500kv变电站的设计摘要变电站是直接影响整个电力系统的安全性和经济性的一个重要组成部分，它是联系发电厂和用户的中间环节，起着变换和分配电能的作用。[1]本次毕业设计针对500kV变电站的特点，以电气设计部分为核心，通过分析拟建变电站的进出线方向和负荷等原始资料，从可靠性、安全性、经济性等其他方面的考虑，确定电气主接线方式，主变压器的容量、数量的确定，负荷分析及计算，以及短路电流的计算和变电所主要电气设备的选择（包括断路器，隔离开关，互感器等），并在选择时对电气设备进行了必要的计算和校验。同时，针对本次设计，完成相应图纸的绘制。[1][2]关键词：变电站；短路电流；电力系统ABSTRACTSubstationistheimportantpartofpowersystem,itdirectlyinfluencesthewholepowersystemsafeandeconomicoperationofthepowerplantandtheuser,istheintermediatelink,playsaroleintransformationanddistributionofelectricity.Thegraduationdesignfor500kVthecharacteristicsofsubstation,electricaldesignasthecore,throughtheanalysisofthesubstationandtheorientationofalineandloaddatafromtheoriginal,reliability,safety,economicandotheraspectstoconsider,determinethemainelectricalwiringmode.Mainlyfromthemaintransformercapacity,quantitydetermination,loadanalysisandcalculation,andtheshortcircuitcurrentcalculationandsubstationmainelectricalequipmentselection(includingcircuitbreaker,isolatingswitch,transformerandsoon),andthechoiceofelectricalequipmentisnecessarytocalculateandcheck.Atthesametime,accordingtothedesign,completethedrawing.Keywords:Substation；Shortcircuitcurrent；Powersystem目录摘要..................................................................IABSTRACT................................................................I1前言..................................................................12负荷统计及计算.........................................................22.1负荷统计.........................................................22.2负荷计算.........................................................23主变压器及电气主接线的选择............................................33.1主变压器的选择...................................................33.2主接线的设计.....................................................44短路计算...............................................................74.1短路电流计算.....................................................74.2短路电流和短路容量...............................................7I4.3短路