Theoretical algorithm for maximum jump height of the conductor after ice-shedding considering elevation angle and nonlinearity

Li, M.Z.; Cai, Q.Q.

doi:10.1016/j.coldregions.2023.104088

Cited by 1 publication

(1 citation statement)

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“…Bian Rong et al considered the sudden change in the wind load caused by changes in the aerodynamic shape and the aerodynamic parameters at the moment of ice shedding, and analyzed the functional relationship between the maximum ice shedding jump height of a conductor and the difference in the sag in the stationary state before and after ice shedding [22]. The calculation formulas obtained from the above literature [23] are mostly aimed at a specific working condition and are no longer applicable to the ice shedding situation under the coupling effect of ice and wind.…”

Section: Introductionmentioning

confidence: 99%

Study on the Bouncing Process Induced by Ice Shedding on Overhead Conductors under Strong Wind Conditions

Dong,

Zhao,

et al. 2024

Applied Sciences

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Strong winds can lead to more complex ice shedding oscillation processes for overhead conductors, inducing flashovers, strand breakages and other accidents. This study analyzes the aerodynamic parameters of several typical icing features and establishes a numerical model for ice shedding on overhead conductors under strong wind conditions. The results show that for the same amount of icing, the resistance and lift force on the conductor changes with ice shape, wind attack angle and wind speed, which has a significant effect on the ice shedding jumping process. When the wind attack angle approaches 180°, the airflow resistance of the fan-shaped and D-shaped icing conductors significantly increases. And in the process of ice shedding response of transmission lines, the lateral amplitude may exceed 20 m, which increase the discharge risk of horizontally arranged conductors. Moreover, for the significant lateral oscillation of conductors by ice shedding under strong wind, the maximum horizontal displacement is approximately 1.6 times the difference in lateral position before and after ice shedding.

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Section: Introductionmentioning

confidence: 99%