变电站外文翻译外文文献英文文献变电站的综合概述

PAGE1附录Ⅲ英文翻译AcomprehensiveoverviewofsubstationsAlongwiththeeconomicdevelopmentandthemodernindustrydevelopmentsofquickrising,thedesignofthepowersupplysystembecomemoreandmorecompletelyandsystem.Becausethequicklyincreaseelectricityoffactories,italsoincreasesseriouslytothedependableindexoftheeconomiccondition,powersupplyinquantity.Thereforetheyneedthehigherandmoreperfectrequesttothepowersupply.WhetherDesignreasonable,notonlyaffectdirectlythebaseinvestmentandcirculatetheexpenseswithhavethemetaldepletionincolourmetal,butalsowillreflectthedependableinpowersupplyandthesafeinmanyfacts.Inaword,itisclosewiththeeconomicperformanceandthesafetyofthepeople.Thesubstationisanimportancepartoftheelectricpowersystem,itisconsistedoftheelectricappliancesequipmentsandtheTransmissionandtheDistribution.Itobtainstheelectricpowerfromtheelectricpowersystem,throughitsfunctionoftransformationandassign,transportandsafety.Thentransportthepowertoeveryplacewithsafe,dependable,andeconomical.Asanimportantpartofpower’stransportandcontrol,thetransformersubstationmustchangethemodeofthetraditionaldesignandcontrol,thencanadapttothemodernelectricpowersystem,thedevelopmentofmodernindustryandtheoftrendofthesocietylife.Electricpowerindustryisoneofthefoundationsofnationalindustryandnationaleconomicdevelopmenttoindustry,itisacoal,oil,naturalgas,hydropower,nuclearpower,windpowerandotherenergyconversionintoelectricalenergyofthesecondaryenergyindustry,itfortheotherdepartmentsofthenationaleconomyfastandstabledevelopmentoftheprovisionofadequatepower,anditslevelofdevelopmentisareflectionofthecountry'seconomicdevelopmentanimportantindicatorofthelevel.Asthepowerintheindustryandtheimportanceofthenationaleconomy,electricitytransmissionanddistributionofelectricenergyusedintheseareasisanindispensablecomponent.。Therefore,powertransmissionanddistributioniscritical.Substationistoenablesuperiorpowerplantpowerplantsorpowerafteradjustmentstothelowerloadofbooksisanimportantpartofpowertransmission.Operationofitsfunctions,thecapacityofadirectimpactonthesizeofthelowerloadpower,therebyaffectingtheindustrialproductionandpowerconsumption.Substationsystemifalinkfailure,thesystemwillprotectthepartofaction.Mayresultinpoweroutagesandsoon,totheproductionandlivingagreatdisadvantage.Therefore,thesubstationintheelectricpowersystemfortheprotectionofelectricityreliability,sensitivityandotherindicators.Powerplantsandsubstationsareconnecteduserlinkinthemiddle,transformationanddistributionofelectricenergytoplaytherole.Accordingtothedifferenttaskssubstationcanbedividedintostep-uptransformerstep-downtransformersubstationandtwobroadcategories.Step-upsubstationbuiltonthegeneralpowerplant,thegeneralstep-downtransformerneartheloadcenterbuiltonthelow.Voltagecanalsobedividedaccordingtomediumvoltagesubstation(60kVandbelow),high-voltagesubstations(110~220kV),EHVSubstation(330~765kV)andUltraHighVoltageSubstation(1000kVandabove).Inelectricpowersystemaccordingtotheirstatusasahubsubstationcanbedividedintothemiddlesubstationsubstationsandterminals.Thisrequiresasubstationpartofeconomicrationality,thesecondpartofsafeandreliable,theonlywaytothenormaloperationofsubstationworkservicesforthenationaleconomy.Therearestep-uptransformerstep-downtransformersubstationandtwobroadcategories.Substationshavebeenequippedwithvariousprotectiondevices,thesedevicesarebasedonlowershort-circuitloadtoamaximumloadconditions,suchasconfigurationsettingsand,therefore,intheeventofthefailurewassimilartothespecificcircumstancesundertojudgebythesystemshouldautomaticallytripprotection,andnowtheprotectionofthewholetriphasbeenaveryshorttime,theliftingofthefault,thesystemwillautomaticallyreclosingdevicesandthegatewaytorestorepowerquickly.Thisistoprotectthelowertheloadisveryfavorable.Thiswillnotonlyprotectthesafetyoftheloadequipmentisinfavorofextendingtheservicelifeandreduceequipmentinvestment,andimprovedreliabilityofelectricitysupply,whichistoimprovetheefficiencyofindustrialandagriculturalproductionisveryeffective.Substationshavebeenequippedwithvariousprotectiondevices,thesedevicesarebasedonlowershort-circuitloadtoamaximumloadconditions,suchasconfigurationsettingsand,therefore,intheeventofthefailurewassimilartothespecificcircumstancesundertojudgebythesystemshouldautomaticallytripprotection,andnowtheprotectionofthewholetriphasbeenaveryshorttime,theliftingofthefault,thesystemwillautomaticallyreclosingdevicesandthegatewaytorestorepowerquickly.Thisistoprotectthelowertheloadisveryfavorable.Thiswillnotonlyprotectthesafetyoftheloadequipmentisinfavorofextendingtheservicelifeandreduceequipmentinvestment,andimprovedreliability变电所是电力系统的一个重要组成部分，由电器设备及配电网络按一定的接线方式所构成，他从电力系统取得电能，通过其变换、分配、输送与保护等功能，然后将电能安全、可靠、经济的输送到每一个用电设备的转设场所。作为电能传输与控制的枢纽，变电站必须改变传统的设计和控制模式，才能适应现代电力系统、现代化工业生产和社会生活的发展趋势。随着计算机技术、现代通讯和网络技术的发展，为目前变电站的监视、控制、保护和计量装置及系统分隔的状态提供了优化组合和系统集成的技术基础。该地区变电所所涉及方面多，考虑问题多，分析变电所担负的任务及用户负荷等情况，选择所址，利用用户数据进行负荷计算，确定用户无功功率补偿装置。同时进行各种变压器的选择，从而确定变电站的接线方式，再进行短路电流计算，选择送配电网络及导线，进行短路电流计算。选择变电站高低压电气设备，为变电站平面及剖面图提供依据。本变电所的初步设计包括了：（1）总体方案的确定（2）负荷分析（3）短路电流的计算（4）高低压配电系统设计与系统接线方案选择（5）继电保护的选择与整定（6）防雷与接地保护等内容。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。本次设计任务旨在体现对本专业各科知识的掌握程度，同时检验本专业的学习结果。首先根据任务书上所给系统与线路及所有负荷的参数，分析负荷发展趋势。从负荷增长方面阐明了建站的必要性，然后通过对拟建变电站的