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1、当今社会化石燃料已经成为主要能源,而电能已经也已成为人们生活中不可或缺的二次能源,电能是清洁的,许多企业对电量的需求特别大,特别是钢铁、冶金、石化行业的工业企业,对供配电可靠性的耍求尤为高,所以对企业供配电系统的研究显得尤为必要。本文以某钢铁公司的供配电系统为研究对象,首先,论文全面阐述了课题的背景与意义,同时简要叙述了一下设计的主要内容。然后通过需要系数法分析负荷的情况,明确负荷等级,确定功率I大I素的大小,再通过功率因素进行无功补偿,从而选择主变压器的型号,进行系统主接线设计。确定好方案后再进行两台变
2、压器并列运行时的短路计算,统计结杲成表,再表格结杲进行主耍元件的选择与校验,我们通常是在正常运行条件下进行设备选型,在短路条件下开始对设备进行校验,包括母线、断路器、互感器、配电柜和避雷器的选择与校验,选择符合要求的设备。最后一个章节我是想对本企业设计一个保护,包括主变压器继电保护原理的设计和接地保护的设计,从而保证了钢铁企业供配电生产的安全可靠,提高了企业生产的效率。关键词:负荷计算;短路计算;继电保护ABSTRACTToday'ssocietyhasbecomeamajorfossilfuelener
3、gy,andenergyhasalsobecomeanintegralpartoflifesecondaryenergy,cleanenergy,manycompaniesparticularlylargedemandforelectricity,especiallyinironandsteel,metallurgy,petrochemicalindustry,industrialbusiness,supplyanddistributionreliabilityrequirementsisparticul
4、arlyhigh,sotheenterpriseforresearchanddistributionsystemisparticularlynecessary.Inthispaper,asteelcompanyssupplyanddistributionsystemforthestudy,firstofall,acomprehensivepaperdescribesthebackgroundandsignificanceofthesubject,alongwithabriefdescriptionofth
5、emaincontentaboutdesign.Thenweneedtofactoranalysisload,cleartheloadlevelstodeterminethesizeofthepowerfactor,reactivepowercompensationandthenbythepowerfactorinordertoselectthemaintransformermodel,thesystemmainwiringdesign.Determineagoodplanandthenshort-cir
6、cuitthetwotransformersinparallelcomputingruntimestatisticsintoatable,andthenselectthedeviceandchecktheresultsofthecalculationusingloadandshort-circuitcurrentcalculation,withnormaloperatingconditionsourchoices,withshort-circuitconditionsvalidation,includin
7、gbus,circuitbreakers,transformers,powerdistributioncabinetsandarresterselectionandvalidation,toelectqualifiedelectricalequipment,designedthesecondarycircuit.Finally,protectiondesign,includingdesignandgroundprotectiondesignprinciplesofthemaintransformerpro
8、tection,thusensuringtheproductionofironandsteelenterprisesupplyanddistributionofsafe,reliable,improveproductionefficiency.Keywords:loadcalculation;Shortcircuitcalculation;Relayprotection1绪论11.1课题的背景及意义11.2设计的主要内容12工