SHIELDING EFFECT OF SURROUNDED SPACE CHARGE ON THE LIGHTNING STRIKING CHARACTERISTIC TO THE POWER LINE AND THE INVESTIGATION BY ARTIFICIAL TRIGGERED LIGHTNING APPROACH

周围空间电荷对输电线路雷击特性的屏蔽效应及人工触发雷法研究

• 批准号: 08555069
• 负责人: NAKAMURA Koichi
• 金额: $ 5.25万
• 依托单位: NAGOYA INSTITUTE OF TECHNOLOGY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 1996
• 资助国家: 日本
• 起止时间: 1996 至 1998
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08555069/
• 关键词: space charge; corona discharge current; transmission line and tower; electric field intensity; shielding effect; triggered lightning to tower; energy of lightning discharge channel; optical, electrical and acoustic measurements

In order to make clear the shielding effect of surrounded space charge on the lightning striking characteristic to the transmission line, the measurement of the corona discharge current emitted from a transmission tower was performed, and the artificial triggered lightning tests for the transmission line were carried out in parallel. During three years since 1996, the experiments have been performed in Mt. Okushishikui near Japan sea for winter thundercloud. The experiments were continued during one month on November in each year. The results were as follows,(1) The corona discharge current measurement was performed at eight arm ends of a test transmission tower which is 60 meters high. The maximum current was more than 500 A which was measured at one arm end on the up pest level. The currents at the lower level were comparatively smaller than the upper level.(2) The average charge of the current from the whole arms of the tower was around 0.1 C/hour under the exposure of thundercloud.(3) The artificial triggered lightning experiment was performed using rocket. First the rocket carries a bobbin from which a nylon line was pulled out and a wire connected follows. The nylon line was used for insulation of wire from the ground. The length of the nylon line was 160m. Thirteen times of triggered lightning struck the transmission line and tower. It is estimated that the lightning strikes to the transmission line and tower take place in the surrounded air with such space charge.(4) Additional seventeen times of triggered lightning were obtained to strike the ground level by means of another triggering methods, and the current wave forms and the energy of lightning discharge channel were measured. And another kinds of observation were successfully performed.(5) The total triggered lightning strikes obtained in these three years were 30 times.

为了明确周围空间电荷对输电线路雷击特性的屏蔽作用，对输电线路杆塔电晕放电电流进行了测量，并对输电线路进行了人工引雷试验。自1996年以来的三年中，实验已经在Mt.日本海附近的Okushishikui冬季雷雨云。实验在每年11月进行一个月。研究结果如下：（1）对一座60米高的试验塔的8个臂端进行了电晕放电电流测量。最大电流超过500 A，这是在害虫高度的一个臂端测量的。下层的水流比上层的水流小。(2)在雷雨云作用下，塔臂电流平均荷电量约为0.1C/h。(3)利用火箭进行了人工触发闪电实验。首先，火箭携带一个线轴，从线轴上拉出一根尼龙线，然后连接一根电线。尼龙线用来使电线与地面绝缘.尼龙绳的长度为160米。13次触发的闪电击中了输电线路和输电塔。据估计，雷击输电线路和塔是在这种空间电荷的周围空气中发生的。(4)另外，还用其它触发方法获得了17次触发闪电，并测量了闪电放电通道的电流波形和能量。另外一种观测也成功地进行了。(5)在这三年中，总共获得了30次触发雷击。

项目成果

稲葉 他: "雷放電エネルギー測定手法の開発(3)平成9年度ロケット誘雷実験における測定例" 平成10年度電気学会全国大会. (1998)

Inaba等：“雷电放电能量测量方法的开发（3）1997年火箭雷电试验的测量实例”1998年日本电气工程师学会全国会议（1998年）。

中村(正)他: "中国式限流避雷針へのロケット誘雷実験" 平成10年度電気学会全国大会. (1998)

Masaru Nakamura等人：“中国式限流避雷针的火箭闪电测试”1998年日本电气工程师学会全国会议（1998）。

宮谷 他: "誘雷エアー砲の改良(2)" 平成9年度電気設備学会東海支部大会. 135-135 (1997)

Miyatani等：“鱼雷空气炮的改进（2）”1997年电气设备工程师学会东海分会会议135-135（1997）。

中村(正): "冬季雷雲下の送電鉄塔からのコロナ放電電流" 平成9年度電気設備学会東海支部大会. (1997)

Masashi Nakamura：“冬季雷云下输电塔的电晕放电电流”1997 年日本电气工程师学会东海分会会议（1997 年）。

Koichi Nakamura 他: "DISCUSSIONS ON FINAL JUMP OF LIGHTNING STRIKES BY ROCKET-TRIGGERED APPROACH" 3rd International Workshop on Physics of Lightning. (1997)

Koichi Nakamura 等人：“关于火箭触发雷击最终跳跃的讨论”第三届闪电物理学国际研讨会（1997 年）。