超高壓(ya)輸電線(xian)(xian)路(lu)為抑制電暈放電和減少線(xian)(xian)路(lu)電抗所采取(qu)的(de)(de)一種導(dao)(dao)線(xian)(xian)架設方式。即每相導(dao)(dao)線(xian)(xian)由幾根直徑較小(xiao)的(de)(de)分(fen)導(dao)(dao)線(xian)(xian)組成(cheng),各分(fen)導(dao)(dao)線(xian)(xian)間隔一定距離(li)并按(an)對稱(cheng)多角形排列。超高壓(ya)輸電線(xian)(xian)路(lu)的(de)(de)分(fen)裂導(dao)(dao)線(xian)(xian)數(shu)一般取(qu)3~4根。 分(fen)裂導(dao)(dao)線(xian)(xian)...
當線(xian)(xian)路(lu)的電壓超過(guo)220kv時,為(wei)了降低線(xian)(xian)路(lu)電抗(kang)和電暈損耗,通常采用擴徑導(dao)(dao)線(xian)(xian)或分裂(lie)導(dao)(dao)線(xian)(xian),擴徑導(dao)(dao)線(xian)(xian)和分裂(lie)導(dao)(dao)線(xian)(xian)的區(qu)別是:分裂(lie)導(dao)(dao)線(xian)(xian)是將(jiang)每相(xiang)導(dao)(dao)線(xian)(xian)分為(wei)若干根(gen)子(zi)導(dao)(dao)線(xian)(xian),每根(gen)之間(jian)保持一定(ding)距離(一般(ban)為(wei)400mm)這(zhe)樣(yang)可以使導(dao)(dao)線(xian)(xian)的等效半(ban)徑增大,從而檢(jian)點(dian)線(xian)(xian)路(lu)的電抗(kang)...
交流(liu)輸電(dian)線(xian)(xian)路的電(dian)暈損(sun)失主(zhu)要與導(dao)(dao)線(xian)(xian)表面場(chang)強(qiang)和天氣有關,根據絕(jue)緣水(shui)平要求確定(ding)了相間距(ju)(ju)離后(hou),導(dao)(dao)線(xian)(xian)表面場(chang)強(qiang)主(zhu)要與導(dao)(dao)線(xian)(xian)分(fen)裂(lie)數、分(fen)裂(lie)間距(ju)(ju)和子導(dao)(dao)線(xian)(xian)直(zhi)(zhi)徑(jing)有關,分(fen)裂(lie)數越(yue)多,子導(dao)(dao)線(xian)(xian)直(zhi)(zhi)徑(jing)越(yue)大,表面場(chang)強(qiang)越(yue)小。擴徑(jing)導(dao)(dao)線(xian)(xian)通過支撐鋁線(xian)(xian)疏繞的方式(shi)擴大了導(dao)(dao)線(xian)(xian)外徑(jing),這(zhe)樣可減小...
分裂導(dao)(dao)線(xian)是(shi)由三根或四根單芯(xin)導(dao)(dao)線(xian)經過某(mou)種工藝制造在一起的(de)一種可(ke)分裂的(de)導(dao)(dao)線(xian),或者稱導(dao)(dao)線(xian)束,這種分裂導(dao)(dao)線(xian)不僅僅是(shi)形式上與(yu)常規導(dao)(dao)線(xian)不同,由于分裂導(dao)(dao)線(xian)可(ke)使導(dao)(dao)線(xian)周圍磁(ci)場分布改(gai)變,從而(er)等效地增大了導(dao)(dao)線(xian)半徑,減小(xiao)了導(dao)(dao)線(xian)電抗;同...