电气毕业设计外文翻译

《电气毕业设计外文翻译》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

1、山东建筑大学毕业设计外文文献及翻译本科毕业设计外文文献及译文文献、资料题目：《SpecialEnglishforArchitecturalElectricEngineeringandAutomation》文献、资料来源：期刊（著作、网络等）文献、资料发表（出版）日期：2006.4院（部）：信息与电气工程学院学院专业：电气工程与自动化班级：电气093姓名：孙德艺学号：2009081102指导教师：陈红艳翻译日期：2013.6.30山东建筑大学毕业设计外文文献及翻译外文文献一：TransformerOneofthemostvaluableappar

2、atusinelectricpowersystemisthetransformer,foritenablesustoutilizedifferentvoltagelevelsacrossthesystemforthemosteconomicalvalue.Generationofpoweratthesynchronousmachinelevelisnormallyatarelativelylowvoltage，whichismostdesirableeconomically．Steppingupofthisgeneratedvoltagetoh

3、ighvoltage，extra-highvoltageoreventoultra-highvoltageisdonethroughpowertransformerstosuitthepowertransmissionrequirementtominimizelossesandincreasethetransmissioncapacityofthelines．Thistransmissionvoltagelevelisthensteppeddowninmanystagesfordistributionandutilizationpurposes

4、．Atransformerisastaticdevicefortransferringelectricenergyfromonecircuittoanotherelectromagnetically，thatis，byinductioninsteadofbyconduction．Itsusualfunctionistotransferenergybetweencircuitsofdifferentvoltage．Atransformerhasamagneticcoreonwhichtherearetwoormorewindings．Thesew

5、indingsareinsulatedfromeachotherandfromground．Inautotransformers，however，thewindingsareconnectedtogether．Theassemblyofcoreandcoilsisnormallyinsulatedandcooledbyimmersioninmineraloilorothersuitableliquidwithinanenclosingtank．Connectiontothewindingsisbymeansofinsulatingbushing

6、s，usuallythroughthecover.The“ratiooftransformation”isdeterminedbytherelativenumberofturnsineachofhewindings．Thisisknownasthe“turnratio”anditistheratiooftheno-loadvoltages．Whentheunitiscarryingload,theratiooftheactualvoltagesisslightlydifferentbecauseofthedropcausedbytheflowo

7、f1oadcurrentthroughtheimpedanceofthetransformerwindings．Atratedload,thisdropisknownasthe"voltageregulation".Theamountofvoltagedropvarieswiththepowerfactoroftheoutputevenwhenthekilovolt-amperesremainconstant．Practicallyallpowertransformersandmanydistributiontransformershaveta

8、psinoneormorewindingsforchangingtheturnratio．Changingtheratioisdesirable山东建