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Analysis of ice disasters on ultra-high-voltage direct-current transmission lines

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Abstract

Ice disaster is one of the biggest natural disasters posing great threat to the safe operation of power grid. With the construction and operation of ultra-high-voltage direct-current (UHVDC) Transmission Project, it is urgent to carry out research on ice-coating and ice-melting of large-section current-carrying conductors to provide technical support for the safe operation of UHVDC transmission project. Researchers have made a large amount of research on small-section conductors. However, these research results for small-section conductors cannot be applied to large-section conductors. Thus, our research team carries out the research on ice-coating and ice-melting of large-section current-carrying conductors under artificial conditions. The typical large-section current-carrying conductor LGJ-630/55 is employed to analyze the ice-coating and ice-melting characteristics of large-section current-carrying conductors with some main factors, including wind, precipitation, temperature, current, and so on. Based on the experiments’ results, we have arrived at several rules of ice-coating and ice-melting of large-section current-carrying conductors. Meanwhile, an improved Ice-melting Model taking account Heat Exchange and Gravity (IMHEG) is proposed in this paper. This IMHEG model is verified to be more proper than the traditional ice-melting model, and can be a useful model for practical application.

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Acknowledgements

The authors appreciate the support from the State Key Program of State Grid Corporation of China. And special thanks are given to the anonymous reviewers and editors for their constructive comments.

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Authors and Affiliations

  1. State Key Laboratory of Disaster Prevention and Reduction for Power Grid Transmission and Distribution Equipment, State Grid Hunan Electric Company Disaster Prevention and Reduction Center, No. 79 Shuidian Road, Yuhua District, Changsha City, Hunan Province, China

    Jiazheng Lu, Jun Guo, Jianping Hu, Li Yang & Tao Feng

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  1. Jiazheng Lu
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  2. Jun Guo
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  3. Jianping Hu
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  4. Li Yang
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  5. Tao Feng
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Correspondence to Jiazheng Lu or Jun Guo.

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Lu, J., Guo, J., Hu, J. et al. Analysis of ice disasters on ultra-high-voltage direct-current transmission lines. Nat Hazards 86, 203–217 (2017). https://doi.org/10.1007/s11069-016-2682-5

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  • DOI: https://doi.org/10.1007/s11069-016-2682-5

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