A risk assessment and emergency decision-making method for mountain fire disasters on transmission lines

Abstract

The invention discloses a risk assessment and emergency decision-making method for forest fire disasters of a power transmission line. The risk assessment and emergency decision-making method comprises the steps of: calculating probability of field forest fire causing trip of the power transmission line through combining a power transmission line forest fire tripping mechanism, calculating load loss after trip of the power transmission line, and assessing value-at-risk of trip according to the trip probability and load loss; and then calculating field forest fire handling priority of the power transmission line according to a voltage class of the power transmission line, forest fire trip comprehensive load loss amount and forest fire trip value-at-risk, and giving an optimal decision-making scheme of configuring available resources scientifically. By adopting the method, the effect of handling the forest fire quickly and accurately according to the optimal scheme can be achieved, the method is novel in idea and is clear in process, and can provide efficient and economical technical means for handling the forest fire of the power transmission line in the field.

Description

technical field [0001] The invention belongs to the technical field of electrical engineering, and in particular relates to a risk assessment and emergency decision-making method for mountain fire disasters on power transmission lines. Background technique [0002] As the country's policy of "returning farmland to forests" becomes more and more favorable, barren mountains and wastelands are gradually covered by dense vegetation, and the vegetation near the transmission line corridor is becoming denser and denser. Extreme weather can easily lead to large-scale wildfires, which not only threaten the ecological environment and the safety of human life and property in the fire-affected area. At the same time, wildfires near the transmission corridor will cause the transmission line to trip, which seriously threatens the safe and stable operation of my country's power grid. In 2003 alone, there were 23 trips of 220kV lines in Hunan Province due to wildfires, and the total number...

AI Technical Summary

Problems solved by technology

[0004] At present, in terms of prediction and early warning, existing methods calculate the fire hazard index based on factors such as the distance from the fire point to the transmission line, the vegetation conditions at the location of the fire point, the terrain at the location of the fire point, and the area index of the fire area. The probability of mountain fire tripping of transmission lines and the risk value after tripping of transmission lines are not considered in combination with the mechanism of mountain fire tripping of transmission lines

Therefore, the fire hazard index cannot accurately assess the risk of wildfires to transmission lines

In terms of emergency decision-making, the existing method is to take measures such as no treatment, close monitoring, small computer fire extinguishing, and large fire extinguishing platform fire extinguishing for mountain fires according to the fire hazard level, without scientifically calculating how to allocate existing resources to achieve the best fire extinguishing Effect, when a large-scale wildfire occurs, the best effect of reducing power grid losses cannot be achieved

Based on the above two points, it can be seen that there is a large deviation between the prediction, early warning and emergency decision-making of transmission line mountain fire tripping and the actual situation.

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