2010 Fiscal Year Final Research Report
The lightning protection method using pre-phenomena prior to the lightning hitting to a windmill
| Project/Area Number |
20360125
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Power engineering/Power conversion/Electric machinery
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| Research Institution | Gifu University |
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Principal Investigator |
TAKAGI Nobuyuki Gifu University, 工学部, 教授 (80179415)
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| Co-Investigator(Kenkyū-buntansha) |
WANG Daohong 岐阜大学, 工学部, 准教授 (20273120)
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| Project Period (FY) |
2008 – 2010
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| Keywords | 雷 / 風力発電 / 防雷対策 |
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| Research Abstract |
We have found the occurrence of three pre-phenomena immediately prior to the lightning hitting to a wind mill and its protection tower. The first one is the pre-current with a magnitude of several amperes which flow for a few seconds before the initiation of an upward lightning. The second one is the pre-light-emission from the tip of the wind turbine blade associated with an un-continuous progressing discharge over a distance of several meters. The last one is the phenomenon of increasing electric field strength in the area of several kilometers around the windmill. We have confirmed the possibility of forecasting lightning two seconds ahead using the pre-current.
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