MATEC Web of Conferences
Volume 34, 20152015 2nd International Conference on Mechatronics and Mechanical Engineering (ICMME 2015)
|Number of page(s)||6|
|Section||Power electronics and electrical engineering|
|Published online||11 December 2015|
Experimental research on mechanical properties of high voltage transmission lines after the simulated wildfires
1 State Grid Shanxi Electric Power Research Institute, Taiyuan, 030001 China
2 College of Mechanics, Taiyuan University of Technology, Taiyuan, 030024 China
In order to determine whether the mechanical performance after the fires of high voltage transmission lines meets the requirements of normal use, this article simulates the wildfire, and does the mechanical performance experiment of high voltage transmission lines(HVT lines) after the simulated wildfires. The experiment studied the breaking force and elongation of each layer of 500kv HVT lines after the simulated wildfire. Experimental results show that, after fires, each layer of single aluminum wires of 500kv HVT lines have low breaking force which can be decreased obviously to half of that of new lines. For the steel core, decrease of breaking force is not obvious than aluminum wires, and with the increasing degree of wildfires, it increases gradually to a maximum of 35% of new steel lines’ breaking force. After wildfires, aluminum lines’ resistance ability of deformation decreases significantly, and its plastic deformation increases obviously during uniaxial tension. The steel core has little plastic deformation, and layers of aluminum become fluffy after fires. Therefore, the steel core main bearing load after wildfires.
© Owned by the authors, published by EDP Sciences, 2015
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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