Research on Key Geographic Factors Affecting Lightning Tripping Based on Association Rules and Entropy Weight

Lightning is one of the important causes of transmission line tripping. In order to improve the effectiveness of transmission line risk assessment and provide reference for lightning protection design, it is necessary to study the key geographical factors affecting lightning tripping. In this paper, firstly, the geographical features such as altitude, slope, slope aspect, slope position and land type of the tower are extracted by using ArcGIS geographic software, and then the association rules are used to study the relationship between various geographical factors and lightning tripping. Finally, the entropy method is used to calculate the weight of various geographical factors on lightning tripping and determine the key factors. After calculation, the influence weight of slope on lightning tripping is 0.49, which accounts for the largest weight among geographical factors, so the influence of slope on lightning tripping should be considered in lightning protection design.