期刊
IET GENERATION TRANSMISSION & DISTRIBUTION
卷 13, 期 4, 页码 536-542出版社
INST ENGINEERING TECHNOLOGY-IET
DOI: 10.1049/iet-gtd.2018.5258
关键词
power transmission lines; power overhead lines; ice; freezing; power grids; overhead line conductors; power transmission protection; ice disaster; power grid; expanded conductors; heavy icing area; continuous power supply conditions; short-circuit ice melting method; icing performance; conductive cross-sectional area; bundled conductors; crescent-shaped conductors; power function relationship; ice thickness; tested conductors; Single-Cylinder Ice Collector; ice amount reduction rate; combined ice-wind load ratio; low-cost method; anti-icing capacity; transmission lines; icing disaster
资金
- National Natural Science Foundation of China [51637002]
- graduate scientific research and innovation foundation of Chongqing, China [CYB16019]
Considering continuous power supply conditions, there is currently no effective method for preventing ice disaster, and also some deficiencies of the existing completed short-circuit ice melting method has been found. Here, taking typical bundled and expanded conductors as the sample, its icing performance was tested and the combined ice-wind load of tested lines was analysed. Then, a new method of substituting expanded conductors with the same conductive cross-sectional area for bundled conductors to prevent ice disasters is proposed. Research results showed that: from stagnation point to both sides of crescent-shaped conductors, local collision rate gradually reduce to 0; under various meteorological factors, there is still a power function relationship between ice thickness of conductors (D-c) and the diameter of conductors (D); the ice amount of six tested conductors gradually increases with the increase of ice thickness of Rotating Single-Cylinder Ice Collector (D-r), while the ice amount reduction rate reduces first and then increases with D-r; the combined ice-wind load ratio of bundled and expanded conductors increases with the increase of wind speed and D-r. Therefore, it is a low-cost method for improving the anti-icing capacity of transmission lines and preventing icing disaster once and for all.
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