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Numerical Algorithms for Calculating Temperature, Layered Stress, and Critical Current of Overhead Conductors

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  • Yongdou Liu
  • Zhiwei Chen
  • Quan Gu

Abstract

Accurate calculation of temperature, stress, sag, and critical current (corresponding to critical temperature) of operational overhead conductors is important for ensuring the strength and sag safety of overhead lines. Based on 2D steady-state heat transfer equations, this article studies the temperature fields of the cross section of typical electrified conductors and establishes numerical simulation methods for calculating the layered stress, sag, and critical temperature. Using the algorithm, the relationship between the critical temperature and characteristics of conductors (e.g., the sag and tensile force) is studied. The results are verified by a comparison with the test results for heat-resistant aluminum alloy conductors JNRLH1/G1A-400/65 and JNRLH1/G1A-630/55. Finally, the paper studies the relationship between the critical temperature of the conductor and its most sensitive factors.

Suggested Citation

  • Yongdou Liu & Zhiwei Chen & Quan Gu, 2020. "Numerical Algorithms for Calculating Temperature, Layered Stress, and Critical Current of Overhead Conductors," Mathematical Problems in Engineering, Hindawi, vol. 2020, pages 1-14, April.
    • Handle: RePEc:hin:jnlmpe:6019493
    DOI: 10.1155/2020/6019493
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    Cited by:

    1. Xin Li & Zuibing Xie & Linping Zeng & Long Zhao, 2024. "Calculation Methods of High-Voltage Direct Current (HVDC) Line Sag Considering Meteorology," Energies, MDPI, vol. 17(2), pages 1-13, January.

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