220kV变电站设计-毕业设计

电气与电子信息学院毕业设计说明书题目220kV降压变电站电气一次部分设计专业：电气工程与自动化年级：2013级学生：学号：312013xxxxxxxxx指导教师：王萌完成日期：2017年5月25日西华大学毕业设计说明书220kV变电站电气部分设计摘要：本文是对220kV变电站进行电气部分的总体设计与综合规划。分析了相应的原始资料后，整理其相关数据，分别确立了220Kv，110kV以及10kV电压侧的主接线形式，使其满足电网稳定安全运行的基本条件。再根据负荷的数据确定其主变压器型号，台数与容量等。得到各元件的参数之后，再进行相应的网络简化，选择各电压侧的短路点进行短路电流计算，再根据最终的计算结果来选择和校验电气设备。同时本次设计简单的进行了相应的防雷接地设计以及配电装置的设计，最后再绘制了电气主接线图关键词:220kV，变电站，电气主接线，电气设备选择Abstract：Thispaperistheoveralldesignandcomprehensiveplanningoftheelectricalpartofthe220kVsubstation.Therawdatawereanalyzedtoextracttherelevantdataneededforthedesign,confirmedthemainconnectionformof220kV,110kV,35kVandtheelectricalsubstationmainconnectiontomeettherequirementsofreliability,flexibilityandeconomy.Accordingtotheloaddata,itdeterminestheunits,capacityandthemodelofthemaintransformerandtheparametersofeachelement.Bytheequivalentnetworksimplification,choicethepointsofshort-circuitandcalculatethecurrentofshort-circuit,thecalculationresultsasabasisforselectionofcircuitbreaker,transformer,busandotherelectricalequipment;Thispaperhascarriedonthesimpleintroductionandtheanalysistothelightningprotectiongroundingandthedistributionunit,finallyhascarriedontheelectricalmainwiringdiagramdrawing.Keywords：220kV,substation,electricalmainwiring,electricalequipmentselection西华大学毕业设计说明书I目录1.前言..................................................................11.1选题背景............................................................11.2国内外研究现状......................................................11.2.1国内研究动态................................................11.2.2国外研究动态................................................11.3本文研究内容........................................................22.原始资料..............................................................32.1站址地理位置介绍....................................................32.2建设性质和规模......................................................32.3负荷侧预测表........................................................33.电气主接线............................................................43.1主接线设计原则......................................................43.2主接线设计的基本要求................................................43.3电气主接线的选择比较................................................53.4电气主接线的最终方案选择.............................................84.主变压器的选择........................................................94.1主变压器的选择原则..................................................94.2主变压器的确定......................................................94.3主变压器的型号参数.................................................114.4站用变压器的选择...................................................115.短路电流计算.........................................................135.1短路的类型.........................................................135.2短路电流计算目的...................................................135.3短路电流计算方法...................................................135.4云南元阳拟建变电站的短路电流计算书..................................145.4.1变电站短路电流计算条件基本假定............................145.4.2基准值选取................................................145.6.3短路等值网络绘制..........................................15西华大学毕业设计说明书II5.6.4各元件参数标幺值计算.......................................165.6.5220kV母线短路电流计算.....................................185.6.6110kV母线短路电流计算.....................................205.6.710kV母线短路电流计算......................................225.8短路电流计算结果...................................................236.导体和电气设备的选择.................................................246.1高压断路器和隔离开关的选择和校验....................................246.1.1220kV侧断路器、隔离开关的选择和校验.......................256.1.2110kV侧断路器、隔离开关的选择和校验.......................286.1.310kV侧断路器、隔离开关的选择和校验........................306.2电流互感器、电压互感器的选择与校验.................................336.2.1220kV侧电流互感器、电压互感器的选择和校验.................346.2.2110kV侧电流互感器、电压互感器的选择和校验.................366.2.310kV侧电流互感器、电压互感器的选择和校验..................376.3导体的选择和校验...................................................396.3.1220kV侧母线选择和校验.....................................406.3.2110kV侧母线选择和校验.....................................416.3.310kV侧母线选择和校验......................................426.4电气设备选型汇总...................................................437.配电装置.............................................................447.1对配电装置的基本要求...............................................447.2配电装置的类型.....................................................447.3.1屋外配电装置...............................................447.3.2屋内配电装置..............................................457.4此次设计配电方式的采用............................................458．防雷保护设计与接地设计..............................................468.1防雷保护设计.......................................................468.2避雷器的选择与校验.................................................468.2.1220kV侧避雷器的选择和校验.................................47西华大学毕业设计说明书III8.2.2110kV侧避雷器的选择和校验.................................488.2.310kV侧避雷器的选择和校验..................................488.3避雷针的配置.......................................................498.4接地...............................................................499.结论.