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1、本科生毕业设计（论文）摘要本次毕业设计是关于变电所的设计，用于变电站的供配电。变电站是电力系统的重要组成部分，它直接影响整个电力系统的安全与经济运行，是联系发电厂和用户的中间环节。本次设计有两个电压等级，进行了负荷统计和功率因数的补偿，选用两台SF9-20000/60变压器，采用单母线分段的总降压变电所主接线，并进行了短路电流计算，供电线路的选择与校验，主要供电设备选择，继电保护设计，防雷设计，接地保护等。该设计根据设计任务书的要求，拟定了两套主接线方案，并根据对主接线的基本要求，从技术上论证各方案的优缺点，最后采用了
2、内桥式接线方案；选择供电线路和供电设备时，采用了先按正常运行条件选择，后按短路条件校验的方法；在继电保护设计环节中，该设计确定了继电保护装置，并对保护装置做出整定计算；最后，根据变电所的技术要求，确定了避雷针等防雷设备的技术参数，并对接地装置做出了计算。在设计过程中要绘制相关图纸，包括电气一次主接线图等重要图纸。关键词：变电所；电气主接线；短路计算；继电保护IV本科生毕业设计（论文）AbstractThisgraduationprojectisaboutthetransformersubstationdesign,us
3、esinthetransformersubstationsupplyingthepowerdistribution.Substationisanimportantpartofpowersystem，itdirectlyaffectsthewholepowersystemsafetyandeconomicaloperation.Itistheintermediatelinkofthepowerstationandusers.Thisgraduationprojecthastwovoltageclass,andhascar
4、riedontheloadstatisticsandthepowerfactorcompensation.TwoSF9-20,000/60transformer,usesthesinglebusbarpartitionthetotalvoltagedroppingtransformersubstationmainwiring,theshort-circuitcurrentcomputation,supplyline'schoiceandtheverification,thechoicemaingeneratingpla
5、nt,therelayprotectiondesign,anti-radardesign,groundprotectionandsoon.Thisdesignbasisdesignprojectdescription'srequest,hasdrawnuptwosetofmainwiringplans,andaccordingtothemainwiring'sessentialrequirements,provesvariousplanstechnicallythegoodandbadpoints,finallyhas
6、usedinthebridge-typewiringplan;Whenchoicesupplylineandgeneratingplant,hasusedfirstaccordingtothenormaloperationconditionchoice,latteraccordingtoshortcircuitconditionverificationmethod;Intherelayprotectiondesignlink,thisdesignhaddeterminedtherelayprotectioninstal
7、lment,andmakestheinstallationcomputationtotheprotectivedevice;Finally,accordingtothetransformersubstationspecification,haddeterminedthelightningrodandsoonanti-radarequipment'stechnicalparameter,anddockedtheinstallmenttomakethecomputation.Mustdrawuptherelatedblue
8、printinthedesignprocess,includinganelectricalmainwiringdiagramandsoonimportantblueprint.Keywords：Substationdesign；Electricalwiring；Short-circuitcalculationIV本科生毕业设计（论
