Analysis of ice disasters on ultra-high-voltage direct-current transmission lines
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- 作者：Jiazheng Lu ; Jun Guo ; Jianping Hu ; Li Yang ; Tao Feng
- 关键词：Large ; section conductors ; UHV transmission lines ; Ice disaster ; Transmission lines
- 刊名：Natural Hazards
- 出版年：2017
- 出版时间：March 2017
- 年：2017
- 卷：86
- 期：1
- 页码：203-217
- 全文大小：
- 刊物类别：Earth and Environmental Science
- 刊物主题：Natural Hazards; Hydrogeology; Geophysics/Geodesy; Geotechnical Engineering & Applied Earth Sciences; Civil Engineering; Environmental Management;
- 出版者：Springer Netherlands
- ISSN：1573-0840
- 卷排序：86
文摘
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.