交流輸電(dian)線(xian)(xian)(xian)(xian)(xian)路的(de)電(dian)暈損失主要(yao)與導(dao)(dao)(dao)線(xian)(xian)(xian)(xian)(xian)表(biao)(biao)面場 強(qiang)(qiang)和(he)天氣(qi)有(you)(you)關，根(gen)據絕(jue)緣水平要(yao)求(qiu)確定了(le)相(xiang)間距離后(hou)(hou)，導(dao)(dao)(dao)線(xian)(xian)(xian)(xian)(xian)表(biao)(biao)面場強(qiang)(qiang)主要(yao)與導(dao)(dao)(dao)線(xian)(xian)(xian)(xian)(xian)分裂(lie)數(shu)、分裂(lie)間距和(he)子導(dao)(dao)(dao)線(xian)(xian)(xian)(xian)(xian)直徑(jing)(jing)(jing)(jing)有(you)(you)關，分裂(lie)數(shu)越(yue)多，子導(dao)(dao)(dao)線(xian)(xian)(xian)(xian)(xian)直徑(jing)(jing)(jing)(jing)越(yue)大，表(biao)(biao)面場強(qiang)(qiang)越(yue)小。擴(kuo)(kuo)徑(jing)(jing)(jing)(jing)導(dao)(dao)(dao)線(xian)(xian)(xian)(xian)(xian)通(tong)過支撐鋁線(xian)(xian)(xian)(xian)(xian)疏繞的(de)方(fang)式擴(kuo)(kuo)大了(le)導(dao)(dao)(dao)線(xian)(xian)(xian)(xian)(xian)外徑(jing)(jing)(jing)(jing)，這樣可減小導(dao)(dao)(dao)線(xian)(xian)(xian)(xian)(xian)表(biao)(biao)面的(de)電(dian)場強(qiang)(qiang)度和(he)電(dian)暈放電(dian)，降(jiang)低噪聲，減少對(dui)無線(xian)(xian)(xian)(xian)(xian)電(dian)的(de)干擾。相(xiang)對(dui)于(yu)常規導(dao)(dao)(dao)線(xian)(xian)(xian)(xian)(xian)，擴(kuo)(kuo)徑(jing)(jing)(jing)(jing)導(dao)(dao)(dao)線(xian)(xian)(xian)(xian)(xian)重量較輕，安裝敷設后(hou)(hou)的(de)塑蠕伸(shen)長減小，導(dao)(dao)(dao)線(xian)(xian)(xian)(xian)(xian)永久變形減少，在滿(man)足(zu)輸送(song)容(rong)量要(yao)求(qiu)和(he)環(huan)境保護指標的(de)前提(ti)下，可大幅降(jiang)低線(xian)(xian)(xian)(xian)(xian)路整體造價。簡(jian)單(dan)說來，擴(kuo)(kuo)徑(jing)(jing)(jing)(jing)導(dao)(dao)(dao)線(xian)(xian)(xian)(xian)(xian)是從常規導(dao)(dao)(dao)線(xian)(xian)(xian)(xian)(xian)中抽取數(shu)股鋁線(xian)(xian)(xian)(xian)(xian)后(hou)(hou)繞制而成(cheng)的(de)。

    分(fen)(fen)裂導(dao)(dao)線(xian)(xian)(xian)是(shi)由(you)三根(gen)(gen)或四根(gen)(gen)單芯(xin)導(dao)(dao)線(xian)(xian)(xian)經過某種(zhong)工(gong)藝(yi)制造在(zai)一(yi)起的一(yi)種(zhong)可分(fen)(fen)裂的導(dao)(dao)線(xian)(xian)(xian)，或者稱(cheng)導(dao)(dao)線(xian)(xian)(xian)束， 這(zhe)種(zhong)分(fen)(fen)裂導(dao)(dao)線(xian)(xian)(xian)不僅僅是(shi)形式上與(yu)常規導(dao)(dao)線(xian)(xian)(xian)不同(tong)，由(you)于分(fen)(fen)裂導(dao)(dao)線(xian)(xian)(xian)可使(shi)導(dao)(dao)線(xian)(xian)(xian)周(zhou)圍磁場(chang)分(fen)(fen)布改(gai)變(bian)，從而等效地增大(da)了(le)導(dao)(dao)線(xian)(xian)(xian)半徑，減小了(le)導(dao)(dao)線(xian)(xian)(xian)電抗；同(tong)時也(ye)改(gai)變(bian)了(le)導(dao)(dao)線(xian)(xian)(xian)周(zhou)圍的電場(chang)分(fen)(fen)布， 使(shi)導(dao)(dao)線(xian)(xian)(xian)的電納也(ye)相應增大(da)。