Abstract
With the expansion of the power grid, transmission lines across forests are increasing. Once forest fire occurs, it could threaten the transmission lines around or even cause them trip out. Therefore, studying the spread of forest fire is important. This paper presents a method based on Rothermel model and Huygens principle to analyze forest fire spread trend surrounding transmission line. Firstly, the principle of forest fire spread and the influence factors of the forest fire spread around transmission lines are analyzed. Then, based on Rothermel model and Huygens principle, the forest fires spread trends under three different conditions are simulated. By taking a transmission line of power grid in Shanxi Province as an example, the simulation is implemented and works out the average velocity and the consumed time during the forest fire spread from fire point to the transmission line under three different conditions. The result shows that the method is reasonable and valid.
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