Power transmission line wildfire dynamic forecasting and early warning method based on sequential variation

Abstract

The invention belongs to the technical field of a power system and especially relates to a power transmission line wildfire dynamic forecasting and early warning method based on sequential variation. The method is characterized by, to begin with, constructing a wildfire spreading ellipse model at the initial time t0 according to wildfire point initial position F0, wind direction and wind speed and slope information, and calculating wildfire maximum spreading speed Vmax at the current time; calculating the minimum distance D0 between the F0 and a power transmission line L at the time t0 and spreading speed VL0 in the direction, and determining power transmission line wildfire early warning grade at the time t0; determining speed of the fire point F1 in the power transmission line spreading direction at the next time t1; calculating a wildfire spreading model obtained from the time t1 and after a time period delta t; repeating the steps above until obtaining a series of wildfire point positions about time series; and when receiving fire point F0 spreading and ambient environment change information at any time, updating a new wildfire spreading path diagram in time starting from the time. The method can correct wildfire spreading forecasted paths in time, and has the advantages of small calculation amount and clear target and preventing simulation in irrelevant direction.

Description

technical field [0001] The invention belongs to the technical field of power systems, and in particular relates to a method for dynamic prediction and early warning of mountain fires in power transmission lines based on time series changes. Background technique [0002] In recent years, with the rapid development of my country's power grid, the scale has continued to expand, and more and more transmission lines have crossed forest areas and mountainous areas where wildfires are frequent. Coupled with global warming in recent years, continuous high temperature and sunny weather is more and more prone to occur, as well as the impact of human industrial and agricultural production activities and tourism activities, the number of wildfire outbreaks has shown a rapid increase trend, and power accidents caused by wildfires have also increased. It seriously threatens the safe and stable operation of the power grid. Therefore, timely and accurate understanding of the positional rel...

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Problems solved by technology

[0003] At present, Chinese scholars have carried out research on the location, early warning and alarm of wildfires in power grids and achieved certain results. They have also made great achievements in the simulation of wildfire spread. No report

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