沈阳工程学院毕业设计历城60KV降压变电所电气部分摘要历城变电所电气部分初步设计主要包括主接线的比较，短路计算，电气设备的选择，配电装置的布置以及防雷保护等。其中电气主接线是电气设计中最为重要的一环，文中通过对两种主接线的经济性、可靠性以及优缺点的比较，得出最适合本所要求的主接线；短路计算是设备选择的基础，网络变换，短路点的选择，以及元件参数的计算，根据这些选择适合本设计的电器设备。电气设备主要是针对高压电气设备而言，（包括母线、高压断路器、隔离开关、电流互感器、电压互感器、避雷器、补偿电容器等），文中详细介绍了各种电气设备的选择方法和校验方式；配电装置的布置和防雷保护是息息相关的，根据配电装置的设计原则和本所的具体情况，本次设计采用的是普通中型布置；而根据这种配电布置方式和面积，对于防雷保护的设计决定采用避雷针和避雷器来构成。当然文中也涉及了自动装置和继电保护的配置，并在适当位置附加了图纸（主接线图、平面图、断面图、防雷保护图等）以及表格、插图等方便阅读、理解。关键字电力系统，短路计算，设备选择，校验AbstractThegraduationthesisisaboutinitialdesigningofelectricalpartforthesubstationinAnjiang.Itmainlyincludesthecomparisonofchiefwiring,thecalculatingforshorting-current,thechoicefortheelectricalequipment,thearrangementforthedistributiondeviceandetc.Theelectricalchiefwiringisoneofthemostimportantlinksintheelectricaldesigning.Inthetext,bycomparingtheeconomic,reliability,advantage(disadvantage)forthetwokindsofchiefwirings,inordertogetthemostbeingrequired;Networktransformation,thechoiceforthepointofshort-circuit,thecalculatingfortheparameterofdeviceandetc,inthesesteps,eachoneneedstobecautious,otherwiseitwillbringtremendouseffecttothechoiceofequipment;Electricalequipment(highvoltage)includesbus,highvoltagebreaker,CT,PT,lightningarresterandcompensate-capacitor.Inthistextallkindsofequipments’choosingandproofreadingmethodsareintroduceddetailedly;Thearrangementforthedistributiondeviceisintegratewiththeprotectionfordefendingthunderandlightning,soaccordingtotheprincipleofplanandtheconcretesituationofthissubstation,Ichooseaarrangementplanofordinaryandmedium-sized,whileadoptlightningrodandlightningarrestertoconstitutetheprotectionfordefendingthunderandlightning.Ofcourse,thisarticlealsosimplyintroducesthedesigningfortheautomaticdeviceandtherelay’sprotection,meanwhileitaddsupsomedesigndrawing(chiefwiring’sdrawing,planefigure,sectiondiagram,thedrawingofprotectionfordefendingthunderandlightningandetc)tableandillustrationinordertoreadandunderstandmoreeasily.KeywordsPowerSystem,Shortcircuitcalculation,Equi