架空输电线路需扩容时对导线的选择

针对我国"十一五"期间输电线路建设的要求,对非全部新建线路需要扩容时,提出了可选择更换的新型导线以达到线路扩容的目的。对用于主干线路的导线,应着重考虑节能,以及在N-1时的安全运行;对老旧线路改造用导线,应考虑扩容后的弧垂特性。为适应上述要求,文中针对新开发导线性能提出了研制原则,对近年国内外新开发的各种导线性能予以评说。

Selection of Conductors for Increasing the Capacity of Overhead Transmission Lines

In terms of the requirements for the transmission lines during China's Eleventh Five Year Plan,we suggest the substitution of a new type of conductors for the old ones for increasing the capacity of non-newly-built transmission lines.For trunk lines,importance should be attached to energy saving and safe operation in N-1.For the conductors to renovating the old lines,consideration should be given to sag of the renovated line.In order to meet the a.m.requirements,we set up the principle of development for the properties of the conductors to be developed and made assessment on the newly-developed conductors in China and foreign countries in recent years.