Study on anti-galloping efficiency of rotary clamp spacers for eight bundle conductor line

Mou, Zheyue; Yan, Bo; Yang, Hanxu; Wu, Kaiwen; Wu, Chuan; Yang, Xiaohui

doi:10.1016/j.coldregions.2021.103414

Cited by 9 publications

(3 citation statements)

References 23 publications

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“…Besides, the installation and replacement of the quad-bundle spacer are carried out at high altitude, which makes the operation difcult and the handling efciency quite low. Terefore, the analysis and optimization on the mechanical structure and installation layout of the quad-bundle spacer [7][8][9][10][11][12][13][14][15] have become an area of research focus.…”

Section: Introductionmentioning

confidence: 99%

“…Xu et al [11] developed a new viscoelastic damper, and the numerical analysis results showed that it has high damping characteristics, good energy dissipation ability, and an antitilt efect. Mou et al [12] investigated the arrangement scheme of the octuple bundle ice-covered spacer damper by aerodynamic simulation and fnite element analysis and proposed an optimal installation scheme to control the line fyover. However, a lot of idealized assumptions were made in modelling and calculating when using the fnite element analysis and numerical simulation, which makes the obtained results hard to be confrmed and applied in realistic scenarios.…”

Section: Introductionmentioning

confidence: 99%

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Design and Test of Quad-Bundle Spacer Damper Based on a New Rubber Structure

Zhao

Liu

et al. 2023

Shock and Vibration

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Aiming at improving the handling efficiency and acquiring the satisfactory antivibration effect and damping performance, a quad-bundle spacer damper of 500 kV extra high voltage transmission lines was designed and developed based on a new rubber structure. Firstly, a mathematical vibration model of the spacer damper was constructed, and the structures of the defect-prone parts of the spacer damper were analyzed. Then, the structure was optimized based on the defect analysis, the clamp with fast installation as well as removal and the damper joint with superior performance were designed. On this basis, a new quad-bundle spacer damper was developed. Last but not least, the handling efficiency of the new quad-bundle spacer damper was evaluated, and performance tests were conducted according to the IEC standards. The evaluation and test results show that the handling efficiency, antivibration effect, and damping performance of the new quad-bundle spacer damper are significantly improved compared with those of the regular quad-bundle spacer damper, which provides a guarantee for the safe operation of 500 kV extra high voltage transmission lines.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Design and Test of Quad-Bundle Spacer Damper Based on a New Rubber Structure

Zhao

Liu

et al. 2023

Shock and Vibration

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“…Many scholars and scientific research institutions have conducted extensive research on transmission line galloping mechanisms, experiments and prevention technology [5]. Generally accepted galloping mechanisms include Den Hartog's vertical mechanism [6] and Nigol's torsional mechanism [7].…”

Section: Introductionmentioning

confidence: 99%

Design of an Electromagnetism-Based Transmission Line Galloping Test System

et al. 2022

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Existing transmission line full-scale tests rely on natural winds and have low test efficiency. In this paper, taking a reduced-scale test line with a 35.4 m span as an example, an electromagnetism-based transmission line galloping test system is designed. The plunger electromagnet periodically provides mechanical energy which vibrates the wire system in place of complex pneumatic loads. The finite element model of the electromagnet device is established and the influence of related parameters is analyzed. The power supply and control circuit of the excitation device are designed. The vibration of the transmission line is monitored by accelerometers and the displacement calculation method based on discrete wavelet transform (DWT) is proposed. Considering the geometric nonlinearity of the wire system, an adaptive excitation method based on wavelet decomposition and reconstruction of the acceleration signal is proposed. The vibration response of the wire under different coil currents and excitation modes is monitored and analyzed. The results show that the actual line galloping can be simulated by the designed electromagnetic system, the vibration frequency is close to the second natural frequency and the vibration amplitude can be controlled by changing the coil current.

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