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Volume 33 Issue 4
Jul 2019
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Chinese Journal of High Pressure Physics  > 2019  >  33(4): 045902.
REN Xianda, LIU Jiaqiong, TANG Zhen, WU Xiaogang, CHEN Weiyi. Experimental Analysis of Fatigue Performance in Transmission Lines at Different Annealing Temperatures[J]. Chinese Journal of High Pressure Physics, 2019, 33(4): 045902. doi: 10.11858/gywlxb.20180566
Citation: REN Xianda, LIU Jiaqiong, TANG Zhen, WU Xiaogang, CHEN Weiyi. Experimental Analysis of Fatigue Performance in Transmission Lines at Different Annealing Temperatures[J]. Chinese Journal of High Pressure Physics, 2019, 33(4): 045902. doi: 10.11858/gywlxb.20180566
shu

Experimental Analysis of Fatigue Performance in Transmission Lines at Different Annealing Temperatures

doi: 10.11858/gywlxb.20180566
  • 1.

    Institute of Applied Mechanics and Biomedical Engineering, School of Biomedical Engineering, Taiyuan Polytechnic University, Taiyuan 030024, China

  • 2.

    Shanxi Electric Power Research Institute, Taiyuan 030001, China

  • Received Date: 18 Jun 2018
  • Rev Recd Date: 28 Jun 2018
    Abstract
  • Transmission line is the important equipment to transport electrical energy through power grid. Mountain fires are frequent events in recent years, which severely damages the safe operation of the high voltage transmission lines. Therefore, it is very important to study the mechanical characteristics of transmission lines after mountain fire. Based on the simulation test of transmission lines in the mountain fire, we studied the effects of the annealing temperature on the fatigue of overhead transmission lines. The fatigue failure of the transmission lines in aeolian vibration was reflected in the continuous axial fatigue tensile state. First, we conducted an experiment by the thermostatic tube X resistance furnaces to stimulate different transmission lines (JL/G1A-400/35, JL/G1A-300/25, JL/G1A-240/30, JL/G1A-300/40) burned in the mountain fire at different temperatures. Then, we carried out a fatigue tensile test on the single transmission line, and found that the frequency of fatigue tensile failure was correlated with temperature. Furthermore, we compared the data between new transmission lines and those burned in an actual mountain fire. Finally, we proposed reference for the protection of transmission lines in a mountain fire and prevention against being burned. The results showed that the fatigue limit of wires was reduced with the rise of the temperature. When the temperature was between 250 ℃ and 300 ℃, the tensile cycle times deceases sharply; when the temperature is above 300 ℃, it tended to be stable.

     

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