搜索
I10kV变电站主接线的设计摘要在当今社会，电力行业占据主导地位，容易运输，容易转换，无污染。它是现代工业生产的主要能源和动力。已广泛地应用到一切生产部门和日常生活领域，成为社会发展不可缺少的动力。发电厂和用户间是经过变电站作连接桥梁的，在电力能源的改革和分派中起着独一无二的作用，电力体系的重要组成部分是由变电站组成的，影响着电力体制的安全保障和经济运行。电气主接线是电力体系的重要结构，高电流、高电压的变电站，是电力系统不可缺少的组成部分，同时是变电站电力系统运行与策划的主要内容。变电站是电压、控制和电能的转换的场所。变电站是发电厂和用户间的中间传输转换过程，在变电和配电中起着首当其冲的作用，直接关乎到着电力系统的安全保障和经济运转。通过对10kV变电站电气主接线的规划和分析，负载和用户进行了分析，并对用户的无功补偿装置是通过负荷计算确定。同时，选取各类变压器，剖析母线的各种接线方法从而选定了变电站的主接线方式，继而计算短路电流，选择导线，选择高压电气配置等。变电站在电力体系中占领主导地位，其电气主接线保障其可靠性。选择电气主接线设计对本专业知识进行巩固。关键词：母线；无功补偿；电气一次部分；继电保护；IIThemainwiringdesignof10kVsubstationAbstractIntoday'ssociety,theelectricpowerindustryoccupiestheleadingposition,thetransportationisconvenient,easytoswitch,nopollution.Itisthemainenergyandpowerofmodernindustrialproduction.Hasbeenwidelyusedinvariousindustriesofproductionanddailylife,becomeanindispensabledrivingforceforsocialdevelopment.Thefirstbridgeofthepowerplantandtheuserisasubstation,whichplaysanimportantroleinthetransformationanddistributionofelectricpower.Themaincomponentofthepowersystemiscomposedofthesubstation,whichaffectsthesafetyandeconomicoperationofthepowersystem.Electricalmainwiringisthemainstructureofthepowersystem,highcurrent,highvoltagesubstation,isthemaincomponentofthepowersystem,isthemaincontentofthesubstationpowersystemoperationanddesign.Thesubstationistheplacewherethevoltage,thecontrolandtheelectricenergyconversion.Thesubstationistheintermediatetransmissionandtransformationbetweenthepowerplantandtheuser,whichplaysanimportantroleinthesubstationanddistribution.Itisdirectlyrelatedtothesafetyandeconomicoperationofthepowersystem.Throughtheplanningandanalysisofthemainelectricalwiringofthe10kVsubstation,theloadandtheuserareanalyzed,andthereactivepowercompensationdevicefortheuserisdeterminedbytheloadcalculation.Atthesametime,chooseavarietyoftransformers,analysisofdifferenttypesofbuswiring,selectthemainconnectionmodeofthetransformersubstation,andthencalculatetheshort-circuitcurrent,selectthewire,selecthighvoltageelectricalequipment,etc..TheStatussubstationinthepowersystemisveryimportant，anditsmainelectricalcircuitshouldhavehighreliability.Selectthemainelectricalwiringdesigntoconsolidatetheprofessionalknowledge.Keywords:bus;reactivepowercompensation;electricalpart;relayprotection;III目录摘要........................................................................IAbstract...................................................................II第1章绪论...............................................................11.1变电所发展历史与现状................................................11.2电力系统主要构成原理................................................11.3变电所的设计原则....................................................21.4课题来源及设计背景..................................................2第2章变电站主接线.......................................................32.1对电气主接线的基本要求..............................................32.2电气主接线方式......................................................32.3电气主接线设计原则..................................................32.4主接线方案的分析....................................................42.4.1单母线接线方式.................................................42.4.2单母线分段主接线...............................................62.4.3双母线接线.....................................................62.4.4双母线分段接线.................................................72.4.5增设旁路母线的接线.............................................72.4.6单元接线方式...................................................82.4.7桥形接线.......................................................8第3章变电所负荷计算和无功补偿的计算....................................113.1变电站的负荷计算...................................................113.1.1负荷计算......................................................113.2无功补偿的目的和方案...............................................133.3无功补偿的计算及设备选择...........................................13第4章主变压器的选型....................................................154.1变压器选取原则.....................................................154.2选择变压器的类型...................................................154.3变压器台数的选择...................................................154.4变压器容量的选择...................................................16第5章短路电流的计算....................................................175.1概述...............................................................175.2短路电流计算的原因与目的...........................................175.3短路的种类.........................................................175.4三相短路电流的计算.................................................195.5尖峰电流的计算.....................................................225.5.1单台用电设备供电的支线尖峰电流计算............................225.5.2多台用电设备供电的线干尖峰电流计算............................22第6章变电所的一次系统设计..............................................236.1主要电气设备的选择.................................................236.1.1高压断路器的选择..............................................236.1.2高压隔离开关的选择............................................236.1.3高压熔断器的选择..............................................246.1.4电流互感器的选择..............................................24IV6.1.5电压互感器的选择......................................