| Project/Area Number |
63850055
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| Research Category |
Grant-in-Aid for Developmental Scientific Research (B).
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| Allocation Type | Single-year Grants |
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| Research Field |
電力工学
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| Research Institution | Toyota College of Technology (1990)
Nagoya University (1988-1989) |
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Principal Investigator |
HORII Kenji Toyota College of Technology, President, 校長 (70023223)
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| Co-Investigator(Kenkyū-buntansha) |
SUMI Shinich Chubu University, Engineering, Assist. Prof., 工学部, 教授 (00102773)
YODA Masayuki Aich Inst. of Tech., Assoc. Prof., 工学部, 助教授 (80103240)
AIBA Susumu Kanazawa Inst. of Tech., Prof., 工学部, 教授 (50104766)
NAKAMURA Koichi Nagoya Inst. of Tech., Assoc. Prof., 工学部, 助教授 (10024283)
KITO Yukio Nagoya University, Engineering, Prof., 工学部, 教授 (00023044)
池田 義一 中部大学, 工学部, 教授 (60065266)
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| Project Period (FY) |
1988 – 1990
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| Project Status |
Completed (Fiscal Year 1990)
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| Budget Amount *help |
¥13,900,000 (Direct Cost: ¥13,900,000)
Fiscal Year 1990: ¥4,000,000 (Direct Cost: ¥4,000,000)
Fiscal Year 1989: ¥4,500,000 (Direct Cost: ¥4,500,000)
Fiscal Year 1988: ¥5,400,000 (Direct Cost: ¥5,400,000)
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| Keywords | Rocket triggered lightning / Power transmission line / Arrester / Overhead ground wire / Space charge / Lightning current / Field mill / Electric field at ground / 雷放電 / 雷害防止技術 / 雷雲内電荷分布 / 避雷器 / 鉄塔 / ロゴスキ-電流計 / 雷撃電流 / 雷鳴 / 電力施設 / 雷界計 / 雷雲内の状況 / 雷放電路の再現 / 音響法 |
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| Research Abstract |
Since the first success of the experiment of triggered lightning by rocket on 22 December of 1977, the experiment in every winter in Hokuriku district was performed, and the total attained to 83 lightnings until 1987.
In this research for three years from 1988, the triggered lightning experiment to a test transmission line was succeeded together with the measurement of space charge under thundercloud with the measuring device carried by rocket, The total of triggered lightning for three years was 31 including 12 of lightning to the test transmission line and tower. A new triggering method by two stages rocket was developed with three times of successful triggerings.
The measurement of electric field at ground around the triggered lightning time and the measurements of electric current, thunder, and photograph of lightning discharge, etc were carried out. The measurement of characteristics of current flowing parallel through the legs of tower and over-head ground wire was also carried out as well as the measurement of over voltage appeared across the insulater of the line by the triggered lightning. The suppression effect for over voltage in the line by Zinc Oxide arrester set on the line was confirmed.
In the striking test to ground wire and Zinc Oxide arrester set on the ground, the relation between the damage or breakdown of them and the lightning current was made clear. The measurement of electric field in space by rocket with electric field senser and memory was successful two times. The electric field increased with the altitude until 40-50 KV/m at about 500 m in altitude inside of thundercloud. From the data, the distribution of space charge from the ground to the inside of thundercloud was made clear.
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