In the context of intelligence and informationization of power system and the use of large-scale power electronic devices

the impact of lightning strokes on power system is increasing. In the current research on the characteristics of lightning strokes in power lines

the adopted models have the problem that they cannot accurately reflect the physical process of lightning strokes. Starting from the physical process of lightning strokes

a probability model centered on the area of lightning strokes is defined. On this basis

taking the electric field intensity generated in the process of lightning strokes as the starting point

the up and down models of the lightning stroke for transmission line are described

and the probability model of line lightning stroke considering the physical process of lightning strokes is established and quantitatively evaluated. The comparison between the traditional simulation method and the proposed method illustrates the feasibility and accuracy of the proposed method.