Study on Adaptive Excitation System of Transmission Line Galloping Based on Electromagnetic Repulsive Mechanism
Due to the uncontrollable weather conditions, it is difficult to carry out the controllable prototype test to study fatigue damage of transmission tower and armour clamp and the effect evaluation of antigalloping device under actual transmission line galloping. Considering the geometric nonlinearity...
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Hindawi Limited
2021
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oai:doaj.org-article:52648aed0b8744688c592fd0a3a715362021-11-08T02:35:26ZStudy on Adaptive Excitation System of Transmission Line Galloping Based on Electromagnetic Repulsive Mechanism1875-920310.1155/2021/2428667https://doaj.org/article/52648aed0b8744688c592fd0a3a715362021-01-01T00:00:00Zhttp://dx.doi.org/10.1155/2021/2428667https://doaj.org/toc/1875-9203Due to the uncontrollable weather conditions, it is difficult to carry out the controllable prototype test to study fatigue damage of transmission tower and armour clamp and the effect evaluation of antigalloping device under actual transmission line galloping. Considering the geometric nonlinearity of the transmission line system, this study proposed an adaptive excitation method to establish the controllable transmission line galloping test system based on the Den Hartog vertical oscillation mechanism. It can skip the complicated process of nonlinear aerodynamic force simulation. An electromagnetic repulsion mechanism based on the eddy current principle was designed to provide periodic excitation for the conductor system according to the adaptive excitation method. The finite element model, including conductor, insulator string, and electromagnetic mechanism, was established. Newmark method and fourth-order Runge-Kutta algorithm were used to complete the integrated simulation calculation. By comparing with the measured data record of the actual transmission line galloping test, the results show that the proposed adaptive galloping excitation system can effectively reconstruct the key characteristics of the actual transmission line galloping, such as amplitude, frequency, galloping mode, and dynamic tension, and make the galloping state controllable. Thus, a series of research about transmission line galloping with practical engineering significance can be carried out.Jiangjun RuanLi ZhangWei CaiDaochun HuangJian LiZhihui FengHindawi LimitedarticlePhysicsQC1-999ENShock and Vibration, Vol 2021 (2021) |
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Physics QC1-999 Jiangjun Ruan Li Zhang Wei Cai Daochun Huang Jian Li Zhihui Feng Study on Adaptive Excitation System of Transmission Line Galloping Based on Electromagnetic Repulsive Mechanism |
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Due to the uncontrollable weather conditions, it is difficult to carry out the controllable prototype test to study fatigue damage of transmission tower and armour clamp and the effect evaluation of antigalloping device under actual transmission line galloping. Considering the geometric nonlinearity of the transmission line system, this study proposed an adaptive excitation method to establish the controllable transmission line galloping test system based on the Den Hartog vertical oscillation mechanism. It can skip the complicated process of nonlinear aerodynamic force simulation. An electromagnetic repulsion mechanism based on the eddy current principle was designed to provide periodic excitation for the conductor system according to the adaptive excitation method. The finite element model, including conductor, insulator string, and electromagnetic mechanism, was established. Newmark method and fourth-order Runge-Kutta algorithm were used to complete the integrated simulation calculation. By comparing with the measured data record of the actual transmission line galloping test, the results show that the proposed adaptive galloping excitation system can effectively reconstruct the key characteristics of the actual transmission line galloping, such as amplitude, frequency, galloping mode, and dynamic tension, and make the galloping state controllable. Thus, a series of research about transmission line galloping with practical engineering significance can be carried out. |
format |
article |
author |
Jiangjun Ruan Li Zhang Wei Cai Daochun Huang Jian Li Zhihui Feng |
author_facet |
Jiangjun Ruan Li Zhang Wei Cai Daochun Huang Jian Li Zhihui Feng |
author_sort |
Jiangjun Ruan |
title |
Study on Adaptive Excitation System of Transmission Line Galloping Based on Electromagnetic Repulsive Mechanism |
title_short |
Study on Adaptive Excitation System of Transmission Line Galloping Based on Electromagnetic Repulsive Mechanism |
title_full |
Study on Adaptive Excitation System of Transmission Line Galloping Based on Electromagnetic Repulsive Mechanism |
title_fullStr |
Study on Adaptive Excitation System of Transmission Line Galloping Based on Electromagnetic Repulsive Mechanism |
title_full_unstemmed |
Study on Adaptive Excitation System of Transmission Line Galloping Based on Electromagnetic Repulsive Mechanism |
title_sort |
study on adaptive excitation system of transmission line galloping based on electromagnetic repulsive mechanism |
publisher |
Hindawi Limited |
publishDate |
2021 |
url |
https://doaj.org/article/52648aed0b8744688c592fd0a3a71536 |
work_keys_str_mv |
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