大学毕业论文译文模板

译文原文题目：Industrialenterprisesofreactivepowercompensation译文题目：无功补偿学院：电子信息学院专业班级：电气工程及其自动化201***级**班学生姓名：######学号：41003040209(空一页)西安工程大学本科毕业设计（译文）1IndustrialenterprisesofreactivepowercompensationFrom:PowerSystemAnalysisandDesignAbstract-Theimprovementofindustrialenterprisesistoimprovethepowerfactorofelectricpowerefficiency，animportantmeansofsavingenergy.Inthispaper，theoreticalanalysisandapplicationexamplesoftheindustrialenterprises，thesignificanceofreactivepowercompensationandtheroleandviewofthecurrentpowersystem，industrialenterprises，theproblemsfortheproposedimprovementsandmeasures.I.INTRODUCTIONInindustrialenterprises，thevastmajorityofelectricalequipmentbelongstoperceptualload，thesedevicesinoperationtoabsorbalargenumberofreactivepower.Anincreaseinreactivepowersupplysystempowerfactortolowersystemvoltagedroptooccur，electricalequipmentnotfullyutilized，increasinglinelossesandlower-poweredequipment，powersupplycapacityandsoon.InsitureactivepowercompensationandthusimprovethepowerfactoroftheEnergyConservationhasextremelyimportantsignificance.II.ThechoiceofmethodofcompensationCompensationforreactivepowercompensationisdividedintocentralizedanddecentralizedcompensationforthreekindsofcompensationandinsitu.Focusoncompensation，thatis，highandlowvoltagepowerdistributionsetupbyseveralgroupswithinthecapacitor，capacitorconnectedtothepowerdistributionbus，thecompensationforthedistributionofpowerwithinthereactivepower，andtoreachtherequiredvalueofthetotalpowerfactorabove.Thismethodofcompensationcancompensateforhighandlowvoltagebusroutespriortothereactivepower，whichisequivalenttothereactivepowersourcetomovetheelectricitydistributioncompanies，allowinguserstopowerthesystemrequirementsforreactivepowerhasbeenreductioninthe西安工程大学本科毕业设计（译文）2electricitysectortoachievetherequiredpowerfactor.Andtheirdistributionwithintheenterprisebusfollowingthelineoftransformerandreactivepowercompensationcannotplayarole，thereisstillalargenumberofreactivepowerlineflowswithintheenterpriseandgeneratelosses.Dispersioncompensationisthecapacitorswereinstalledatvariousworkshopsattheswitchboard，whichwillenableinstallationofdistributiontransformerandthesubstationtotheplantlinescanbeduetoadecreaseinreactiveloadcompensationeffect.Localcompensationisthereactivepowercompensationdevicedirectlyconnectedtotheinductionmotorterminalsonthesideorintotheline.Focusoncompensationmethodsusedinthecapacityofcapacitorcompensationorin-placethanthegroupingofcompensationshouldbesmall，itsutilizationrateisevenhigherdisadvantageisthechangeindistributionhasnotbeencompensatedbythefeeders，onlylightenedtheloadreactivepowergrid.Dispersioncompensationinthewaytheutilizationofcapacitorcompensationthantheinsituhigh，sothetotalrequirementofcompensationissmallerthanthespotisaneconomicalandreasonableremedy.Reactivepowercompensationshouldfollowtheoverallplanning，rationaldistribution，classificationofcompensation，in-placebalance;focusoncompensationanddispersioncompensationcombinetospread-basedcompensation;highcompensationandlowvoltagecompensationcombinedwithlow-pressure-basedcompensation;Regulatorcombinedwithlowerlosses，downarethemainlossprincipleIII.ThechoiceofmethodofcompensationInthepowergridinthereactivepowerconsumptionisabig，about50%ofthereactivepowerconsumedintransmission，transformationandthedevice，50%oftheconsumedelectricityusers.Inordertoreducereactivepowerconsumption，itisnecessarytoreducethereactivepowerinthegridwhereflow.Thebestwaytostartfromtheusertoincreasereactivepowercompensation，improveuserloadpowerfactor，sothatGeneratorreactivepowercanbereducedandthereductionoftransmission，transformationanddistributionequipmentinthereactivepowerconsumption，soastoachievethepurposeofreducingwearandtear[2].CompensationforreactivepowercapacityofQcfor西安工程大学本科毕业设计（译文）322121111coscoscavQPIV.TheroleofreactivepowercompensationdeviceLoadchangescanbedecidedaccordingtothestaticordynamiccompensationmode.Whentheloadchangeisrelativelystable，weshouldusethestaticmethodofcompensation，whichcannotonlyreducethelinelosses，andinvestment;whentheloadchangeislarge，dynamiccompensationmethodshouldbeused，stablevoltage.西安工程大学本科毕业设计（译文）4无功补偿From:PowerSystemAnalysisandDesign摘要：改善工业企业用电的功率因数是提高用电效率、节约电能的重要手段。本文通过理论分析和应用实例说明了工业企业无功补偿的意义和作用，并针对目前工业企业供用电系统存在的问题，提出了改进意见和措施。关键词：补偿方式；1．引言在工业企业中，绝大多数的用电设备属于感性负荷，这些设备在运行中要吸收大量的无功功率。无功功率的增加使供电系统的功率因数降低，从而出现系统电压下降、电气设备得不到充分利用、增加线路损耗以及降低供电设备的供电能力等情况。因而就地进行无功补偿、提高功率因数对降损节能有着极为重要的意义。2．补偿方式的选择无功补偿分为集中补偿、分散补偿和就地补偿三种。集中补偿，即在高、低压配电所内设置若干组电容器，电容器接在配电母线上，补偿该配电所供电范围内的无功功率，并使总功率因数达到规定值以上。这种补偿方式只能补偿高、低压母线之前线路上的无功功率，它们相当于把无功功率源移到用电企业的配电所，使用户对供电系统要求的无功功率有所减少，达到供电部门所要求的功率因数。而它们对配电母线以下的企业内部的变压器和线路的无功功率不能起到补偿作用，仍有大量的无功功率在企业内部线路上流动并产生损耗。分散补偿是将电容器组分别安装在各个车间的配电盘处，这种安装方式可以使配电变压器以及变电所至车间的线路都可以由于无功负荷的减少而获得补偿效果。就地补偿是把无功补偿器直接接在异步电动机旁或进线端子上。集中补偿方式所用电容器组的容量较分组补偿或就地补偿要小，它的利用率则更高，缺点是对变、配电所各馈线并未得到补偿，仅减轻了电网的无功负荷。分散补偿方式中的电容器组的利用率西安工程大学本科毕业设计（译文）5比就地补偿高，因此总需要量较就地补偿要小，是一种经济合理的补偿方式。无功补偿应遵循“全面规划，合理布局，分级补偿，就地平衡;集中补偿与分散补偿相结合，以分散补偿为主；高压补偿与低压补偿相结合，以低压补偿为主；调压与降损相结合，以降损为主”的原则。3．补偿容量的确定在电力网中无功功率的消耗是很大的，大约50%的无功功率消耗在输、变、设备上，50%消