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Ice shedding problems have severely threatened the safety of overhead transmission lines and caused enormous ruptures or failures of the conductors and their accessories. It is of great importance to study the dynamic properties of the transmission lines under ice shedding loads. To perform such analysis, the dynamic behavior of two typical strain sections for UHVDC transmission lines under different ice shedding conditions were simulated in this paper. Then, the dynamic response of the key tension plate as well as its buckling properties was analyzed based on the extacted ice shedding results. Finally, laboratory tests were conducted at the China Electric Power Research Institute to assess the critical value of the buckling of the tension plate. The results show that the key tension plate studied in this paper is primarily influenced by the loads along the transmission lines after taking its dynamic response and buckling properties under synthetic ice shedding conditions into consideration. The short-term fluctuation of the tension should be the major focus in tension plate designs.


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Dynamic Response of Tension Plate for UHVDC Transmission Lines Under Ice Shedding Loads

Show Author's information Jiajun Si ( )Lixian ZhouKuanjun ZhuHongyan ZhaoBin LiuXiaoming RuiShengchun Liu
China Electric Power Research Institute, Beijing 100192, China
North China Electric Power University, Beijing 102206, China
China Electric Power Research Institute, Beijing 100192, China
Beijing Institute of Astronautical Systems Engineering, Beijing 100075, China
North China Electric Power University, Beijing 102206, China

Abstract

Ice shedding problems have severely threatened the safety of overhead transmission lines and caused enormous ruptures or failures of the conductors and their accessories. It is of great importance to study the dynamic properties of the transmission lines under ice shedding loads. To perform such analysis, the dynamic behavior of two typical strain sections for UHVDC transmission lines under different ice shedding conditions were simulated in this paper. Then, the dynamic response of the key tension plate as well as its buckling properties was analyzed based on the extacted ice shedding results. Finally, laboratory tests were conducted at the China Electric Power Research Institute to assess the critical value of the buckling of the tension plate. The results show that the key tension plate studied in this paper is primarily influenced by the loads along the transmission lines after taking its dynamic response and buckling properties under synthetic ice shedding conditions into consideration. The short-term fluctuation of the tension should be the major focus in tension plate designs.

Keywords: Dynamic response, ice shedding effect, nonlinear buckling, tension plate, UHVDC transmission lines

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Publication history

Received: 24 April 2020
Revised: 27 June 2020
Accepted: 17 August 2020
Published: 06 October 2020
Issue date: May 2022

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© 2020 CSEE

Acknowledgements

Acknowledgements

This work was supported by the Science and Technology Project of the State Grid Corporation of China “Research on Optimization of Typical Tension Insulator String and Quality Improvement of Key Fittings for UHV Transmission Line” (GCB17201900164).

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