Summary
In Japan, overhead transmission lines are exposed to various natural hazards such as earthquakes, snow, and typhoons, and different countermeasures have been applied. In particular, heavy snow accretion on conductors has caused serious problems, including tower collapse and sleet-jump events. For this reason, snow-resistant rings and counterweights have been installed on conductors where heavy snow accretion is expected. The snow-resistant ring suppresses snow accretion that develops along the lay direction of the conductor, while the counterweight reduces snow accretion by preventing conductor twisting caused by uneven snow loading. We have to attach snow-resistant rings and counterweights to the conductor after stringing. This work requires considerable time and effort, especially in long-span sections or mountainous areas with large elevation differences. To eliminate the need for additional attachments, we developed a conductor with inherent anti-snow-accretion performance.
Read more Read lessLaboratory tests demonstrated that the developed conductor reduces both snow accretion and wind pressure compared to the standard conductor.
A field test using natural snow is currently being conducted with the developed conductor. Field application utilizing the features of this conductor is also planned.
Additional informations
| Publication type | Session Materials |
|---|---|
| Reference | B2_12611_2026 |
| Publication year | |
| Publisher | CIGRE |
| Country | Serbia |
| Study committees | |
| File size | 787 KB |
| Price for non member | 30 € |
| Price for member | 30 € |
Authors
TAKAHASHI Shohei - TEPCO Power Grid, Inc. Japan; TAKADA Noriyuki - TEPCO Power Grid, Inc. Japan; SHIRAISHI Tomonori - TEPCO Power Grid, Inc. Japan; SUGA Nobuaki - Sumitomo Electric Industries,Ltd Japan; TAKAHASHI Tadahiro - Sumitomo Electric Industries,Ltd Japan; ENAKA Taisei - Sumitomo Electric Industries,Ltd Japan
Keywords
Field test, Multi-function conductors, Snow accretion, Wind pressure
