-voltagesideofthebusmodelcalibration,aswellaslightningprotectionandgroundingdeviceselectionandvalidation,butalsoonthehigh-pressureselectionandverificationofelectricalequipment.Thenthechoiceofthehigh-voltageelectricalequipmentandcalibrationaredone.Finally，theharmonicanalysisandreactivepowercompensationanalysisofthetractionsubstationaredone.Thedesignisinlinewiththenationalstandards,canmeettheoperationalrequirementsandgaingreatpracticality.Keywords:tractionsubstationloadcalculationshortcircuitcalculation目录第1章概论.........................................................................................................................11.1课题研究的目的意义............................................................................................11.2电气化铁道发展现状............................................................................................11.3牵引变电所介绍....................................................................................................21.4本设计的主要内容................................................................................................2第2章牵引变电所电气主接线设计和所址的选择.......................................................32.1电气主接线介绍....................................................................................................32.2牵引变电所主接线设计........................................................................................32.2.1电气主接线设计的基本要求..........................................................................32.2.2牵引变电所主接线的设计..............................................................................42.3牵引变电所所址的选择........................................................................................6第3章牵引变压器的选择和容量计算...........................................................................73.1牵引变压器的选择步骤........................................................................................73.2牵引变压器容量计算............................................................................................73.2.1供电臂1、2平均电流的计算........................................................................83.2.2供电臂1、2有效电流的计算......................................................................103.2.3变压器容量的计算........................................................................................113.2.4变压器校核容量的计算................................................................................113.2.5变压器安装容量的计算................................................................................12第4章短路计算.............................................................................................................134.1短路的原因及危害..............................................................................................134.2短路计算..............................................................................................................134.2.1一次侧短路计算............................................................................................154.2.2二次侧短路计算............................................................................................15第5章牵引变电所电气设备的选择及校验.................................................................175.1电气设备选择的一般原则..................................................................................175.2断路器的选择与校验..........................................................................................175.2.1六氟化硫断路器............................................................................................185.2.2真空断路器....................................................................................................185.3隔离开关的选择与校验......................................................................................205.4互感器的选择与校验..........................................................................................215.4.1电流互感器的选择与校验............................................................................215.4.2电压互感器的选择与校验...........................................................................225.5避雷器的选择......................................................................................................235.6防雷及接地......