Frontiers in Energy Research (Apr 2022)

Numerical Analysis on the Sub-Span Oscillation of Iced Eight-Bundle Conductors During Galloping

  • Liu Yu,
  • Cai Mengqi,
  • Cai Mengqi,
  • Wang Qingyuan,
  • Wang Qingyuan,
  • Wang Qingyuan,
  • Zhou Linshu,
  • Xu Qian,
  • Ding Shunli,
  • Liu Jun,
  • Huang Chunlin

DOI
https://doi.org/10.3389/fenrg.2022.888327
Journal volume & issue
Vol. 10

Abstract

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Under the excitement of wind loads, UHV transmission lines are subject to two types of vibration phenomena, namely, sub-span oscillation and galloping. This phenomenon can easily lead to conductor breakage, interphase flashover, fatigue damage to fittings, and even lead to tower collapse and disconnection accidents. The numerical analysis method is used to analyze the sub-span oscillation characteristics of the eight-bundle conductor during galloping. The results of the numerical simulation are compared to explore the influence of wind speed, span length, initial angle of wind attack, and turbulence intensity on the galloping line, looking for movement characteristics between each sub-conductor. The results provide a reference for research on the galloping principle of UHV transmission line and anti-oscillation to further improve the resistance of the power grid against disaster ability.

Keywords