Research on Mechanism of Lightning Strike to Power Installation utilizing an Artificial Lightning Cloud.

利用3套由鼓风机和电晕充电器组成的云发生器形成的大尺度带电粒子云，研究了空间电荷云与接地物体之间的静电放电。粒子的喷射速度影响带电云的形成。在较低的速度下，带电云由于静电排斥力而扩散，而在较高的速度下，云形成细长的圆锥形状。为了在云和接地物体之间产生静电放电，在云的内部或外部设置直径为100 mm的接地球形电极。刷状泄水道的最大长度为0.55 m。放电电流具有单峰或多峰的波形，电流峰值为几安培，最大充电量为2 □C，持续时间为几微秒。检查了充电量与电流峰值或每次放电中的持续时间之间的关系。云外电极与云间放电通道较长，放电电流多峰，放电持续时间较长;云内电极与云间放电电荷量较低，放电电流为单峰。

Electrostatic discharge occurring between a space-charge cloud and a grounded object was investigated using a large-scale charged particle cloud formed by using three set of cloud generators consisting of a blower and corona charger. The ejecting velocity of the particles affects the formation of the charged cloud. At the lower velocity, the charged cloud spread due to electrostatic repulsion force, while at the higher velocity cloud forms an elongated conical shape. To cause electrostatic discharge between the cloud and a grounded object, a grounded sphere electrode with 100 mm in diameter was set at the inside or outside of the cloud. The brush-like discharge channels reached the maximum length of 0.55 m. The discharge current has a waveform with single or multi-peak, a current peak of several amperes, the maximum charge quantity of 2 □C, and the duration of several microseconds. The relationship between the charge quantity and the current peak or the duration in each discharge was examined. The discharge between the cloud and the electrode placed at the outside of the cloud has relatively longer channels and multi-peak current with the longer duration, while that at the inside of the cloud has the lower charge quantity with single peak.