突然断线对输电塔线体系的冲击作用研究

PDF(2042 KB)

振动与冲击 ›› 2009, Vol. 28 ›› Issue (12) : 4-8.

论文

突然断线对输电塔线体系的冲击作用研究

沈国辉1;默增禄2;孙炳楠1;楼文娟1

作者信息 +

Research of impact effect on transmission line system due to conduct sudden breakage

SHEN Guohui1;MO Zenglu 2;SUN Bingnan1;LOU Wenjuan1

Author information +

文章历史 +

摘要

突然断线使处于绷紧状态的输电线张力迅速释放，塔线体系将受到动力冲击作用，但设计规范仅按静态荷载来考虑断线荷载。以某输电线路为例，采用有限元方法建立塔线体系模型，进行断一根至六根子导线工况的模拟，并考虑跌落导线与地面的碰撞。分析发现，断子导线的根数越多，或者越接近断线点，直线塔绝缘子的摆动幅度越大，峰值轴力也越大。导线断线将产生两个极大的冲击作用，一个是导线断裂产生的冲击，另一个是跌落导线与地面碰撞产生的冲击。

Abstract

The sudden breakages of conduct enable the quick release of tension on conducts, which cause the dynamic impact effect on transmission line system. But the design Codes of transmission towers only consider conduct breakage load as static load. Taking a transmission line system as example, Finite Element Method is employed to construct the tower-line model. The calculating cases from one sub-conduct breakage to six sub-conduct breakages are simulated and the impinging between dropping conduct and ground is also considered. Conclusions show that, if the number of breaking sub-conduct is bigger or it is much closer to the breaking point, both the swing amplitudes and the peak axis forces on insulators of tangent towers will be larger. The breakage of conducts will result in two major impacts, one is induced by the sudden breakage of conduct, the other is induced by impinging between the dropping conduct and the ground.

导出引用

沈国辉;默增禄;孙炳楠;楼文娟. 突然断线对输电塔线体系的冲击作用研究[J]. 振动与冲击, 2009, 28(12): 4-8

SHEN Guohui;MO Zenglu;SUN Bingnan;LOU Wenjuan. Research of impact effect on transmission line system due to conduct sudden breakage [J]. Journal of Vibration and Shock, 2009, 28(12): 4-8