Power transmission line icing growth forecasting method based on atmospheric numerical model

Abstract

The invention provides a power transmission line icing growth forecasting method based on an atmospheric numerical model. The power transmission line icing growth forecasting method comprises the steps of: utilizing WRF to obtain data including near-surface wind speed Vi and near-surface temperature Ti of a forecasting region, rainfall Ri within a forecasting time period, terrain height H and wind direction alpha of a power transmission line at each moment; and calculating to obtain icing increment delta Li of the line section at the corresponding moment according to a formula. By adopting the power transmission line icing growth forecasting method, the line icing growth trend can be forecasted accurately; the operability is high and data sources are rich; the forecasting accuracy is high, refined icing numerical forecasting can be made for different microtopographic regions, and resolution can be adjusted according to microtopographic size and microtopographic scope; and the power transmission line icing growth forecasting method can be used for instructing power transmission line operating personnel to perform power grid ice melting and removing operations accurately, ensuring safe and stable operation of the power grid, effectively increasing ice removing efficiency, optimizing resource allocation, and reducing the loss of the power transmission line caused by ice disaster of the power grid.

Description

technical field [0001] The invention belongs to the technical field of power transmission and distribution, and in particular relates to a method for predicting the growth of ice coating on power transmission lines. Background technique [0002] As an important part of a large and complex lifeline system, the safety of the power system directly affects the production and construction of the country and the people's living order. According to statistics, in addition to operating equipment failures and human error, most of the failures of the power system are caused by natural disasters. Among them, the ice disaster of the transmission line is one of the important disasters that threaten the safe operation of the power grid. Therefore, forecasting the growth of transmission line icing can realize the early response to grid icing, effectively reduce the occurrence of tower collapse accidents and tripping accidents, improve the ability of the grid to resist freezing rain and sn...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is: Aiming at the present situation that the grid accuracy of the short-term prediction of grid icing is not high and the prediction results are too rough, a method for forecasting the growth of transmission line icing based on the atmospheric numerical model-WRF (WeatherResearchForecast) is proposed , using this method, the prediction results of the atmospheric numerical model can be used to provide a refined prediction of the growth of grid icing

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