Method and system for mountain fire disaster assessment of railway lines without real-time collection of on-site information

Abstract

The invention discloses a line mountain fire disaster assessment method without the real-time acquisition of field information. The method comprises the steps of determining a vegetation type and a vegetation height, judging fire scene fire behavior type, obtaining alarm transmission line information, obtaining meteorological data of a mountain fire position, calculating mountain fire flame zone, ion zone and smoke zone heights, calculating flame zone breakdown voltage, calculating ion zone breakdown voltage, calculating smoke zone breakdown voltage, calculating transmission line trip probability, and evaluating a mountain fire level. The invention also provides a line mountain fire disaster assessment system without the real-time acquisition of field information. The method and the system have the advantages that a bearing body transmission line parameter, a mountain fire internal fire behavior characteristic and external environment conditions are considered, an accurate line fault probability model is established, use data is obtained based on a forestry database and a meteorological data value calculation result, the field acquisition is not needed, the probability quantitative calculation of transmission line trip caused by mountain fire is realized, the adaptability is high, and the mountain fire disaster resistance ability of a grid is improved.

Description

technical field [0001] The invention relates to the technical field of electrical engineering, in particular to a method and system for assessing line mountain fire disasters without real-time collection of on-site information. Background technique [0002] In recent years, fuels such as coal and liquefied petroleum gas have gradually replaced firewood as the main fuel, and the corridors of transmission lines have dense vegetation. Affected by the customs of villagers burning wasteland and people worshiping ancestors, large-scale mountain fires often occur in transmission line corridors. Due to the long duration of mountain fires, reclosing is difficult, and it is easy to cause multiple lines to trip and blackout at the same time, and even cause the grid to collapse. . Wildfires have become a new hot issue that seriously threatens the safe operation of large power grids and the normal power supply of society. [0003] At present, my country has carried out useful research ...

AI Technical Summary

Problems solved by technology

[0006] 1. Temporary manual collection of on-site meteorological information and vegetation information at the scene of wildfires cannot be practically applied to the calculation of the trip probability of transmission lines with many points and wide areas and uncertain locations;

[0007] 2. The existing method does not fully consider the effects of vegetation, wind and other factors on the height and temperature of the flame, as well as the particle size and concentration of smoke and dust on the tripping of wildfires, resulting in inaccurate conclusions on the calculation of tripping probability of wildfires;

[0008] 3. The existing method regards the entire wildfire gap as a uniform medium affected by temperature and smoke, which is inconsistent with the actual situation, and does not combine the actual characteristics of each voltage level for analysis

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