OPGW覆冰断线原因分析

Reason Analysis of OPGW Breakage Caused by Ice Cover

对OPGW覆冰断线原因进行了分析,认为覆冰断线原因是OPGW覆冰致使其弧垂加大,使其与导线处于同一高度或低于导线高度,这样在风的激励下诱发覆冰OPGW舞动,导致导线对OPGW放电产生高温电弧,将外层部分铝合金绞线熔断,使其余绞线不足以承受OPGW的张力,最终导致OPGW断线。

This paper analyzed the cause of OPGW breakage caused by ice cover,it considers the main cause of breakage is that the ice cover on OPGW results in the increasing of sag,the sagged OPGW reached to the height of conductors or lower than their height, and also OPGW icing gallops under wind, the hightemperature electric arc produced by the discharge of conductors to OPGW fuses a part of the outer aluminium alloy stranded wires ,and remainders are not capable to endure tension of OPGW,which results in breaking OPGW at last.