Observed characteristics of upward leaders that are initiated from a windmill and its lightning protection tower
Observed characteristics of upward leaders that are initiated from a windmill and its lightning protection tower
复制标题
DOI：
10.1029/2007gl032136
复制
发表时间：
2008-01
影响因子：
5.2
通讯作者：
D. Wang;N. Takagi;T. Watanabe;H. Sakurano;M. Hashimoto
中科院分区：
文献类型：
--
作者：
D. Wang;N. Takagi;T. Watanabe;H. Sakurano;M. Hashimoto
本文分析了由一个风力发电机及其避雷塔引出的14个上行先导的电场变化。我们发现，这些向上的先导可以细分为两种类型，根据它们是否被附近的闪电放电活动触发，或者它们是在没有任何附近的先前放电活动的情况下启动的。我们还获得了向上中止先导的证据，这些先导是从高接地物体启动的，以响应附近的闪电。所有这些结果都表明，一旦高接地物体周围的电场足够大，无论电场是缓慢建立还是由附近的闪电放电快速建立，都可以启动向上的先导，尽管后者似乎更有效地触发先导。此外，我们还发现，在没有附近闪电放电产生的上升电场的帮助下，与静止的风车和高度相似的塔相比，旋转的风车往往有更大的机会启动向上的先导。
We have analyzed the electric field changes of 14 upward leaders that were initiated from a windmill and its lightning protection tower. We found that these upward leaders can be sub‐classified into two types according to whether they are triggered by nearby lightning discharge activity or they are initiated without any nearby preceding discharge activities. We have also obtained evidence of upward aborted leaders that are initiated from high‐grounded objects in response to nearby lightning. All these results suggest that once the electric field which surrounds the high‐grounded object is large enough, an upward leader can be initiated no matter whether the electric field is built up slowly or created rapidly by a nearby lightning discharge, although the later appears to be more efficient in triggering the leader. In addition, we found that without the assistance of a rising electric field produced by a nearby lightning discharge, compared to a stationary windmill and a tower with a similar height, a rotating windmill tends to have a bigger chance of initiating an upward leader.