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Observation of galloping of four-bundled conductors on ice-accreted overhead transmission lines
| Content Provider | Semantic Scholar |
|---|---|
| Author | Matsumiya, Hisato Nishihara, Takashi Shimizu, Mikio Yukino, Teruhiro |
| Copyright Year | 2012 |
| Abstract | In this paper, we present the observation results of the galloping of ice-accreted overhead transmission lines. We conducted field observations of four-bundled conductors in a full-scale test line constructed at a site where ice accretion was found to occur frequently. On December 21, 2009, we observed galloping of ice-accreted overhead transmission lines. The conductors vibrated mainly in the vertical twoloop/span mode, in accompaniment with horizontal and torsional oscillations. The maximum peak-to-peak amplitudes of the vertical, horizontal, and torsional vibrations were as large as 5 m, 3 m, and 90°, respectively. Furthermore, we observed galloping to occur in a limited wind-speed range. This conditional occurrence of galloping can be explained as follows. The range of the angle of attack where galloping occurred was limited, whereas the static angle of attack increased with the wind speed. Galloping thus occurs when the angle of attack increases to values in the limited range. With further increases in wind speed, the angle of attack exceeds the limited range and galloping ceases to occur. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://www.i-asem.org/publication_conf/acem12/T3A-5.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
