Lightning Protection Characteristics and Optimization Measures of Coastal Mountainous High-Voltage Transmission Lines

After taking the lightning protection measures such as reducing the shielding angle of tower, strengthening the insulation level and reducing the grounding resistance, the lightning outage rate of the high voltage transmission line in the coastal mountains is still high. In order to further improve the lightning protection level of lines, this article combs the corridor characteristics of coastal mountainous transmission lines, analyses the key factors of lightning outage rate, and combines the analysis of operating lightning outage records to find out that rational configuration of line arresters can further improve the lightning protection level. Then proposes coastal Quantitative requirements for selection of arresters tower locations for mountain high-voltage transmission lines. On the premise of improving the reliability of high-voltage transmission lines, it is economical.