1) bundle large sectional conductor
四分裂大截面导线
1.
Taking the construction of 2 500 kV transmission lines as an example the paper demonstrates the characters of construction for 4-bundle large sectional conductor under tension stringing and its key construction process.
以龙政和左龙 5 0 0kV输电线路施工为例 ,论述了四分裂大截面导线张力架线施工的特点及其关键施工工艺 ,并对同时、先后一牵二双挂点和单挂点不同施工工艺方法进行了综合分析比较 ,直线塔采用双滑车、单挂点、同时一牵二方式放线 ,不但放线速度快 ,易于弛度观测、调整 ,而且附件安装工艺简单 ,施工效率
2) double split large cross-section line
双分裂大截面导线
3) large cross-section conductor
大截面导线
1.
Techno-economic analysis of large cross-section conductor for 110 kV power grid reforming in Chongqing;
大截面导线在重庆110kV电网改造应用的技术经济分析
2.
1 section of the Three Gorges to Guangdong ±500 kV DC transmission line,compression splice and tension stringing of ACSR-720/90 large cross-section conductor is first attempted.
±500kV三峡至广东直流输电线路工程广1标段,地形条件恶劣,气象条件复杂,首次尝试采用集中压接张力展放ACSR-720/90大截面导线施工工艺。
3.
The application of large cross-section conductorcan effectively reduce the current density and realize thestrategy of energy saving & consumption reduction.
应用大截面导线是降低电流密度、节能降耗的有效手段。
4) Four Sub-conductors a Wire
四分裂导线
5) large size overhead conductor
大截面架空导线
1.
With the growth of the demand for electric power in China,power transmission capacity is increasing continuously,resulting in ever wider application of the technology for large size overhead conductors.
随着我国电力需求的增长,输电容量日益增大,大截面架空导线输电技术的应用将日益广泛。
6) conductor section
导线截面
1.
In DC transmission line construction design,current national standard of economical current density will under predictcd conductor section,resulting in large loss.
在直流输电线路工程设计中,如果按我国现行标准规定的经济电流密度选择导线截面,将导致截面偏小,损耗增大。
2.
In this paper,the mechanism and characteristics of conductor skin effect with nonlinear loads were deeply analyzed;the impact of skin effect on conductor section selection were studied;the existing problems of conductor section selection were indicated;the new methods and conclusions of conductor section selection with nonlinear loads were presented.
本文深入分析了非线性条件下导线集肤效应产生的机理及其特性,研究了集肤效应对导线截面选取的影响,指出了目前导线截面选取存在的问题,得出了非线性负载条件下导线截面选取新的方法和结论。
3.
Based on design of the first 750 kV line in high altitude area of China as well the overseas requirements of conductor selection and electromagnetic environment, the laws of effect of conductor section and split mode on the electromagnetic environment, mechanical features and project economy of various conductor used in 750 kV single line are introduced.
结合我国第一条高海拔750kV线路的设计,以及国内外导线选型及电磁环境要求,介绍了导线截面及分裂形式对750kV单回线路各种导线的电磁环境、电气特性、机械特性和工程经济性等方面影响的规律,综合考虑技术性和经济性,推荐了750kV输变电示范工程官亭—兰州东线路工程的导线方案。
补充资料：输电线路导线截面选择
输电线路导线截面选择
selection of conductor cross-section of transmission line
但由于超高压输电线路导线的表面电场强度均控制在电晕临界电场强度的80%以上，接近于电晕临界电场强度，而新架设导线表面的局部污损又导致导线电晕临界电压降低，故运行初期和在雨天情况下仍难免出现电晕。相导线上产生电晕放电时，要伴随着产生连续重复性的电流脉冲，这些电流脉冲产生频率为0.15~100 MHz的振荡电磁波，致使在电晕导线上产生高频电磁辐射，从而在导线周围形成一高频电场，对无线电收音机和发射天线产生干扰。同时这种振荡电磁波还沿导线传播，干扰高频通道的正常工作. 由电晕导线产生的无线电干扰电平L-20 19(EZ/E，)，dB。其中EZ为测点电场强度，拌V/m;E，为参考电场强度，拌V/m。工程上取E，一1拌V/m为基准，故L~20 lgEZ。若EZ~El~1拜V/m，则测点的无线电干扰电平为零。 从高压、超高压架空输电线路下测得的无线电干扰电平L(dB)随频率f(MH:)的增大而减弱，其关系曲线称为频谱特性，如图2所示。由频谱特性看出，频率在0.15~1.0 MH:范围内的干扰电平最大;雨天的干扰电平是各种气候中最大的。另外，随着海拔高度的增大，相对空气密度减小，干扰电平也增大。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条