Method for evaluating probability of forest fire fault tripping of power transmission line

Abstract

A method for evaluating probability of forest fire fault tripping of a power transmission line is characterized by taking data with easily obtained macroscopic meteorological conditions, geographical conditions and date as input and adopting a forest fire occurrence probability model, a power transmission line fault model under the condition of forest fire and a forest fire spreading model to predict the probability of forest fire fault tripping of a power transmission line, or calculating the probability of line fault tripping after the occurrence of forest fire, and analyzing the influence degree of peripheral fire source points to the line forest fire fault, so as to achieve evaluation for the probability of forest fire fault tripping of the power transmission line, draw a grade distribution map of forest fire risky areas, make a forest fire fault pre-arranged plan of the power transmission line and disaster prevention and mitigation measures, and evaluate the forest fire occurrence probability of areas which the power transmission line passes through a fuzzy comprehensive evaluation method. The method of the present invention is mainly used for risk evaluation of forest fire fault tripping of a power transmission line and making a forest fire fault pre-arranged plan of the power transmission line and disaster prevention and mitigation measures.

Description

technical field [0001] The invention relates to a method for evaluating the tripping probability of mountain fire faults in transmission lines, and belongs to the technical field of transmission line on-line monitoring and fault risk assessment. Background technique [0002] Transmission lines passing through mountainous areas are extremely vulnerable to natural disasters such as wildfires. The reason for the fault tripping of the transmission line when the mountain fire occurs is mainly that the flame temperature, flame conductivity, ashes and smoke lead to the decrease of the gap insulation level, and the air gap breakdown flashover occurs. In recent years, the outages of transmission line faults caused by wildfires in transmission corridors have been increasing year by year. Establishing an evaluation method for evaluating the trip probability of transmission line mountain fire faults is of great significance for reducing the loss of mountain fire disasters. [0003] At...

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Problems solved by technology

[0006] It can be seen that the current research on mountain fire faults on transmission lines lacks a method for comprehensively evaluating the trip probability of mountain fire faults on transmission lines. Therefore, the basis for formulating disaster prevention and mitigation plans and post-disaster treatment measures is qualitative rather than quantitative.

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