Abstract: Aiming at the potential safety hazards of wildland fire induced by overhead distribution lines in forest areas and the serious consequences of fire, a risk assessment method of wildland fire induced by 10 kV overhead distribution lines in forest areas is proposed. Firstly, the indicator system of wildland fire risk assessment caused by 10 kV overhead distribution lines is established and the indicator weights are determined. The score coefficient of fire occurrence probability indicator is determined based on the penalty variable weight which emphasizes the influence of low score assessment unit. Fuzzy comprehensive evaluation method is used to obtain the membership degree of consequence grade. Finally, the risk assessment results are obtained by the fire risk map. Take the 10 kV Tangxi 113 line as an example, the fire occurrence probability of this line is higher, and the score is 69.805 points. Membership degree of the fire consequences as minor, general, medium, serious and catastrophic are 65.8%, 8.1%, 12.3%, 2% and 11.8%, respectively. The fire risk map is draw, and the membership degree of low, medium and high risk of the line are 65.8%, 22.4% and 11.8%, respectively. Effective rectification measures on the incomplete indicators are suggested, including ensuring that the vertical and horizontal distance between the distribution line and the tree barrier meets the standards, and replacing the wires and cables with insulated conductors.

Key words: risk assessment, wildland fire, fuzzy comprehensive evaluation, penalty variable weight