资源描述：
《外文翻译--变电站与电力系统继电保护》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。
1、中文3826字附录1：外文资料翻译A1.1SubstationandPowerSystemProtectionWiththedevelopmentofundertakingoftheelectricwirenetting,thepatternofnationalnetworkhasalreadytakenshapebasically.Scientificandtechnologicallevelraise,electricenvironmentalprotectioncanstrengthen,makescientificandtechnologicalco
2、mpetenceandadvancedinternationalstandards,Chineseofpowerindustryclosedaybyday.Electricmanagementlevelandservicelevelarebeingimprovedconstantly,strategicplanningmanagementofelectricpowerdevelopment,productionoperatemanage,electricmarketadministrationandelectricinformationmanagementl
3、evel,high-qualityservicelevel,etc.generaltoraiseenterprise.Thepurposeofasubstationistotransformthecharacteristicsoftheelectricalenergysuppliedtosomeformsuitableforuse,asforexample,aconversionfromalternationcurrenttodirectcurrentfortheuseofcityrailwayservice,orachangefromonevoltaget
4、oanother,oronefrequencytoanother.Theirfunctionsinclude:Tap.─TObeeconomical,transmissionoflargeramountsofpoweroverlongdistancesmustbedoneatvoltagesabove110,000volts.Substationsforsupplyingsmallamountsofpowerfromsuchhigh-voltagelinesarenotsatisfactoryfromthestandpointofoperationandar
5、ealsouneconomical.Itis,therefore,commonpracticetoinstallafewsubstationsatadvantageouspointsalongthehigh-tensionlinesandstepdownthehigh-transmissionvoltagetoalowersecondary-transmissionvoltagefromwhichnumeroussmallloadsmaybesupplied.Distribution.─Anysubstationthatisusedtotransformel
6、ectricalenergytoapotentialthatislowenoughforgeneraldistributionandutilizationisadistributingsubstation.Suchasubstationwillgenerallyreceiveitsenergyoverafewcomparativelyhigh-tensionlinesanddistributeitoveralargenumberoflow-voltagelines.Industrial.─Whenfairlylargeblocksofpowerarerequ
7、iredbyindustrialplants,itoftenbecomesnecessaryandadvisabletoinstallanindividualsubstationtosupplysuchaloaddirectlyfromthemainhigh-voltagelineorsecondarylineoflowervoltage.Itssimplestformwouldcompriseonlyswitchingequipment,therebeingnovoltagetransformation.Inmostcasesavoltagetransfo
8、rmationisprobablyneeded;he
