光纤复合架空地线断股情况调查分析

Investigation and Analysis of Broken Strand Condition for OPGW

文章针对光纤复合架空地线(OPGW)的断股现状,调查分析了OPGW的断股情况,并对断股的原因和特征进行了分析,对断股的机理进行了研究,并通过雷击试验,验证了分析结论。调查分析和雷击试验均表明:选线断股的原因是雷击;外层绞线为铝合金或单丝直径较小的易于断股;高幅值雷电流和低幅值雷电流均能造成断股。

According to the present situation of broken strand for OPGW, the condition of broken strand was investigated and analyzed, and the reasons and features for broken strand were analyzed. The mechanism of broken strand was studied, lightning stroke tests were carried out, and the conclusion of analysis was verified. The investigation analysis and the lightning stroke tests show that the reasons for broken strand are caused by lightning stroke; OPGW of outer stranded wire with less diameter of aluminium alloy or single line is easy to be broken strand; the broken strand can be caused by both high and low amplitude lightning currents.