Method for evaluating forest fire spreading risk of power transmission channel

Abstract

The invention provides a method for evaluating the forest fire spreading risk of a power transmission channel. The method for evaluating the forest fire spreading risk of the power transmission channel is characterized by comprising the following steps that S101, a remote sensing image is preprocessed; S102, fire points and obstruction objective image elements are extracted based on the corrected remote sensing image; S103, fire outbreak point calculation is carried out; S104, the forest fire spreading speed is calculated; S105, burning range estimation is performed within predefined time duration; S106, a power transmission tower set affected by a fire is searched; S107, the forest fire spreading risk of the power transmission channel is evaluated. By the adoption of the method, various data of the wind speed and direction, the topographic slope, the vegetation type, ground barriers and the like are collected, so that a calculation method including forest fire spreading conditions and relevant factors for causing power transmission line tripping by the fire is established, hence, evaluating calculation of the forest fire spreading risk of the power transmission channel is achieved, and the national economy loss caused by large-area outage of a power grid can be effectively prevented and reduced.

Description

technical field [0001] The invention relates to the technical field of electric power system and automation, in particular to a method for assessing the risk of forest fire spread in power transmission channels. Background technique [0002] With the continuous deepening of the intelligent development of the State Grid, the large-scale construction of the UHV transmission network, and the large-scale and high-efficiency power grid marked by large-scale networking and large-capacity encounter disasters, which will have a fast impact and a wide range. socialization trends. Forest fire is one of the main factors causing power grid disasters. The situation of forest fire prevention in the power grid is becoming more and more serious. It is necessary to carry out comprehensive fire prevention in the power grid from various aspects in order to truly control the damage of forest fires to the power grid and effectively improve the level of safe operation of the power grid. In the ...

AI Technical Summary

Problems solved by technology

In the prior art, predictive analysis and calculation of forest fire behavior changes and forest fire spread trends are carried out only based on two types of parameters, wind direction and humidity, or predictive analysis and calculation of the shape of forest fire burning zones are performed only based on two types of parameters, terrain conditions and wind conditions. However, the influence of terrain around the fire point, flammability of vegetation, and forest fire spread barriers such as rivers or roads on the forest fire spread trend or spread path is ignored, and the existing technology only uses the forest fire spread range as the power grid loss risk assessment parameter , does not involve the relationship between flame height and forest fire intensity and triggering line tripping, but forest fire burning is an important condition for causing line tripping, but it is not a sufficient condition. It needs to be combined with other conditions to obtain the tripping risk level

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