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Line icing thickness prediction method for extracting micro-topographic factors based on variable grid technology

A technology of ice 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 thickness of transmission lines, etc.

Active Publication Date: 2020-07-17
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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  • Line icing thickness prediction method for extracting micro-topographic factors based on variable grid technology
  • Line icing thickness prediction method for extracting micro-topographic factors based on variable grid technology
  • Line icing thickness prediction method for extracting micro-topographic factors based on variable grid technology

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[0056] In the present invention, what the digital elevation model of prediction area selects is the 12.5m resolution digital elevation model of Guizhou Province, and the specific implementation method is 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 ice area distribution map in the predicted area, historical cold wave development path, power grid spatial data, ice monitoring terminal data and ice thickness, and preprocess the data, using the corrected digital elevation model as the coordinate system, Obtain the vector file of the ice area distribution map, the spatial data of the power grid and the coordinates of the ice monitoring terminal on the corrected digital elevation model;

[0059] Step 3. Use the variab...

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Abstract

The invention discloses a line icing thickness prediction method for extracting a microtopographic factor based on a variable grid technology, and the method comprises the steps: 1, obtaining a digital elevation model of a research region, and correcting an image coordinate through geographic information system software; 2, collecting an ice area distribution diagram vector file, power grid spacedata, icing monitoring terminal data and icing thickness, and preprocessing the data; 3, extracting microtopographic factor data of each monitoring terminal position by adopting a variable grid technology; 4, calculating the average value of the maximum icing thickness of each icing monitoring terminal in the last five icing periods in the step 2; 5, performing normalization processing on the datain the step 3; and 6, taking the data in the step 5 as independent variables and the data in the step 4 as dependent variables, and establishing a prediction model between the microtopography factorand the line icing thickness by adopting a neural network method, thereby solving the problems of time consumption of microtopography factor extraction and inaccurate prediction of the power transmission line icing thickness.

Description

technical field [0001] The invention belongs to the field of icing disaster risk assessment of power transmission lines, and in particular relates to a line icing thickness prediction method based on variable grid technology to extract micro-topographic factors. Background technique [0002] The terrain in mountainous areas is complex and changeable. Due to the influence of micro-topographic factors on local meteorology, 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 endangers the safe operation of power systems. Although the power grid company adopts a series of means to monitor the ice condition of the line, such as the ice monitoring system, manual ice viewing equipment, etc., the calculation method of the ice thickness is often relatively simple, which cannot represent the ice situation of all micro-topographic areas, and the special The terrain makes ...

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Application Information

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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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