Lightning warning method of transmission lines based on multi-information fusion: Analysis of summer thunderstorms in Jiangsu

At present, multi-threshold method is commonly applied in thunderstorm warning of transmission line with atmospheric electric field mill, the problem of false alarm is easily happened in application. Therefore, a multi-information fusion lightning warning method based on atmospheric electric field mill, lightning location information and lightning disaster risk assessment technology is proposed. The implementation procedure of the method is as follows: electric field intensity and the distance between the lightning and transmission line as warning factors are chose to get preliminary lightning warning level, the final lightning flashover probability is achieved by combining with lightning disaster risk assessment technology. An example of some 220 kV line is presented to describe the warning method in detail. The proposed method considers a variety of factors, can improve warning accuracy and lay the foundation for the application to the actual project in the future.