拉幅定型机生产线的供配电设计摘要供配电，贯穿了从发电开始到电力设备消耗电能的整个过程。供电和配电系统中的电能传输一般通过高压输电线路，母线，降压变压器，低压开关柜，低压配电箱和继电保护设备。其中的某个环节出现问题，都有可能造成停电事故、设备故障、产品报废，甚至威胁到人身安全等安全生产事故。如果电能生产和传输的各个环节都有条不紊的进行，电能质量得到保障，那么负荷用户就可以安全用电，保证设备正常运转。本次的设计是对拉幅定型机生产线进行供配电设计，在计算方面主要是对负荷的计算、无功功率的补偿以及短路电流的统计，之后是挑选电气主接线与电气设施，最后是防雷保护与继电保护。本次设计在给定原始资料的基础上进行了拉幅定型机生产线供配电系统负荷计算。在负荷计算的基础上，发现本供电系统负荷的功率因数偏低，造成电能的浪费，所以可以开展无功功率补偿统计，挑选无功补偿设施。根据负荷统计结论，确定了两台变压器，型号为S11-1250，互为备用。在电气主接线的设计中，可靠性，灵活性和经济性是主要基础。综合考虑本设计实际新情况，对比了各种电气主接线方案，最终确定了10kV高压侧和0.4kV低压侧都采用单母线分段接线，采用双电源供电。本次设计采用标幺值进行了短路计算，计算出了高压侧母线、低压侧母线短路点的稳态电流和冲击电流、短路容量。在短路电流基础上，选择校验了各种电气设备。关键字：变电所；主接线；短路计算；电气设备；DesignofpowersupplyanddistributionfordrawingframeAbstractForpowerdistribution,thewholeprocessofelectricalenergyconsumptionfromgenerationtogeneration.Thepoweristransmittedinthepowersupplyanddistributionsystem.Itisgenerallyexperiencedthroughhigh-voltagetransmissionlines,buslines,step-downtransformers,low-voltageswitchgear,low-voltagedistributionboxes,relayprotectionequipment,etc.Problemsinoneoftheselinkscancausepowerfailure,equipmentfailure,productscrapping,andevensafetyproductionaccidentssuchaspersonalsafety.Iftheelectricalenergyproductionandtransmissionofeachlinkisinanorderlymanner,thepowerqualityisguaranteed,thentheloaduserscansafelyuseelectricitytoensurethenormaloperationoftheequipment.Thisdesignistopowersupplydesignofstentersettingmachineproductionline,mainlyintermsofcalculationoftheloadcalculation,reactivepowercompensation,andthecalculationofshort-circuitcurrent,thenthechoiceofthemainelectricalwiringandtheselectionofelectricalequipment,andatlastthelightningprotectionandrelayprotection.Onthebasisofgivenrawmaterials,thedesigniscarriedouttocalculatetheloadofpowerdistributionsystem.Onthebasisofloadcalculation,itisfoundthatthepowerfactoroftheloadofthepowersupplysystemislow,whichcausesthewasteofelectricenergy,sothereactivepowercompensationcalculationiscarriedout,andthereactivepowercompensationdeviceisselected.Accordingtotheresultofloadcalculation,twotransformersareidentified,andthemodeliss11-1250,whichisusedasabackup.Thedesign,themainelectricalwiringreliability,flexibility,economyasthemainbasis,consideringthesituationofnewinthisdesign,comparesthevariousmainelectricalwiringschemes,finallydeterminesthe10kVhigh-voltagesideand0.4kVlow-voltagesidebyasinglebussectionofwiring,withdoublepowersupply.Inthisdesign,thenominalvalueisusedforshort-circuitcalculation,andthesteady-statecurrentandshockcurrentandshortcircuitcapacityoftheshort-circuitpointofthehighvoltagesidebusandlow-voltagesidebusarecalculated.Onthebasisofshortcircuitcurrent,variouselectricalequipmentisselected.Keywords:substation;Themainwiring;Shortcircuitcalculation;Electricalequipment;Lightningprotectiongrounding;Loadcalculation目录摘要.......................
