用于重冰区架空输电线路的钢芯铝合金绞线机械特性分析

为提高重冰区架空输电线路的安全可靠性,需合理选择重冰区架空输电线路的导线型号。为此,计算了钢芯铝合金绞线和普通钢芯铝绞线在相同的悬挂条件下,最大覆冰时导线悬挂点的安全系数,计算、比较了2种导线舞动时的动态应力、安全系数及最大覆冰时的最大弧垂。结果表明:钢芯铝合金绞线应用于重冰区输电线路时,能表现出更优秀的机械特性和弧垂特性,且导线的最大设计覆冰厚度越大,其优势越明显。另外,得益于其良好的弧垂特性,钢芯铝合金绞线可降低线路铁塔的高度,节省钢材。

Mechanical Characteristic Analysis of Aluminium-alloy Conductor Steel-reinforced Applying in Transmission Line in Heavy Icing Area

In order to enhance the safe reliability of transmission line in heavy icing area,the type of conductor should be selected reasonably.Thus,in the same hanging condition,the safety coefficients of hanging point of aluminum-alloy conductor steel-reinforced and steel-cored aluminum strand wire were calculated within the largest icing.Dynamic stress,safety coefficients and maximum sag under largest icing condition of two types of wires were also calculated and compared.The results show that aluminum-alloy conductor steel-reinforced wire used for heavy icing transmission line possesses better mechanical properties and sag characteristics.Moreover,the thicker the maximum ice coating of wire is designed,the more obvious its advantage shows.Otherwise,the steel can be retrenched profit from the sag characteristics of aluminum alloy conductor steel reinforced wire.