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1、摘要随着电力技术高新化、复杂化的迅速发展，电力系统在从发电到供电的所有领域中，通过新技术的使用，都在不断的发生变化。变电所作为电力系统中一个关键的环节也同样在新技术领域得到了充分的发展。根据设计任务书的要求，本次设计为110kV变电站电气一次部分初步设计，并绘制电气主接线图及其他图纸。首先，进行了电气主接线的选择，把电气主接线分为110kV、35kV和10kV三个电压等级，经过各个方案的优缺点比较，确定了各个电压等级分别采用单母线分段带旁母接线、单母线分段带旁母接线和单母线分段接线。其次，根据要求进行了主变压器的选择、短路电流计
2、算、主要电气设备选择及校验，包括断路器、隔离开关、电流互感器、电压互感器、母线等。最后，对防雷保护和接地方案的设计进行了选择。关键词：变电站；主变压器；防雷保护46ABSTRACTAlongwiththeeconomicdevelopmentandthemodernindustrydevelopmentsofquickrising,thedesignofthepowersupplysystembecomemoreandmorecompletelyandsystem.Becausethequicklyincreaseelectri
3、cityoffactories,italsoincreasesseriouslytothedependableindexoftheeconomiccondition,powersupplyinquantity.Thereforetheyneedthehigherandmoreperfectrequesttothepowersupply.WhetherDesignreasonable,notonlyaffectdirectlythebaseinvestmentandcirculatetheexpenseswithhavetheme
4、taldepletionincolourmetal,butalsowillreflectthedependableinpowersupplyandthesafeinmanyfacts.Inaword,itisclosewiththeeconomicperformanceandthesafetyofthepeople.Alongwiththehighandquickdevelopmentofelectricpowertechnique,electricpowersystemthencanchangefromthegenerateo
5、ftheelectricitytothesupplythepower.Fromtheguideofengineeringdesignassignment,wehavetodesignprimarypower-systemof110kVsubstationanddrawmainelectricalone-linediagramandothers.First,themainelectricalconnectioncanbedividedintothreevoltagegrades:110kV,35kVwith10kV.Itdepos
6、itssectionalizedsinglebusbarscheme,sectionalizedsingleandsectionalizedsinglebusbarschemepergrade.Second,thereisadesignformainelectricalconnectioninthisengineering,thecalculationforshort-circuitelectriccurrent,theselectionofelectricaldeviceandcalibrationincludingcircu
7、itbreaker,isolator,current，transformer,potentialtransformer,busbaretc.Atlast,thedesignfordistributioninstallationpervoltagegradeandlightningprotectionisalsoincluded.Keywords：substation;themaintransformer;lightningprotection46目录1引言11.1设计的目的与意义11.2负荷情况及分析11.3设计的任务22电气主
8、接线及设计32.1电气主接线设计的基本要求32.2主接线接线方式概述42.2.1110kV电气主接线62.2.235kV电气主接线82.2.310kV电气主接线93主变压器的选择113.1主变压器台数的确定113.2主变压器容量的选择113.3绕组数量和连接形式
