Power transmission equipment fault diagnosis method

Abstract

The invention discloses a power transmission equipment fault diagnosis method. The method comprises the following steps: A) establishing a normal image database of power transmission network equipment, wherein the power transmission network equipment comprises power transmission lines, fittings and insulators; B) collecting operation images of the power transmission network equipment, and carrying out pretreatment and image feature extraction on the collected operation images of the power transmission network equipment; and C) through an image comparison module, by utilizing the collected operation images of the power transmission network equipment and images in the normal image database of the power transmission network equipment, analyzing change and defect characteristics of the power transmission network equipment in the operation images of the power transmission network equipment, and image difference in the normal image database of the power transmission network equipment under normal state of the equipment, and carrying out fault identification and diagnosis on the power transmission equipment. The method can find possible fault hidden trouble of the power transmission lines in time through a structure template analysis and defect feature pattern matching combined method, thereby greatly reducing fault judgment error.

Description

technical field [0001] The invention relates to a fault diagnosis method for power transmission equipment, in particular to a fault diagnosis method for power transmission equipment based on structural template analysis and defect characteristic pattern matching. Background technique [0002] 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. [0003] Incidents of potential safety hazards in power grids have occurred from time to time in various places due to so...

AI Technical Summary

Problems solved by technology

[0006] However, the problem with this type of detection method is that: on the one hand, using simple grayscale gradient operators such as sobel to locate edges, the robustness is reduced under the interference of light and background noise

On the other hand, when the judgment model of texture slope distribution is used, the equipment fault is judged simply by observing the positive and negative values ​​of the slope. The instability of the value can easily lead to misjudgment, and it cannot provide a confidence measure of the fault.

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