Wildfires are dispersed over a broad and trips caused by wildfires impacted by many factors

which pose serious threat the safety and stability of the power grids. The effects of factors like anthrop

meteorological condition

and vegetation type on wildfire distribution were analyzed. The influences of topography

transmission line parameters

and wildfire morphological features on the wildfire withstand level of electric transmission line were expounded. Then differentiations of wildfire vulnerability for transmission lines were analyzed. By combining mean time with restoration of transmission line trips

the quantitative and refined indicators of wildfire risk for transmission line and its calculation method are proposed. The feasibility and effectiveness of wildfire prevention measures for transmission lines are researched from the perspective of both disaster prevention and control. The results show that calculations of quantitative risk analysis of wildfire disaster of each tower segment revealed the differentiation of risk characteristics. A ±500 k V DC transmission line in Hunan provincial power grid was taken as example. The quantitative risk analysis of wildfire disaster for the 1 300-1 577 segment were analyzed

which reflected actual distribution law of the risk of wildfire trips and disaster response capacity of transmission lines. The targeting control measures such as vegetation replacement

fire-fighting equipment configuration

distributed fire monitoring devices installation and so on were pursued for the four important sections.It is shown that the proposed method and indexes are valid and superior. Study of differentiation technology and strategy of wildfire protection for transmission lines can be used to provide refined and targeted information for the transmission line planning and operation maintenance and improve the efficiency of the prevention of wildfire.