Dynamic characteristics of electric transmission lines undergone blasting de-icing

XIE Dongsheng; SUN Tao; SHI Zhuopeng; ZHI Shenglong; SHI Linsheng; LI haitao

doi:10.11883/bzycj-2020-0170

Volume 41 Issue 6

Jun. 2021

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SHANG Hailin, HU Qiushi, LI Tao, FU Hua, HU Haibo. One-dimensional theory for pressurization process in explosive crack burning[J]. Explosion And Shock Waves, 2020, 40(1): 011403. doi: 10.11883/bzycj-2019-0345

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XIE Dongsheng, SUN Tao, SHI Zhuopeng, ZHI Shenglong, SHI Linsheng, LI haitao. Dynamic characteristics of electric transmission lines undergone blasting de-icing[J]. Explosion And Shock Waves, 2021, 41(6): 065102. doi: 10.11883/bzycj-2020-0170

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Dynamic characteristics of electric transmission lines undergone blasting de-icing

doi: 10.11883/bzycj-2020-0170

1.
State Grid Shanxi Economic and Technical Research Institute, Taiyuan 030002, Shanxi, China
2.
School of Science, North University of China, Taiyuan 030051, Shanxi, China

Received Date: 2020-05-29
Rev Recd Date: 2020-08-18

Available Online: 2021-06-10

Publish Date: 2021-06-05

Abstract

Abstract

In order to study the dynamic characteristics of electric transmission lines undergone blasting de-icing and the corresponding de-icing effects, model experiments on the isolated transmission lines with a span of 50 m were carried out. The artificial icing was performed out and the detonating cords preset at the lower sides of the transmission lines were detonated to remove partial ice covers of the transmission lines. The displacements and dynamic tensions of three kinds of transmission lines were measured during blasting de-icing. The blasting load was simplified as a triangular wave load, and the experimental conditions were simulated and verified by the finite element software ABAQUS. Furthermore, the effects of the de-icing positions on the jumping height and dynamic tension were explored when the ice was removed by twenty percent. The results show that for glaze ice, the blasting action can only cause the ice to fall off in the blasting area of the transmission lines. The amplitudes of the jumping and dynamic tension induced by blasting de-icing are greater than those by natural de-icing at the same locations, and their changing trends with de-icing location are similar to those by natural de-icing. Compared with the conductor, the jump amplitudes of the ground wire and the optical cable are more significantly affected by blasting.
- transmission line,
- blasting de-icing,
- finite element method,
- jumping amplitude,
- dynamic tension

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