Dynamic Response of Tower-Line System Induced by Insulator Breakage Considering the Collision between the Conductor and the Ground Surface
Publication: Journal of Performance of Constructed Facilities
Volume 34, Issue 1
Abstract
Insulator fatigue, lighting strike, or flashover could result in the breakage of insulator strings. Insulator breakage can cause conductor impingement on the ground, which is a threat to the safe operation of a transmission line. To study the influence of this accident on the dynamic responses of a tower-line system, this paper proposes a method to simulate the impingement between the ground and a conductor, and then a finite element model (FEM) of a transmission tower-line system with four towers and five-span lines is established. Several cases are simulated to investigate the impingement between the conductor and the ground and its effect on the dynamic responses of the tower-line system after insulator breakage. The results show that the impingement decreases the vibration of the tower-line system. The traditional methods, neglecting the impingement between the conductor and the ground, overestimate the response of the structure, and the results thus do not accord with the actual situation. Therefore, it is necessary to consider the effect of the impingement between the conductor and the ground surface to better estimate the dynamic response of the tower-line system.
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Acknowledgments
This research was supported by the National Natural Science Foundation of China (Grant Nos. 51808100, 51708089), the China Postdoctoral Science Foundation (Grant Nos. 2018M631808 and 2017M620101) and the Fundamental Research Funds for the Central Universities (Grant Nos. N17010829, N170103014 and DUT17RC(3)007).
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Published In
Journal of Performance of Constructed Facilities
Volume 34 • Issue 1 • February 2020
Copyright
©2019 American Society of Civil Engineers.
History
Received: Nov 29, 2018
Accepted: May 28, 2019
Published online: Nov 19, 2019
Published in print: Feb 1, 2020
Discussion open until: Apr 19, 2020
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