Application of three-dimensional dielectric breakdown model to lightning protection system evaluation

被引：1
|
作者：
Chen Q. [1 ]
Wei G. [1 ]
Chen Y. [1 ]
Wan H. [1 ]
机构：
[1] Institute of Electrostatic and Electromagnetic Protection, Ordnance Engineering College
来源：
Qiangjiguang Yu Lizishu/High Power Laser and Particle Beams | 2011年 / 23卷 / 03期
关键词：
Cloud-to-ground lightning leaders; Dielectric breakdown model; Evaluation model; Fractal development; Resolution transform;
D O I：
10.3788/HPLPB20112303.0721
中图分类号：
学科分类号：
摘要：
To develop the evaluation methods of lightning protection system, the high resolution simulation of cloud-to-ground lightning leaders was done based on a 3-D dielectric breakdown model(DBM) in an analytic thunderstorm model, then an evaluation model was established near ground and the evaluation experiment was done. The space resolution is 50 m and the evaluation area resolution is 1 m in the experiment, which could satisfy modeling definition. Using successive overrelaxation method to solve the 3-D DBM, the trace of cloud-to-ground step lightning leaders and potential distribution in space could be gotten. When step lightning leaders arrive at the boundary of evaluation area, 2-D cubic spline method is used to transform the resolution between space and evaluation area. When leader tips approach the striking range, the unitary E-field near buildings in the evaluation area and the unitary striking probability could be gotten, and the building struck could be selected by Monte Carlo method. Thus the lightning protection system could be evaluated with statistical data of large quantities of experiments. An example was given to test the evaluation model.
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页码：721 / 726
页数：5
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