Overhead power transmission line icing risk assessment method based on GIS model

Abstract

The invention provides an overhead power transmission line icing risk assessment method based on a GIS model, and the method comprises the steps: (1) obtaining the geographic contour in a power transmission line corridor and the equipment cloud data of a tower line, generating a digital line corridor three-dimensional visualization model, and determining the line type; (2) obtaining a line icing radius; (3) obtaining the average height and the lowest sag height of each wire; (4) determining the ice coating amount of the unit sectional area of the power transmission line by using the results ofthe steps (2) and (3); (5) outputting an icing stress calculation report of the power transmission line by utilizing an ansys mechanical analysis module according to the result and line path information; and (6) determining the icing risk levels of the power transmission lines in different regions according to the icing stress calculation report and the design stress values of the corresponding equipment. The method is used for overhead line power transmission line icing risk assessment work, manpower and material resource investment of related measurement work can be greatly reduced, and meanwhile on-site real-time data can be rapidly, safely and accurately obtained.

Description

technical field [0001] The technical field of disaster prevention and mitigation of transmission lines of the present invention is specifically a GIS digital model-based icing risk assessment method for overhead transmission lines, which uses drones equipped with 3D dual cameras combined with GIS to obtain overhead transmission line corridor data, through a series of algorithms Realize real-time automatic assessment of icing risks on overhead transmission lines. Background technique [0002] In recent years, overhead transmission lines have been significantly affected by typical regional natural disasters of ice and snow, resulting in frequent tripping of lines and even accidents of broken towers, resulting in large-scale power outages and affecting the safe and stable operation of the power grid. Therefore, preventing the occurrence of typical disasters has become a key problem urgently needed to be solved on transmission lines, and how to evaluate the impact of typical dis...

AI Technical Summary

Problems solved by technology

At present, the simple evaluation method based on operation inspection information is mainly used to evaluate transmission lines. Due to the large amount of information on the status characteristics and mechanical properties of line equipment, the workload of equipment analysis and evaluation is also large, and the accuracy of evaluation results is not high. Very high, unable to truly and accurately reflect the actual state of the transmission line

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