In order to more effectively understand the difference among protection performances of the power towers in different terrains

the lightning frequency distributions on the power towers in three different terrains in the Pearl River Delta is analyzed.A statistical model of regional lightning is established to obtain lightning data.The lightning distribution of 10 years in the three terrains in the Pearl River Delta is statistically analyzed based on the lightning location system.The results show that the frequency of lightning stroke in mountain terrain is slightly higher than that in plain construction zone;though the towers in plain construction zone are protected by the near tall buildings

the number of lightning in this region is larger than the number in plain vegetation zone.The statistics indicate that the growth rate of the lightning number increases significantly in plain construction zone

but decreases in either mountain zone or plain vegetation zone.Moreover

a software for electric field simulation is used to analyze the field distributions around the towers in the three terrains

and the result verifies the reasonability of the proposed statistical method.