Study on lightning parameters of transmission line porch based on lighting location system

Abstract

The cause of lightning accident of transmission line is due to characteristics of lightning data, so it is very important to count and study the characteristics of lightning parameters. The monitoring method of lightning location system has substituted for the traditional method of collecting lightning data. With the new method, more lightning parameters can be detected, such as the lightning striking location, intensity, strike back times and intensity effectively. In the paper, the analysis model of lightning data based on Arcgis has been established. The data of Pearl River Delta area has been selected to classified and analyzed from 1999~2007. The result of analysis can provide basic data for the lightning proof of HV transmission line, and valuable references to improve the lightning-shielding level of a transmission line and decrease the impact of lightning on the safe operation of power systems. In order to verify the feasibility of the model, we had contrasted the lightning density with different topography of a 220kV transmission line. Besides that, the structure of line and the design of insulation had considered, and to compare multi-segment lines with the same landscape through data analysis to find out which is the main factor causing the different lightning density. According to these differences to draft corresponding solutions and improve the lightning proof of transmission line. It is noted that the lightning protection level of transmission line is not only correlated with the design of lightning-proof, but also with lightning activity data based on LLS. It is needed to pay attention to lightning activity data analysis, design of lightning-proof, structure of transmission tower, and insulation co-ordination. Finally, make a reasonable decision for lightning proof.