Fault detection method for scattered strands in power transmission line

Abstract

The invention discloses a fault detection method for scattered strands in power transmission line. The method comprises the following steps: A) obtaining an image of an image edge; B) detecting the obtained image for a first provisional line; C) keeping all pixel points that are of the same or close to colors of a power transmission line; D) carrying out the first filtering to the interference lines in the image of an image edge for a second provisional line, and the incomplete part in the second provisional line is supplemented for a third provisional line; conducting a second filtering to the interference lines in the image of an image edge so as to finally obtain all determined lines in the image of an image edge, or rather, determined power transmission lines as well as to determine the positions of the lines; E) determining the transmission directions and the widths of the power transmission lines; judging whether there exist hidden hazards for scattered strands and fault of scattered strands in a sliding window; and G) marking the number of areas on the power transmission line where scattered strands occur. According to the method provided by the invention, it is possible to locate the areas with scattered strands more accurately and robustly. And the decision errors can be reduced as well.

Description

technical field [0001] The invention relates to a method for detecting faults of scattered strands of transmission lines, in particular to a method for detecting faults of scattered strands of transmission lines based on edge detection of fusion color information and analysis of distribution characteristics of gradient variance histograms. Background technique [0002] At present, high-voltage overhead transmission lines generally use steel-cored aluminum stranded wires. Under the joint action of huge alternating tension, bending stress caused by vibration and long-term fatigue caused by rapid temperature changes, transmission lines cause material embrittlement, and surface damage is caused by lightning strikes and electrical flashovers, which inevitably lead to high voltage. Scattered strand defects in overhead transmission lines seriously threaten the conductor itself, its power transmission and transformation equipment and personal safety. The traditional manual inspecti...

AI Technical Summary

Problems solved by technology

However, these automatic detection methods usually use simple gray-scale gradient operators such as Sobel to locate edges, and the robustness is reduced under the interference of illumination and background noise.

At the same time, when these methods adopt the judgment model of the texture slope distribution, they simply judge the faults of individual stocks by observing the positive and negative values ​​of the slopes. The instability of the value can easily lead to misjudgments, and they cannot provide a confidence measure for faults of individual stocks.

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