电气工程设计(课程设计)

华侨大学厦门工学院电气工程设计（课程设计）题目：3×120MVA闽北220kV变电站初步设计（电气主接线及所用电设计部分）队长：廖斌队员：黄宇鸿、李智灵专业系别：电气工程与自动化年级：2009级指导教师：（签名）2012年11月26日3×120MVA闽北220kV变电站初步设计—电气主接线及所用电设计部分I3×120MVA闽北220kV变电站初步设计—电气主接线及所用电设计部分摘要根据任务书设计邵武220kV变电站。该变电站主要是缓解邵武地区电网压力。本设计的重点是220kV变电站的电气一次部分。本设计主要分成电气主接线的设计，短路电流的计算以及电气设备的选择。电气主接线部分是设计的基础部分，本部分通过对任务书的分析确定了变电所主变压器台数、容量、型式，然后通过综合比较各种接线方式的特点、各自的优缺点，在可靠性、灵活性等技术比较后初步确定两种较优的接线方式再经过综合投资和年运行费用的经济比较选择最终的接线方式。变电所所用电设计主要是确定所用电电压等级，变电所主变压器台数、容量与型式，设计变电所所用电接线方式并对所用电接线方式进行说明。短路电流的计算是很重要的一个部分，它为选择断路器，隔离开关等电气设备做准备；电气设备的选择是根据短路电流的计算结果选择线路，电流互感器，电压互感器，断路器，熔断器，避雷器等电气设备并进行校验。关键词：220kV变电站，电气主接线，短路电流，选择，校验II3×120MVANorthFujianpreliminarydesignof220kVSubstation——MainElectricalwiringdesignandthedesignoftheelectricityAbstractAccordingtothetaskofdesigningShaowu220kVsubstation.ThesubstationisthemainregionalpowergridShaowueasethepressure.Thefocusofthisdesignis220kVelectricalsubstation.thisdesignisgenerallydividedintotwomainelectriccabledesign,calculationofthecurrentshort-circuitelectricalequipmentandthechoice.ElectricalwiringthemainpartofthedesignisthebasisofthispartofthemissionthroughtheanalysisofthemaintransformersubstationofTaiwan,capacity,form,andthenpassedthroughacomprehensivecomparisonofvariouscharacteristicsoftheconnectionmode,theirrespectiveadvantagesanddisadvantages,reliable,Flexibility,andothertechnicalcomparisonofthetwopreliminarydeterminetheoptimumconnectionmodeagainafterthecomprehensiveinvestmentandoperatingcostsintheeconomyisrelativelyselectthefinalconnectionmode.Bythemainelectricitysubstationdesignisdeterminedbythevoltageofelectricity,themaintransformersubstationofTaiwan,capacityandform,designedbytheelectricitysubstationconnectionmodeandtheelectricitywiringthatway.Short-circuitcurrentcalculationisaveryimportantpartofitfortheselectionofcircuitbreakers,switchesandotherelectricalequipmentisolationtopreparefortheequipmentorthetechnicalrequirementsputforward;electricalequipmentchoicewasbasedontheresultsofshort-circuitcurrentchoiceofroutes,currenttransformers,Voltagetransformers,circuitbreakers,fuses,surgearrestersandotherelectricalcomponentsandcalibration.Keywords:220kVsubstation,themainelectricalwiring,short-circuitcurrent,selection,validation3×120MVA闽北220kV变电站初步设计—电气主接线及所用电设计部分III目录中文摘要…………………………………………………………………………………………ⅠAbstract…………………………………………………………………………………………Ⅱ目录········································································································1第1章设计内容··························································································21.1设计的依据·························································································21.2电力系统概况······················································································2第二章电气主接线·······················································································32.1电气主接线设计的基本要求和基本原则······················································32.2变电所主变压器台数、容量、型式的选择··················································32.3电气主接线方案拟定及技术经济比较························································6第三章所用电接线的设计·············································································173.1变电所所用电电压等级确定···································································173.2变电所所用变压器台数、容量选择··························································173.3变电所所用电接线方式·········································································183.4变电所所用电源的引接·········································································18第四章短路电流的计算················································································194.1短路电流计算的目的和条件···································································194.2计算步骤及计算结果············································································20第五章电气设备选择·················································································275.1母线的选择························································································285.2220kV与110kV电气设备选择·······························································325.310kV设备选择···················································································41第六章电气设备布置···················································································446.1变电所电气总平面布置设计要求·····························································446.2配电装置设计的基本要求······································································446.3配电装置的分类··················································································446.4变电所总平面布置···············································································44小结·········································································································46致谢··············································································································47参考文献········································································································48附录··············································································································493×120MVA闽北220kV变电站初步设计—电气主接线及