| Project/Area Number |
23560339
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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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 | Tokai University |
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Principal Investigator |
OKANO Daisuke 東海大学, 熊本教養教育センター, 教授 (00169129)
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| Project Period (FY) |
2011 – 2013
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2013: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2012: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2011: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
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| Keywords | 落雷 / 高圧気相 / 雷サージ / コンクリート / 内部雷保護 / 模擬海水 / 雷インパルス電源 / 放電様相 / パッシェンカーブ / 雷インパルス放電 / 放電開始電圧 / 放電インピーダンス / モルタル |
|---|
| Research Abstract |
To reduce the lightning current via the ground into power generation systems near the coast, the impulse discharge experiments have been performed using the building material gap soaked by a simulated sea under high-pressure dry-air conditions. The results are as follows; (1) in the case of mortar gap soaked by a simulated sea, using the KCl water solution, the discharge waveforms has unipolar ones and the discharge threshold voltage is reduced to 33 % compared with the dry gap, (2) in the case of concrete gap soaked by a simulated sea in dry-air within 5 atm, the discharge emission pattern widely expands on the concrete surface and the peak current amplitudes are also reduced to 47 % compared with the dry gap, where this means that discharge resistance in a concrete volume increases with increasing air pressures, and (3) it is considered that an application of the concerned study is available against lightning current invasion in the region surround a grounding system.
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