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本科毕业设计（论文）题目名称：220kV变电站一次系统设计SouthwestUniversityofScienceandTechnology220kV变电站一次系统设计220kV变电站一次系统设计摘要变电站作为电力系统的重要组成部分，对电能的传输和分配起着举足轻重的作用。变电站设计是否合理，不仅影响投资和运行费用，还会影响供电可靠性和安全生产，它和企业经济效益、设备及人身安全等密切相关。本次设计主要介绍了220kV变电站的一次系统设计。首先根据原始资料，对可靠性、灵活性和经济性进行综合考虑，确定了220kV、110kV和10kV侧的电气主接线形式；然后根据负荷情况等对主变压器和站用变压器的容量和型号进行选择，并对主变压器的选择结果进行校验；之后绘制系统等值网络并根据各短路点进行网络化简，得出计算电抗后根据短路电流运算曲线表得到短路电流；然后再计算最大持续工作电流，并根据最大持续工作电流和短路电流值对断路器、隔离开关、电压互感器、电流互感器、导体等电气设备进行选择并校验热稳定和动稳定；最后对配电装置、继电保护和防雷接地设计等内容进行简单论述，最终完成了本次设计。关键词：220kV，变电站，变压器，主接线，短路计算SouthwestUniversityofScienceandTechnology220kV变电站一次系统设计220KVPRIMARYSUBSTATIONSYSTEMDESIGNABSTRACTAsanimportantpartoftheelectricpowersystem,thetransformersubstationplaysanimportantroleinthetransmissionanddistributionofelectricity.Ifthedesignofsubstationisreasonable,notonlyaffectstheinvestmentandoperationcost,andalsoaffectsthepowersupplyreliabilityandsafetyinproduction.Anditiscloselyrelatedtotheeconomicbenefits,equipmentandsafetyoftheenterprise..Thisdesignintroducesasystemdesignof220kVsubstation.Firstly,accordingtotheoriginaldata,thereliability,flexibilityandeconomyareconsidered,and220kV,110kVand10kVaredetermined.Themaintransformerandthestationareselectedaccordingtotheloadcondition,andtheselectionresultsofthemaintransformerareverified.Thenthenetworkofthesystemisplottedandthenetworkisbasedontheshortcircuitpoints,andthenthecalculationoftheelectricalresistanceisobtainedbytheshortcircuitcurrentoperationcurve.Andthencalculatethemaximumcontinuousworkingcurrent,andaccordingtothemaximumcontinuousworkingcurrentandshort-circuitcurrentvalueofcircuitbreaker,isolatingswitch,currenttransformer,voltagetransformer,conductorandotherelectricalequipmentselectionandcalibrationthermalstabilityanddynamicstability;Finally,thedesignofpowerdistributiondevice,relayprotectionandear-proofgroundingdesignwasdiscussedbriefly.Keywords：220kV,substation,transformer,mainconnection,shortcircuitcalculationSouthwestUniversityofScienceandTechnology220kV变电站一次系统设计目录第一章绪论--------------------------------------------------------------------------------------------------------11.1引言-------------------------------------------------------------------------------------------------------11.2原始资料分析------------------------------------------------------------------------------------------11.2.1课题内容----------------------------------------------------------------------------------------11.2.2原始资料----------------------------------------------------------------------------------------11.3本文主要工作------------------------------------------------------------------------------------------2第二章电气主接线设计----------------------------------------------------------------------------------------32.1电气主接线概述---------------------------------------------------------------------------------------32.2电气主接线的基本要求------------------------------------------------------------------------------32.3电气主接线设计与选择------------------------------------------------------------------------------42.3.1220kV侧接线形式----------------------------------------------------------------------------42.3.2110kV侧接线形式----------------------------------------------------------------------------62.3.310kV侧接线形式------------------------------------------------------------------------------82.4电气主接线形式图-----------------------------------------------------------------------------------10第三章主变压器与站用变压器的选择--------------------------------------------------------------------113.1主变压器的选择---------------------------------------------------------------------------------------113.1.1主变压器台数的选择-----------------------------------------------------------------------113.1.2主变压器容量的选择-----------------------------------------------------------------------113.1.3主变压器型式的选择-----------------------------------------------------------------------113.2主变压器的校验--------------------------------------------------------------------------------------133.3站用变压器的选择-----------------------------------------------------------------------------------143.3.1站用电源数量--------------------------------------------------------------------------------143.3.2站用电源容量--------------------------------------------------------------------------------14第四章站用电设计---------------------------------------------------------------------------------------------154.1站用电源引接方式-----------------------------------------------------------------------------------154.2站用变压器低压侧接线-----------------------------------------------------------------------------15第五章短路电流计算------------------------------------------------------------------------------------------165.1短路计算的目的--------------------------------------------------------------------------------------165.2短路计算的一般规定--------------------------------------------------------------------------------165.3短路计算步骤-----------------------------------------------------------------------------------------165.4短路电流计算-----------------------------------------------------------------------------------------165.4.1电路各元件电抗标幺值计算--------------------------------------------