Porcelain suspension type insulator fault diagnosis method

Abstract

The invention relates to a porcelain suspension type insulator fault diagnosis method. The method can realize the diagnosis of a faulty insulator by analyzing the temperature feature information of a porcelain suspension type insulator string. When the method is used for implementing diagnosis, the infrared thermal image spectrum of a certain number of the same types of insulator strings having no obvious abnormality can be collected on a to-be-detected site, so as to form the reference temperature feature information of the type insulator string of the detection site. Then the temperature feature information in the infrared thermal imaging spectrum of the to-be-diagnosed insulator string is extracted to compare with the reference temperature feature information, and the faulty insulator can be judged when no obvious difference exists. According to the porcelain suspension type insulator fault diagnosis method, the influence of the environment interference factor on the temperature feature of the insulator string can be eliminated, and the insulator fault diagnosis accuracy of the infrared thermal imaging method can be effectively improved. The porcelain suspension type insulator fault diagnosis method considers the difference of temperature feature difference of insulators at different positions, can realize diagnosis by comparing the temperature features of the same position of the similar equipment in the identical environment, and is applicable to the insulator fault diagnosis under various complicated conditions. The porcelain suspension type insulator fault diagnosis method can be conveniently applied on site.

Description

technical field [0001] The invention relates to an insulator defect diagnosis method, which belongs to the technical field of operation, maintenance and repair of high-voltage power transmission and transformation equipment. Background technique [0002] Porcelain suspension insulators (hereinafter referred to as insulators) are the main insulating parts in the power grid and also play the role of mechanical support. Insulators in operation have been working for a long time in a complex environment where strong electric fields, mechanical stress, pollution and harsh weather coexist. As the running time increases, the insulation performance and mechanical properties of the insulator will gradually decrease due to the combination of electromechanical effects, resulting in low-value insulators (insulator resistance between 10 megohm and 500 megohm) or zero-value insulators (insulator resistance less than 10 megohms). Zero or low value insulators are collectively referred to...

AI Technical Summary

Problems solved by technology

The actual situation is that due to environmental factors, surface pollution and other factors, the temperature difference between low and zero value insulators and normal insulators is often less than 1K, so it is impossible to distinguish

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