Because of the inadequate analysis of traditional regional lightning parameters on the existing lightning protection design procedures of HV transmission lines, during the differentiation lightning protection project of transmission lines, it is necessary to analyze the impact of lightning point distribution after the erection of transmission lines. Based on the theory of attractive volume of lightning and combined with the parameters of exiting transmission lines of the Pearl River Delta region, the statistical method of single-span corridor was established. The lightning location data of corridor area of transmission line under different terrain environment, such as the mountains, and plain terrain, were selected. The distribution of lightning activity and amplitude probability of lightning current before and after the erection of HV transmission lines was analyzed. And based on the finite element-charge simulation method, numerical calculation and simulation of the electrostatic field of lightning leader and ground was established before and after the erection of HV transmission tower. According to the principles of the development path of lightning and the strongest electric field with the same direction, the physical process of impact of distribution of ground flash caused by the erection of transmission lines was analyzed. The results show that the statistical method of single-span corridor more focuses on describing the distribution of lightning. And in the same voltage transmission line, there exists a large impact of ground flash activity in different terrain environment on the erection of transmission lines and electrical tower, and the probability of lightning point in the corridor is increased significantly. Moreover, in the same voltage transmission line, there exists a large impact of ground flash activity in mountain environment on the erection of transmission lines and electrical tower, and small changes in distribution of plain terrain and the area near river.
