The long span problem in the analysis of conductor vibration damping

Rawlins, C.B.

doi:10.1109/61.853018

Cited by 13 publications

(3 citation statements)

References 7 publications

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“…Overhead transmission lines play a vital role in power transmission systems. A high-voltage overhead transmission line with the feature of the extended span and high section is prone to aeolian vibration under the action of wind load induced by Von Karman vortex, , which is a high-frequency vibration standing wave alternating in the vertical direction of transmission line with a vibration frequency of 10–60 Hz and amplitude of less than 10 mm. Continuous aeolian vibration can further aggravate the fatigue of transmission lines and even lead to strand and wire breakage and tower collapse, which seriously threatens the security and reliability of power grids. − Thereby, it is significant to realize the real-time monitoring of aeolian vibration, which mainly depends on the development of sensor technology through monitoring the vibration state of transmission lines.…”

Section: Introductionmentioning

confidence: 99%

Hybridized Triboelectric-Electromagnetic Aeolian Vibration Generator as a Self-Powered System for Efficient Vibration Energy Harvesting and Vibration Online Monitoring of Transmission Lines

Gao,

Feng,

Wang

et al. 2023

ACS Appl. Mater. Interfaces

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In this work, based on the triboelectric-electromagnetic working principle, a comprehensive strategy appropriately hybridizes a multilayered elastic structure TENG (ME-TENG) and a doubleelectromagnetic generator (EMG) for efficient aeolian vibration energy harvesting and vibration state monitoring. The ME-TENG with the feature of elasticity is integrated with a movable plate embedded with a magnet as the counterweight, which acts as a spring-like mass system in response to external vibration excitation, making the inseparable integrity of the TENG and EMG. The basic hybridized triboelectric-electromagnetic aeolian vibration generator (HAVG) consisting of ME-TENG and double-EMGs in terms of structural parameters and response characteristics is first optimized and discussed, thereby the efficient vibration energy harvesting and effective vibration state response can be further improved through the mutual complementarity of TENG and EMG. Furthermore, the self-powered capacity of the HAVG in terms of LED arrays and a wireless ambient temperature and humidity monitoring system is verified through the hybrid charging strategy of TENG and EMG modules and the combination of HVAG and energy management circuits, benefiting from the sophisticated-designed structure and excellent output performance of the HAVG. Importantly, a self-powered aeolian vibration monitoring system is established and demonstrated for vibration-state sensing and abnormal vibration alarm. This work demonstrates a novel strategy for energy harvesting and state sensing of overhead transmission line aeolian vibration, which not only reveals TENG-EMG promising potential for energy harvesting for aeolian vibration, but also provides valuable guidance for the construction of a self-powered online-monitoring system for transmission lines.

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Section: Introductionmentioning

confidence: 99%

Hybridized Triboelectric-Electromagnetic Aeolian Vibration Generator as a Self-Powered System for Efficient Vibration Energy Harvesting and Vibration Online Monitoring of Transmission Lines

Gao,

Feng,

Wang

et al. 2023

ACS Appl. Mater. Interfaces

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“…Lu [8] used ANSYS to analyze the statics and dynamics of the U-shaped ring, and obtained the maximum equivalent stress and dangerous contact area of the U-shaped ring. The breeze vibrations were investigated on large transmission lines by Rawlins [9]. Urchegui et al [10] studied the influence of different factors on the fretting wear of steel strand and put forward measures to alleviate the wear of steel strand.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of U-Shaped Metal Rings in a Wind-Sand Environment

Wang¹,

Li²,

Chai³

et al. 2021

Fluid Dynamics &Amp; Materials Processing

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The interaction of U-shaped rings used for power transmission hardware with a wind-sand field is simulated numerically. A standard k À turbulence model is used in synergy with an Eulerian-Lagrangian approach. The results show that the wind pressure on the windward side of the U-shaped ring is the highest, a negative pressure zone appears on both sides of the U-shaped ring, while a Kármán Vortex Street is created on its leeward side. There are three possible regimes of motion for the sand grains in the wind field. Sand grains with size below 0.125 mm can follow the airflow directly into the contact area of two U-shaped rings. When the sand size is about 0.1 mm, the number of sand grains that are blown into the contact area attains a maximum. Through the simulation of U-shaped rings in the wind-sand field, the dynamics of such processes are explained in detail, thereby providing relevant information for the subsequent protection and design of connecting hardware used for power transmission.

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“…The aeolian vibration waveform and amplitude of large crossing transmission lines have been studied by Rawlins ， C.B. [5], who considered large crossing span effect of large crossing transmission line lead to lower damping demand of cross-end. The theoretical and experimental research about mechanical properties of the type of Stockbridge the TLFVD have been done by Diana.…”

Section: Introductionmentioning

confidence: 99%

Parametric Study of Transmission Line Fitting Vibration Damper Based on Modal Analysis

Qian

Cheng

Wang

et al. 2014

AMR

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<p>This paper is related to the vibration analysis of transmission line fitting vibration damper (TLFVD) using commercial ANSYS program. According to the basic structure of the TLFVD, the three dimensional model with different parameters including diameter and length of strand is established. Through the modal analysis of the TLFVD using ANSYS WORKBENCH, the first four-order natural frequencies and mode shapes is obtained. Comparing the simulation data of vibration characteristics, the effects of model parameters on the natural frequency are summarized. Finally, the optimized model has been selected from various models established, and the resonant frequency of the TLFVD was verified by the harmonic response analysis. As a result, the optimized model structure of the TLFVD is presented.</p>

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The long span problem in the analysis of conductor vibration damping

Cited by 13 publications

References 7 publications

Hybridized Triboelectric-Electromagnetic Aeolian Vibration Generator as a Self-Powered System for Efficient Vibration Energy Harvesting and Vibration Online Monitoring of Transmission Lines

Hybridized Triboelectric-Electromagnetic Aeolian Vibration Generator as a Self-Powered System for Efficient Vibration Energy Harvesting and Vibration Online Monitoring of Transmission Lines

Numerical Simulation of U-Shaped Metal Rings in a Wind-Sand Environment

Parametric Study of Transmission Line Fitting Vibration Damper Based on Modal Analysis

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