Detection method for defects of compound insulator, equipment and system

Abstract

The embodiment of the invention provides a detection method for the defects of a compound insulator, equipment and a system. The detection method comprises the following steps of: controlling a microwave source to generate high-frequency microwave, conducting the generated high-frequency microwave to a tested point on the surface of the compound insulator to be tested; acquiring reflected wave of the tested point; according to the reflected wave, and obtaining a voltage intensity signal corresponding to the tested point; judging whether the voltage intensity signal corresponding to the tested point is in the preset voltage-deviation range, and judging whether the defects exist on the tested point according to the judgment result. The detection method, the equipment and the system provided by the embodiment of the invention have the advantages that since the compound insulator adopts a non-metal material, the penetrability of the high-frequency microwave in the non-metal material is strong, surface contact and a coupling agent are not needed and non-destructive detection for the defects in the compound insulator can be realized on the basis of the reflected wave, so that the convenience and the application range of detection are improved; and since the measurement result is not dependent on the temperature, the humidity and the sunshine condition of the ambient environment, the accuracy of the detection result is improved.

Description

technical field [0001] Embodiments of the present invention relate to the field of electric power technology, and in particular, to a method, device and system for detecting defects of composite insulators. Background technique [0002] Composite insulators are more and more widely used in power systems due to their small size, light weight, excellent hydrophobicity and hydrophobic mobility, good internal insulation performance, high mechanical strength, and small corona and electromagnetic interference. There are still a small number of composite insulators that have defects and cause accidents, so it is necessary to detect the defects of composite insulators. Therefore, the detection technology of composite insulator defects has emerged as the times require. [0003] Leakage current will be generated at the defects of composite insulators, and abnormal temperature rise will occur under the action of alternating electric field. The existing infrared detection method genera...

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Problems solved by technology

[0004] The disadvantages of the above infrared detection method are: due to the temperature, humidity and sunshine of the external environment, factors such as pollution flashover, rain flashover, guano flashover and leakage current on the surface of the composite insulator will cause temperature changes of the composite insulator, thus affecting Accuracy of test results

At present, there have been a large number of cases where composite insulators have abnormal temperature rise, but dissection has not found any defects in the corresponding positions.

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