Fortran-, Python- and Abaqus-Codes for: Mitigation of conductor line galloping by enhanced damping in composite power pylons

Abstract:
Steel lattice towers with suspended insulator strings are typically used to carry high-voltage overhead transmission lines. The installation of non-conductive power pylons made of glass fibre reinforced plastics enables a direct cable-pylon connection, as the composite structure acts as an unibody insulator.
At the same time, wind-induced vibrations, such as the severe cable vibration phenomenon galloping, will consequently be directly transferred to the slender composite mast structure, potentially leading to extensive damage.
The aim of the study is therefore to investigate the galloping behaviour of iced conductor lines with regard to different cable support conditions. Furthermore, additional damping in the composite power pylon structure is assumed to mitigate conductor line galloping and therefore reduce the risk of phase flash-overs between adjacent conductor lines. A numerical galloping simulation is carried out in order to evaluate the effect of a rigid cable-pylon connection with enhanced damping properties on the cable vibration amplitudes. A pylon-cable system, consisting of 3x300m spans, is investigated.
It was found that the support conditions of the conductor lines have a significant influence on the galloping mode, the vibration amplitudes and the orientation of the characteristic galloping ellipse. The addition of damping to the pylon decreases the vibration amplitudes slightly and leads to a re-orientation of the galloping ellipse.

All the data of the numerical FE-simulation are uploaded in order to reproduce the models or apply for different simulations.

摘要：钢制网格塔，配备悬挂式绝缘子串，通常用于承载高压架空输电线路。采用玻璃纤维增强塑料制成的非导电电力塔的安装，使得电缆与电力塔的直接连接成为可能，因为复合材料结构充当整体绝缘体。与此同时，由风引起的振动，如严重的电缆振动现象——跳跃，将直接传递到细长的复合材料塔架结构中，可能导致广泛的损坏。因此，本研究旨在调查冰冻导线在不同电缆支撑条件下的跳跃行为。此外，假定在复合材料电力塔结构中增加阻尼以减轻导线跳跃，从而降低相邻导线之间相间闪络的风险。进行了一次数值跳跃模拟，以评估具有增强阻尼特性的刚性电缆-塔连接对电缆振动幅值的影响。研究了一个由3个300米跨距组成的塔-电缆系统。研究发现，导线的支撑条件对跳跃模式、振动幅值和特征跳跃椭圆的取向有显著影响。向塔架中添加阻尼略微降低了振动幅值，并导致跳跃椭圆的重新定向。所有数值有限元模拟数据均已上传，以便复制模型或进行不同类型的模拟。