Device and method for examining and repairing insulator contamination through combining image analysis with ultrasonic principle

Abstract

The invention discloses a device and method for examining and repairing insulator contamination through combining image analysis with ultrasonic principle. The device includes a trolley with the bottom provided with universal idler wheels and a supporting rod arranged on the trolley and rotatingly connected with the trolley; the trolley is provided with a horizontal driving mechanism for driving the supporting rod to rotate; the supporting rod is provided with an angle adjustment rod in rotary connection; the supporting rod is provided with a vertical driving mechanism for driving the angle adjusting rod to rotate; a free end of the angle adjusting rod is provided with a laser lamp, an ultrasonic sensor and a high-magnification and high-precision telescope camera. Firstly, an insulator is subjected to surface image acquisition and fault acoustic acquisition respectively; then corresponding importing, comparison analysis and fault diagnosis are carried out by an insulator contamination fault analysis system; and finally, the analysis results of the two aspects are synthesized, the reports of insulator contamination status and fault are obtained, and an insulator string with contamination is subjected to electrified cleaning examining and repairing.

Description

technical field [0001] The invention relates to the technical field of power grid insulator pollution detection equipment, in particular to a device and method for inspecting and repairing insulator pollution by image analysis combined with ultrasonic principles. Background technique [0002] Power grid anti-pollution flashover is an ancient and realistic problem. With the rapid development of my country's economy, on the one hand, the demand for electricity is increasing day by day, the voltage level of power system transmission lines is constantly increasing, the scale of the power grid is constantly expanding, and the number of AC and DC connections is increasing. On the other hand, the pollution sources in various regions are constantly increasing. Air pollution intensifies. The surface of insulators exposed to polluted conditions will deposit foul air pollution, which will lead to an increase in the coverage of unavoidable pollution flashover. The safe operation of my ...

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Problems solved by technology

However, this method is expensive and has high requirements for power supply equipment and measuring instruments.

At the same time, it is not easy to capture the timing on-site measurement, because the accumulation level of natural pollution reaches a critical state, and the meteorological conditions that cause pollution flashover cannot occur at the same time, often the pollution degree has reached a critical level, but there is no sufficient wet condition But the critical pollution flashover voltage cannot be measured

The field application of this method is limited by equipment and conditions, and it is difficult to be widely used

[0009] The above-mentioned methods have the disadvantages of being unable to conduct charged detection, unstable optical components, unable to determine the analytical expression due to complex surface characteristics, being too affected by environmental variables, expensive and not conducive to large-scale promotion and use. The shortcomings of the image ultrasonic detection device in the existing technology are that it can only carry out preliminary detection, cannot clean the dirty insulators, and cannot perform high-voltage live operation. Once the power failure occurs, the loss will be serious; more importantly, the existing technology The ultrasonic testing device needs to manually aim at the insulators in the sky, and because the handheld ultrasonic testing device is time-consuming and laborious to operate, the hand will inevitably shake, which will inevitably affect the accuracy of the ultrasonic testing device's detection results

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