一种电力架空线垂度的简算方法

摘要

A trolly wire with insulators in electric transmissions is investigated in this paper. Based on longitudinal-transversal bending theory, the deflection curve equations of aluminum cable steel reinforced is derived. The sag and the horizontal tension of the trolly wire are obtained based on a insulator's simplified model under dead weight and temperature loads. The results show that the method in this paper is simple and effective. The main influencing factors of the sags are temperature and span of trolly wire. The average variation rate of the sag to temperature is 2.55 mm/℃; the sag will be almost increased by 60％ when the span of trolly wire decreases 1％.%以输配电工程中带有绝缘子的电力架空线为研究对象,简化绝缘子的力学模型,采用纵横弯曲理论推导了钢芯铝铰线的挠度方程,计算了在自重和温度载荷共同作用下的架空线垂度和水平张力.计算结果表明,文中算法简单有效,架空线跨距和温度等是架空线垂度的主要影响因素.架空线垂度对温度的平均变率为2.55 mm/℃;当跨距减小1%时,垂度增加近60%.