Wildfire Risk Assessment to Overhead Transmission-Line Based on Improved Analytic Hierarchy Process

The occurrence of wildfire disasters can easily trigger tripping in overhead transmission-line, thereby posing a significant threat to the safe and stable operation of the power system. In order to enhance the wildfire prevention and control capability of overhead transmission-line, a wildfire risk assessment method based on the improved analytic hierarchy process (AHP) is proposed. First, the main factors of wildfire occurrence are explored, and the wildfire risk indicator system for overhead transmission-line is constructed. We propose a novel runaway coefficient of fire for assessing the impact of fire sources on wildfire disaster. Secondly, the mutual information method is used to avoid the subjective arbitrariness of AHP to improve the reliability of each index weight. The results show that about 82.14% of new fire events of 2023 in Fujian (China) are located in medium-, high-, and very-high-risk areas, demonstrating the effectiveness of the proposed method. This methodology offers a foundation for the power system to mitigate the risk of wildfire.