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Prediction method of line ice thickness based on variable grid technology to extract micro-topographic factors

A technology of ice coating thickness and prediction method, applied in prediction, neural learning method, biological neural network model, etc., can solve the problems of time-consuming extraction of micro-topographic factors, inaccurate prediction of ice coating thickness of transmission lines, etc., to improve extraction efficiency Effect

Active Publication Date: 2022-06-07
GUIZHOU POWER GRID CO LTD
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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a method for predicting line icing thickness based on variable grid technology to extract micro-topographic factors to solve the problems of time-consuming extraction of micro-topographic factors and inaccurate prediction of transmission line icing thickness

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  • Prediction method of line ice thickness based on variable grid technology to extract micro-topographic factors
  • Prediction method of line ice thickness based on variable grid technology to extract micro-topographic factors
  • Prediction method of line ice thickness based on variable grid technology to extract micro-topographic factors

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Embodiment Construction

[0056] In the present invention, the digital elevation model of the predicted area is selected from the 12.5m resolution digital elevation model of Guizhou Province. The specific implementation methods are as follows: figure 1 shown, including the following steps:

[0057] Step 1. Obtain the digital elevation model of the predicted area, and use the geographic information system software to correct the image coordinates of the digital elevation model of the predicted area;

[0058] Step 2. Obtain the vector file of the ice area distribution map in the forecast area, the historical cold wave development path, the spatial data of the power grid, the data of the icing monitoring terminal and the thickness of the icing, and preprocess the data, using the corrected digital elevation model as the coordinate system, Obtain the ice distribution map vector file, power grid spatial data and the coordinates of the icing monitoring terminal on the corrected digital elevation model;

[00...

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Abstract

The invention discloses a method for predicting the ice-covered thickness of a line based on variable grid technology to extract micro-topographic factors. Area distribution map vector file, power grid space data, ice-covered monitoring terminal data and ice-covered thickness, preprocess the data; step 3, use variable grid technology to extract the micro-topographic factor data of each monitoring terminal location; step 4, calculation step 2 The average value of the maximum ice thickness of each ice monitoring terminal in the last five ice periods; step 5, normalize the data in step 3; step 6, take the data in step 5 as the independent variable, and the data in step 4 as the dependent variable, using the neural network The network method establishes a prediction model between micro-topographic factors and line ice thickness, and solves the problems of time-consuming extraction of micro-topographic factors and inaccurate prediction of transmission line ice thickness.

Description

technical field [0001] The invention belongs to the field of icing disaster risk assessment of power transmission lines; in particular, it relates to a line icing thickness prediction method based on the extraction of micro-topographic factors based on variable grid technology. Background technique [0002] The terrain in mountainous areas is complex and changeable. Due to the influence of micro-topographic factors on local weather, there are differences in the icing levels of transmission lines in different parts of the same mountain. The icing of transmission lines in mountainous areas seriously jeopardizes the safe operation of power systems. Although the power grid company has adopted a series of measures to monitor the ice condition of the line, such as the icing monitoring system, the manual hand-held ice observation equipment, etc., the calculation method of icing thickness is often simple and cannot represent the icing situation in all micro-topographic areas, and the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06Q10/04G06Q50/06G06N3/04G06N3/08
CPCG06Q10/04G06Q50/06G06N3/084G06N3/044Y02A90/10
Inventor 吴建蓉黄欢周振峰彭赤杜昊张伟卢金科吴瑀徐朝罗世应黄军凯范强
Owner GUIZHOU POWER GRID CO LTD
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