| Wind Watch is a registered educational charity, founded in 2005. |
Lightning is nemesis of windmills, threatening Japan’s renewable energy campaign
Credit: The Mainichi Daily News, mdn.mainichi.jp 4 November 2011 ~~
Translate: FROM English | TO English
Translate: FROM English | TO English
SAPPORO – As Japan moves to shift away from nuclear power, wind power, a potential key player among renewable energy sources, faces a stubborn foe: lightning.
Hokkaido hosts 266 windmills, the most among Japan’s 47 prefectures, and about 90 percent of them are located along the Sea of Japan coast, where lightning frequently occurs between fall and winter.
But no definite way to solve the problem is in sight and operators of these windmills are struggling to cope with lightning-caused breakdowns that threaten their operations.
A windmill burns at the Sarakitomanai wind farm in Wakkanai, Hokkaido, on Oct. 2. Its electricity generator was destroyed. (Mainichi)
On Oct. 2, a fire broke out at the Sarakitomanai wind farm in Wakkanai. A lightning alert was issued at the time and the operator, Sarakitomanai Wind Power Corp., suspects lightning was responsible for the fire.
The fire burned the 66-meter-tall windmill for about four hours from shortly after noon and destroyed a generator called a nacelle. Masao Shigemoto, 64, who witnessed the fire, said, “Smoke billowed out and it suddenly caught fire.”
According to the New Energy and Industrial Technology Development Organization (NEDO) and the Central Research Institute of Electric Power Industry, there were 795 windmill breakdowns between 2004 and 2009, and lightning accounted for 197, including 33 in Hokkaido.
Dealing with lightning is a problem shared by wind power operators around the world, but it is particularly important in Japan. Many of the country’s windmills are situated along the Sea of Japan coast, where lightning occurs frequently by global standards.
Lightning occurs when there is a violent convection of air while large differences exist between temperatures high in the air and on the earth’s surface. The Sapporo District Meteorological Observatory says lightning frequently occurs around the towns of Tomamae and Suttu in early autumn due to cold fronts from Siberia, and the lightning occurrences gradually advance southward.
The fact that many windmills are manufactured in accordance with European standards has added to the problem. Getting repair parts from abroad raises costs and can keep the windmills offline for several months.
Mitsubishi Heavy Industries Ltd., one of Japan’s biggest windmill manufacturers, says, “We initially produced windmills by international standards, but they were seriously damaged by lightning. We are now improving our windmills by doubly attaching (lightning) receptors to the blades and making the power generators more fire resistant.”
This article is the work of the source indicated. Any opinions expressed in it are not necessarily those of National Wind Watch.
The copyright of this article resides with the author or publisher indicated. As part of its noncommercial educational effort to present the environmental, social, scientific, and economic issues of large-scale wind power development to a global audience seeking such information, National Wind Watch endeavors to observe “fair use” as provided for in section 107 of U.S. Copyright Law and similar “fair dealing” provisions of the copyright laws of other nations. Send requests to excerpt, general inquiries, and comments via e-mail.
| Wind Watch relies entirely on User Funding |
 (via Stripe) |
 (via Paypal) |
Share:
[ Short URL: https://wind-watch.org/news/?p=15058 ]
