Development of a Wind Spoiler Anti-Galloping Device for Bundle Conductors of UHV Overhead Transmission Lines

Si, Jiajun; Rui, Xiaoming; Liu, Bin; Lixian, Zhou; Liu, Shengchun

doi:10.1109/tpwrd.2019.2943383

Cited by 8 publications

(2 citation statements)

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“…When the natural wind blows over the overhead transmission lines, the transmission lines vibrate due to the effect of Kármán vortex street (Dutkiewicz and Machado, 2019), and it is called aeolian vibration of the transmission lines (Barry et al, 2012;Foti and Martinelli, 2018;Dutkiewicz and Machado, 2019;Si et al, 2020). The wind speed ranges from 1 to 7 m s −1 , and the frequency of aeolian vibration, depending on the conductor diameter and the wind speed, ranges from 3 to 150 Hz (Barry et al, 2012;Dutkiewicz and Machado, 2019).…”

Section: Introductionmentioning

confidence: 99%

“…To reduce the vibration amplitude to the allowable fatigue limit line, some protective devices have been developed and used in the transmission lines. Among these devices, a Stockbridge type vibration damper, which was invented by Stockbridge (1928), is widely used for its wide range of frequencies Foti and Martinelli, 2018;Barbieri et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

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The approximate calculation of the natural frequencies of a Stockbridge type vibration damper and analysis of natural frequencies' sensitivity to the structural parameters

et al. 2021

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Abstract. Vibration damper is widely used in overhead transmission lines to alleviate aeolian vibration. Its natural frequencies are important parameters for a vibration damper. In this paper, the approximate calculation formulas of natural frequencies of the one-side subsystem of a Stockbridge type vibration damper were derived and the design sensitivity analysis of the natural frequencies was studied using partial differential equations with respect to each concerned parameter including the length of the steel strand, the mass of the counterweight, the eccentric distance, and the radius of gyration of the counterweight. Through a case study that considered a variation of up to ±30 % in the values of the design parameters, the exact calculation and approximate calculation results of the natural frequencies were analysed, and the sensitivity of the vibration damper's natural frequencies to the design parameters was studied. The results show that, within the range of the parameters used in this study, the approximately calculated first-order frequency is lower than the exact values, whereas the approximately calculated second-order frequency is larger than the exact values. The sensitivity analysis indicates that the first-order frequency is highly sensitive to the steel strand's length, whereas it is moderately sensitive to the counterweight's mass and slightly sensitive to the eccentric distance and the gyration radius of the counterweight; the second-order frequency is highly sensitive to the steel strand's length and the gyration radius of the counterweight, moderately sensitive to the counterweight's mass, and slightly sensitive to the eccentric distance. It will provide theoretical guidance and approximate analysis method in engineering for the design of the vibration damper.

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