A Research on Cloud-to-Ground Lightning Statistical Methods Based on LLS

Thunderstorms are among the most damaging weather events. Selecting an appropriate statistical method based on the lightning location system is an effective way to estimate lightning parameters, and so as to propose lightning protection schemes. In this paper, theory, calculation efficiency and computational accuracy of two typical statistical methods are summarized and reviewed. The performances of these two methods in different landforms and with/without transmission line towers are compared. It is found that for a large statistical region, adopting the improved grid statistic method can improve the calculation efficiency without compromising accuracy. For regions with noticeable terrain difference, the circular domain statistic method is a better choice. Selecting 1 km as the radius of the statistical area is appropriate to fully reveal the difference of lightning parameters in different terrain, and to meet the accuracy requirements at the same time.