摘要煤炭能源是国民经济发展中重要的因素之一。煤炭在我国一次能源生产和消费结构中占据70%以上的比例。并且随着国民经济的讯速发展和工业现代化的不断推进对电力系统的需求也不断提高。因此对于电力系统的重要组成部分——变电站也要不断更新。本设计对35kv四老沟煤矿地面变电站进行了全面的改进和设计。本设计对四老沟矿包的自然气候地理环境等因素进行详细分析，来确定变电所位置和供电电源；对电气主接线的选择、高压设备的选择与校验、负荷计算、短路电流计算，各种继电保护整定计算和选择皆有详细的说明。特别对主结线的选择，变压器的选择，还有一些电气设备如断路器、电压互感器、电流互感器等的选择校验作了仔细的分析和说明。最后进行了变电站的运行维护。关键词：35kv变电站、主结线选择、计算负荷、短路电流、运行维护、高压电气设备选择；ABSTRACTPositiveenergyisoneofthemostimportantfactorinthedevelopmentofnationaleconomy.CoalinprimaryenergyproductionandconsumptionstructureinChinahasoccupiedmorethan70%oftheproportion.Andwiththerapiddevelopmentofnationaleconomyandtheadvancementofindustrialmodernization,totherequirementofpowersystemalsocontinuetoimprove.Soforthepowersystemisanimportantpartofsubstationwillbeconstantlyupdating.Thisdesignforthesilaogou35kvtransformersubstationcomprehensivedesignandimprovement.Thisdesigntothesilaogoupackageofgeographicalenvironment,climateandothernaturalfactorsareanalyzed,Todeterminethepowersupplyandsubstationlocation;Themainconnectionofchoice,thechoiceofhigh-voltageequipment,loadcalculation,short-circuitcurrentbasis,theprotectionofvariousoptionsandsettingcalculationtherearedetailedinstructions,inparticularthechoiceofthemaincable,choice,therearesomeelectricalequipmentsuchascircuitbreakers,currenttransformers,highvoltagetransformer,andsothechoiceofcheckingadetailedanalysis.Keywords:35kvsubstation；themainconnectionofchoice；loadcalculation,short-circuitcurrentbasis；lightningprotectiongrounding；Thechoiceofelectricalequipment.目录1、供电电源及供电方式的确定.....................................................................................................11.1矿井概述：.........................................................................................................................11.1.1自然地理环境..........................................................................................................21.2变电所位置.........................................................................................................................21.2.1变电所设置..............................................................................................................21.3供电电源确定.....................................................................................................................31.3.1电源确定..................................................................................................................32、变电所负荷统计与主变压器的选择.........................................................................................72.1矿井电力负荷统计.........................................................................................................72.2无功功率............................................................................................................................72.2.1全矿补偿前自然功率因素......................................................................................72.2.2拟定Cosφ提高到0.95..............................................................
