架空线,overhead line
1)overhead line架空线
1.Mechanical computation foroverhead lines by programming in Visual Basic;用VB语言编程实现架空线的力学计算
2.The automatism account and prediction analysis on the regulation ofoverhead line s relaxation degree by the Excel;运用Excel实现架空线弛度调整的自动计算和预测分析
3.Numerical simulations for formation mechanism of mixed-phase ice onoverhead lines;架空线混合凇形成机理的数值解析
英文短句/例句
1.overhead and underground system架空线和地下线系统
2.Overhead Transmission Line-Open Fault Detection in Urumqi 10kV Distribution Network;乌鲁木齐10kV配电网架空线路断线检测
3.Matlab realization of stress-curve or hang-down-arc-curve of overhead line架空线应力弧垂曲线的Matlab实现
4.The device used for sending the waves off into space is known as aerial or antenna.用来把电波送入太空的装置称为架空线或天线。
5.The trolley bus picks up current from an overhead wire.无轨电车的电能是通过架空线供给的.
6.The trolley bus pick up current from an overhead wire无轨电车的电能是通过架空线供给的
7.Underground transmission is more expensive than the overhead alternative.地下输电要比架空线输电成本高
8.Sag and Tension Calculation of Overhead Transmission Line by Finite Element Method用有限元法计算架空线的弧垂和张力
9.RESEARCH AND DEVELOPMENT OF FAULT IN DISTRIBUTE TRANSMIT LINE;配电网架空线路故障隔离装置的研制
10.Two-dimensional Benchmarking Study of 110kV Overhead Transmission Lines110kV架空线路二维对标的研究
putation and Analysis of Lightning-Induced Overvoltages in Overhead Lines架空线路雷电感应过电压估算与分析
12.Hard-drawn aluminium wire for overhead line conductorsGB/T17048-1997架空绞线用硬铝线
13.Analysis of Ampere Force in Three-phase Conducting Wires of Overhead Transmission Line架空输电线路三相导线间安培力分析
14.Reason Analysis and Countermeasures of Overhead Insulation Grounding Line Drop Accident of 500kV Transmission Line.500kV输电线路架空绝缘地线掉线原因分析及对策
15.Study of the Safety Evaluation Method for Passenger Ropeway Supporting Stand;客运架空索道线路支架安全评价方法研究
16.Pin-type insulators of ceramic material for overhead telegraph linesGB/T774-1993架空通信线路针式瓷绝缘子
17.line-end station(缆索铁路和架空索道的)线路尽头站
18.The cable is designed for aerial electricity transmission and distribution line.本产品适用于架空电力输配电线路。
相关短句/例句
overhead line架空线路
1.Strategy-making method ofoverhead line control and undergroundcable retrofitting based on clustering algorithm;基于聚类算法的架空线路入地改造控制决策方法
2.Utilizing computer to protract installation curve ofoverhead line;利用微机绘制架空线路安装曲线
3.With consideration of the shortage that the tradition discriminant method ofoverhead lines of rural power grid is complex and hard to programme, a discriminant algorithm of control climate condition of rural power grid based on iterative technology is introduced.针对农村电网架空线路控制气象条件的传统判断算法繁琐,不适合计算机处理的问题,提出了基于迭代技术的农村电网架空线路控制气象条件的判定算法。
3)overhead ground wire架空地线
1.Based on the analysis of a 500 kVoverhead ground wire broken and falling down accident,this paper finds the basic cause and proposes the corresponding preventives and treatment.通过对一起500 kV架空地线断裂落地的事故进行原因分析,找出了架空地线断落的根本原因,并提出了相应的防治措施和建议。
2.Working frequency current division factor ofoverhead ground wire is an important parameter directly related to equipment and personnel safety and project investments.架空地线工频分流系数是进行接地设计、计算的重要参数,它直接关系到设备、人身安全和工程投资,因而应尽可能准确确定。
4)overhead conductor架空导线
1.Manufacture of theoverhead conductors for 500 kV transmission line;500kV输电线路用架空导线的制造
2.The paper analyzed the reason of twisting foroverhead conductor and the relations between conductor wave and rigidity, put forward the test method of twisting moment based on the needs of project and investigation of foreign condition, and discussed the R&D of the special equipment for twisting moment test, still put forward the specific me.文章分析了架空导线产生扭转的原因以及导线舞动与扭转刚度之间的关系,在对工程需要及国外情况进行调研的基础上提出了扭力矩试验方法,并对扭力矩试验的专用设备的研制进行了探讨和实践,还提出了扭力矩试验参数应用于分裂导线扭转失稳控制的具体方法。
3.The galloping tester developed by Shanghai Eectric Cable Research Institute can imitate well the real galloping tracks of the installedoverhead conductors in.论述了架空导线舞动的情况、成因、原理,以及防治措施;介绍了标准规定的导线舞动试验项目,分析了舞动试验装置的原理及用途,解决了目前舞动试验只有标准,没有方法和试验设备的尴尬处境。
5)overhead transmission line架空导线
1.This paper started with the composing and calculation ofoverhead transmission line the annualized fees, then the wire economical current density formulaJ_∞was derived.从架空线路年计算费用的构成和计算入手,导出了导线经济电流密度J_∞的计算式,提出了导线价格α和电能单价β两个动态参数是影响架空导绒经济电流密度的两大主要因素,并分析了三者间的相关关系;阐明了原国家颁布的经济电流密度在现阶段使用的不合理性,给出了现阶段经济电流密度推荐值及方便实用的J_β=f(α/β)曲线,为动态模式下架空导线经济电流密度的取值提供了方法和依据。
6)overhead transmission line架空线路
1.Calculation of lightning withstand level for energy-useroverhead transmission line and improving measures;用户架空线路耐雷水平的计算与改善措施
2.The formation and classification of lightening overrating voltage and the ways for regular and irregular lightening-proof of theoverhead transmission line are introduced.结合本单位农村电网送配电架空线路防雷措施设置现状,对加强农网输配电架空线路防雷措施进行探讨,并提出了相应的措施。
3.The control condition of carrying capability ofoverhead transmission line is introduced, and a deep analysis is given on operation terms of transmission lines and weather parameters survey in decades in Guangdong, and allowable current I0 on transmission line under normal operation for Guangdong Power Grid is established.阐述架空导线载流控制条件,分析广东架空送电线路实际运行条件和广东地区多年实测气象参数,制定广东架空线路正常运行允许电流I0,通过风险分析证实现有线路正常载流能力可安全地提高7%以上。
延伸阅读
架空线微风振动架空线微风振动aeolian vibration of overhead line之不能出现卡门气流旋涡。风速上限值随导线悬挂点离地面高度的增加而提高,通常达到8~10m/s。风向是振动持续稳定的必摇条件,当风向与导线轴线之间的夹角在450以上时.导线振动是稳定的,当此夹角在300~45’时,振动的稳定性很小,而当此夹角小于200时,一般不会发生振动.(3)档距长度。徽风振动以一个档距为独立的振动单元.档距愈大,由于档距长度等于半波长的整数倍的振动绷率值愈密集,故建立稚定振动的机率愈大,即振动持续时间增加。另一方面,风传输给导线的振动能t与档距长度成正比,这给大档距的防振设计带来很大困难。对于档距长度为10Om以下的小档距,不仅出现振动的机率很小,同时档距端部的阻尼作用对振动有很大的影响,故小档距一般不藉装设消振装盆.(4)导线张力.为了说明导线张力对振动的影响,引入了导线平均运行应力(通常用EDS表示)的概念,它是指年平均气沮及无外荷载条件下的导线水平应力,习惯上将此时导线张力值用导线极限强度(通常用UTS表示)的百分数来表示。提高导线张力会使导线本身的阻尼作用减小,并且导线的允许疲劳强度也随张力的提高而降低。因而提高导线张力增加了振动的危险性.国际大电网会议(CIGRE)根据各国提供的线路运行经脸进行总结,规定了一般情况下导线张力的上限值为25%UTS,这与中国根据线路的运行经验褥到的结论相同.另一方面,限制提高导线的张力必然会增加线路的建设投资。若将规定的EDS上限值作为一个绝对标准,而不考虑导线构造设计的差别,也会导致严重的振动后果,是不经济的。因此,正确地估价导线张力的影响,应从导线的阻尼作用来分析,例如结构设计相同而采用高强度材料制造的导线,应取用较低的EDS值,如果改变导线的结构设计而提高了阻尼作用,则可能取用较高的EDS值。自阻尼导线就是一种特殊结构设计的导线,其EDs值可提高到35%UTs左右,从而明显地降低了线路的造价,并解决了大跨越线档严重的徽风振动问题。(5)惫垂线夹。虽然悬垂线夹对振动强度并无影响,但振动现象却是通过悬垂线夹转变为动态应力作用于导线的。实际运行经验说明,由于悬垂线夹的型式、性能及质t等方面的差异,或者由于安装使用不当,都会造成疲劳断股情况的极大差别。20世纪50年代曾一度认为悬垂线夹是防止导线疲劳断股的关键,企图设计一种“防振线夹”。基于这种观点研制成功了预纹丝型悬垂线夹,可以达到比较满愈的运行效果。现在对惫垂线夹的设计原则已充分考虑了徽风振动的特点,使各种常规的悬垂线夹已具有满意的防振性能。