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

Published: 28 March 2018| Version 1 | DOI: 10.17632/3gg4mc2n8t.1
Contributors:
Mathias Kliem,
Daniel Johansen,
Jan Høgsberg

Description

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.

Files

Steps to reproduce

The Dataset is structured as follows: 1) Abaqus_code (there you find the input files and cae files) 2) Fortran_code (contains the code of the UEL) 3) Python_code (the code for extracting the data in the post-processing step is presented) 4) Results_Location-dependent-displacements (here you can find the time-dependent displacements of the conductor line or the power pylon at the different locations specified in the paper: A, B, C and D) In all folders contain the following structure: Model_1-Insulator Model_2-DirectConnection Model_3-DirectConnection_withDamping

Institutions

Danmarks Tekniske Universitet

Categories

Structural Dynamics

License