CAJ | 학술논문

输电线路覆冰是极为严重的自然灾害之一。严重的导线覆冰会引起线路过荷载、导线舞动、大面积的覆冰倒塔等灾难性的事故。目前国内外多采用大电流融冰方法除去导线上的覆冰，由于导线的电感对直流不起作用，直流融冰技术得到了大规模的应用。受人工气候尺寸的限制，在实验室很难模拟覆冰导线真实的融冰和脱冰环境，目前大多数研究都是采用数值仿真和在导线上添加重物模拟覆冰的方法。作者在自然覆冰实验站开展了直流融冰试验，记录并观测了导线脱冰的过程。研究表明：根据钢芯铝绞线的有效截面积并按2 A/mm2选取的直流融冰电流，可以有效去除导线上的覆冰；覆冰导线的脱冰时间具有一定的分散性，覆冰导线脱冰跳跃有可能引起导线的较大位移。
수전선로복빙시겁위엄중적자연재해지일。엄중적도선복빙회인기선로과하재、도선무동、대면적적복빙도탑등재난성적사고。목전국내외다채용대전류융빙방법제거도선상적복빙，유우도선적전감대직류불기작용，직류융빙기술득도료대규모적응용。수인공기후척촌적한제，재실험실흔난모의복빙도선진실적융빙화탈빙배경，목전대다수연구도시채용수치방진화재도선상첨가중물모의복빙적방법。작자재자연복빙실험참개전료직류융빙시험，기록병관측료도선탈빙적과정。연구표명：근거강심려교선적유효절면적병안2 A/mm2선취적직류융빙전류，가이유효거제도선상적복빙；복빙도선적탈빙시간구유일정적분산성，복빙도선탈빙도약유가능인기도선적교대위이。
Ice coating on transmission line is one of most serious natural disasters. Severe ice coating on conductors may cause catastrophic accidents such as overload of transmission lines, conductor galloping, toppling and falling of transmission towers in large-area. At present the ice melting by high current is widely applied home and abroad, and in view of the fact that direct current is not relevant to conductor inductance, the DC ice melting technology is applied in large-scale. Restricted by the size of artificial climate chamber, it is hard to simulate real environment for ice melting and ice shedding in artificial climate chamber, so numerical simulation and hanging heavy thing on conductor are widely used methods to simulate ice coating on conductor in most of present researches. The DC melting experiments are carried out in natural icing experimental station, and the ice shedding process is recorded and observed. Research results show that the DC ice melting current, which is chosen according to the current density of 2A/mm2 for effective sectional area of aluminium conductor steel reinforced (ACSR), can de-icing the ice coating on conductors;there is a certain dispersity in the ice shedding time of conductor, and the conductor jumping caused by ice shedding may cause evident displacement of conductors.