Mitigation of conductor line galloping by a direct cable-connection to non-conductive composite power pylons
| Autor: | Jan Becker Høgsberg, Mathias Kliem, Daniel Johansen |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Galloping conductor lines 020209 energy lcsh:Mechanical engineering and machinery Glass fiber Insulator (electricity) 02 engineering and technology Ellipse 0203 mechanical engineering 0202 electrical engineering electronic engineering information engineering Pylon General Materials Science lcsh:TJ1-1570 Electrical conductor Non-conductive composite power pylons direct cable-pylon connection business.industry Mechanical Engineering Numerical galloping simulation Structural engineering Conductor Vibration Direct cable-pylon connection 020303 mechanical engineering & transports Electric power transmission galloping conductor lines non-conductive composite power pylons business numerical galloping simulation |
| Zdroj: | Journal of Vibroengineering, Vol 20, Iss 6, Pp 2268-2288 (2018) Kliem, M, Johansen, D & Høgsberg, J 2018, ' Mitigation of conductor line galloping by a direct cable-connection to non-conductive composite power pylons ', Journal of Vibroengineering, vol. 20, no. 6, pp. 2268-2288 . https://doi.org/10.21595/jve.2018.19978 |
| ISSN: | 2538-8460 1392-8716 |
| Popis: | 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 3×300 m 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. |
| Databáze: | OpenAIRE |
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