變電站外文翻譯外文文獻英文文獻變電站的綜合概述

PAGE1附錄Ⅲ英文翻譯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變電所是電力系統(tǒng)的一個重要組成部分，由電器設(shè)備及配電網(wǎng)絡(luò)按一定的接線方式所構(gòu)成，他從電力系統(tǒng)取得電能，通過其變換、分配、輸送與保護等功能，然后將電能安全、可靠、經(jīng)濟的輸送到每一個用電設(shè)備的轉(zhuǎn)設(shè)場所。作為電能傳輸與控制的樞紐，變電站必須改變傳統(tǒng)的設(shè)計和控制模式，才能適應(yīng)現(xiàn)代電力系統(tǒng)、現(xiàn)代化工業(yè)生產(chǎn)和社會生活的發(fā)展趨勢。隨著計算機技術(shù)、現(xiàn)代通訊和網(wǎng)絡(luò)技術(shù)的發(fā)展，為目前變電站的監(jiān)視、控制、保護和計量裝置及系統(tǒng)分隔的狀態(tài)提供了優(yōu)化組合和系統(tǒng)集成的技術(shù)基礎(chǔ)。該地區(qū)變電所所涉及方面多，考慮問題多，分析變電所擔(dān)負的任務(wù)及用戶負荷等情況，選擇所址，利用用戶數(shù)據(jù)進行負荷計算，確定用戶無功功率補償裝置。同時進行各種變壓器的選擇，從而確定變電站的接線方式，再進行短路電流計算，選擇送配電網(wǎng)絡(luò)及導(dǎo)線，進行短路電流計算。選擇變電站高低壓電氣設(shè)備，為變電站平面及剖面圖提供依據(jù)。本變電所的初步設(shè)計包括了：（1）總體方案的確定（2）負荷分析（3）短路電流的計算（4）高低壓配電系統(tǒng)設(shè)計與系統(tǒng)接線方案選擇（5）繼電保護的選擇與整定（6）防雷與接地保護等內(nèi)容。隨著電力技術(shù)高新化、復(fù)雜化的迅速發(fā)展，電力系統(tǒng)在從發(fā)電到供電的所有領(lǐng)域中，通過新技術(shù)的使用，都在不斷的發(fā)生變化。變電所作為電力系統(tǒng)中一個關(guān)鍵的環(huán)節(jié)也同樣在新技術(shù)領(lǐng)域得到了充分的發(fā)展。本次設(shè)計任務(wù)旨在體現(xiàn)對本專業(yè)各科知識的掌握程度，同時檢驗本專業(yè)的學(xué)習(xí)結(jié)果。首先根據(jù)任務(wù)書上所給系統(tǒng)與線路及所有負荷的參數(shù)，分析負荷發(fā)展趨勢。從負荷增長方面闡明了建站的必要性，然后通過對擬建變電站的