An early warning method for transmission line wildfire spread combined with public network meteorology

Abstract

The invention provides a transmission line mountain fire spread warning method with the combination of public network weather. The method comprises a step of obtaining a fire point coordinate, a step of calculating the spread speed of a fire point spread direction based on the fire point coordinate, a step of calculating the linear position of the fire point in the spread direction after a spread time according to the spread speed, and obtaining a spread coordinate, a step of calculating the spread area of the fire point according to the spread coordinate, a step of carrying out warning level definition on the transmission line in the spread area according to the spread time and issuing warning. According to the method, an effective information support is provided for the judgment of a grid mountain fire disaster by a power department, the mountain fire spread speed from the fire point to the transmission line can be calculated, the warning level of the transmission line is judged through time according to the mountain fire spread speed, and the method has high accuracy and practicability and plays an important role in maintaining security and stability of a grid and reducing a disaster loss.

Description

technical field [0001] The invention relates to the technical field of power systems, in particular to a method for early warning of wildfire spread on transmission lines combined with public network weather. Background technique [0002] At present, the power grid has become an important foundation and guarantee for the development of modern society and economic progress. The modern power grid marked by large power grid and large capacity has achieved large-scale and high efficiency. In order to reduce and prevent the safe and stable operation of the power grid from the threat of wildfires, and prevent the occurrence of transmission line trip accidents caused by wildfires, experts at home and abroad have carried out a lot of research on the spread of wildfires. The main international wildfire spread models include the Rothermel model of the United States, the McArthur model of Australia, the national forest fire spread model of Canada (G.L.W.Perry, 1998), and the combined m...

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Problems solved by technology

However, the above studies on the spread of wildfires still cannot meet the needs of power grid security. The main problems are as follows:

[0003] 1) Since wildfires are extremely harmful to the power grid, more and more power companies have begun to realize the importance of wildfire monitoring and have begun to monitor fires around transmission lines. However, wildfires are not static. Affected by meteorological conditions, geographical factors, vegetation and other factors, the speed of wildfires will vary greatly, especially the factors of wind force and wind direction, which may cause the spread speed to vary from tens of meters to several kilometers per hour

The trend of wildfire spread and the degree of danger to transmission lines cannot be accurately judged only by monitoring the fire point

[0004] 2) Although there have been a lot of research on the analysis of wildfires and forest fire spread at home and abroad, the previous analysis of wildfire spread is aimed at the wildfire itself and lacks pertinence to transmission lines

[0005] 3) At present, the analysis of mountain fires on transmission lines is mainly based on simple conditions, and the spatial distance is used as the evaluation standard for the early warning level of transmission lines. The speed and time of mountain fires reaching transmission lines are not calculated. It is very important for the department to take countermeasures. The accuracy and credibility of the previous judgment methods are low, which cannot meet the needs of the power sector to prevent transmission line damage caused by wildfires.

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