Atmospheric pressure plasma shield for protecting wind power generator from lightning stokes

用于保护风力发电机免受雷击的大气压等离子体屏蔽

基本信息

批准号：
16360133
负责人：
YASUOKA Koichi
金额：
$ 9.79万
依托单位：
Tokyo Institute of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2004
资助国家：
日本
起止时间：
2004 至 2005
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-16360133/
关键词：
lightning stroke windmill blade space charge surface charge insulator lightning impulse water film インパルス電圧発生装置大気圧プラズマ波長可変パルスレーザ 2次元光学観測

项目摘要

With increase in number of wind power generators, the lightning damage on the windmill blade becomes a serious problem. Although many types of lightning protection methods such as a lightning rod and a tower with rod, a grounded metal receptor embedded in a tip of the blade have been installed to reduce the lighting damage but have not sufficient effect. In this study, more active protection method using space charge around the blade or water film covered on the surface has been proposed and examined by applying lightning impulse voltage to the small blade models. The following results are obtained using lightning impulse voltage having 200-300 kV peak values.The surface of model insulator was charged by the ion wind generated by the wire corona discharge. It was found that the electric discharge channel was formed away from the surface when the polarity of the accumulated charge on the insulator was same as the applied voltage polarity, while the discharge extended around the insulator with opposite polarity. 50% flashover voltage increased when the space charge that voltage polarity was same to the impulse voltage, while decreased when the polarity reversed.In addition to the surface and space charge effect from the view point of the lightning protection, another method was developed using water films covering the surface of the dielectric materials. The discharge developed on the surface of the water when the conductivity of the water was smaller than one micro S/cm. In this case, the water breakdown was not observed at least over 0.25 mm thickness of water film. But with thinner and higher conductivity water film, the discharge current flowed in the water directly and the surface discharge was not expanded around the breakdown point.

随着风力发电机的数量增加，风车刀片上的闪电损坏成为一个严重的问题。尽管已安装了许多类型的避雷针方法，例如避雷针和带有杆的塔，但已安装了嵌入刀片尖端的接地金属受体，以减少照明损伤，但没有足够的效果。在这项研究中，已经提出并检查了使用闪电脉冲电压在小刀片模型上施加闪电脉冲电压，并检查了使用叶片周围的空间电荷或表面覆盖的水膜周围的空间电荷的更积极的保护方法。使用具有200-300 kV峰值的闪电脉冲电压获得以下结果。模型绝缘子的表面是由电线电晕放电产生的离子风充电。发现当绝缘子上的累积电荷的极性与施加的电压极性相同时，电气排放通道是从表面上形成的，而放电则以相反的极性围绕绝缘体延伸。当电压极性与脉冲电压相同时，闪光灯电压增加了50％的闪光电压，而在极性反转时降低。除了从闪电保护的角度来看，除了表面和空间电荷效应，使用水的另一种方法是开发的覆盖介电材料表面的膜。当水的电导率小于一个微s/cm时，在水面出现了排放。在这种情况下，没有观察到至少超过0.25毫米的水膜的水分。但是，随着电导率较薄，更高的电效水膜，排放电流直接在水中流动，表面排放并未在分解点附近扩展。

项目成果

期刊论文数量（3）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Water Film for Protecting Insulator Surface From Lightning Discharge

保护绝缘子表面免受雷击放电的水膜

DOI：
发表时间：
2006
期刊：
33rd IEEE International Conference on Plasma Science 2P19
影响因子：
0
作者：
Koichi Yasuoka;Naoki Nakagomi;Shozo Ishii
通讯作者：
Shozo Ishii

Decomposition of organic matter in water by atmospheric barrier discharge

大气屏障放电分解水中有机物

DOI：
发表时间：
2006
期刊：
The Papers of Technical Meeting on Plasma Science and Technology, IEE Japan PST-06-9
影响因子：
0
作者：
Takashi Yamaguchi;Koichi Yasuoka;Shozo Ishii
通讯作者：
Shozo Ishii

Water Film for Protecting Insulator Surgace From Lightning Discharge

保护绝缘子表面免受雷击放电的水膜