A zero-value insulator infrared detection method

Abstract

An infrared detection method for zero-value insulators, comprising the following steps: setting the detection conditions for zero-value insulators, including the pollution degree of the insulator surface, the relative humidity of the environment, and the position of the zero-value insulators in the insulator string; then selecting the same position of each insulator in the insulator string, As an infrared detection point; use an infrared thermal imager to obtain the maximum temperature of each infrared detection point of the insulator string; make a point-by-point difference of the obtained maximum temperature data of each infrared detection point in the order from the high-voltage end to the low-voltage end, and the last one Make a difference between the data and the adjacent previous data; extract the negative value in the difference, and record the position; judge the absolute value of the negative value in the difference. The invention uses a high-precision infrared thermal imager to obtain the temperature distribution of the insulator string, and performs correlation processing on the obtained temperature distribution data to achieve the purpose of judging whether there is a zero-value insulator in the insulator string.

Description

technical field [0001] The invention relates to an infrared detection method for zero-value insulators, which belongs to the field of insulation detection of overhead power transmission lines. Background technique [0002] At present, the insulators used in my country's power network can be divided into porcelain insulators, glass insulators and composite insulators according to their insulating materials. Porcelain insulators are still used in power grid construction and operation due to their good insulation and mechanical properties and relatively low cost of use. Porcelain insulators are mostly in outdoor environments during actual operation. Due to long-term exposure to electromechanical loads, air pollution, and changes in cold and heat, the insulation and mechanical properties of the insulators will decline. The deterioration of an insulator is related to its internal structure. The materials used for porcelain parts, cement cement, steel caps and iron feet are diffe...

AI Technical Summary

Problems solved by technology

[0003] At present, the voltage distribution method, electric field method, spark gap method, sound wave and ultrasonic method, corona pulse and sensitive insulator method are mainly used for the detection of zero-value insulators, but there are deficiencies in all of them. Economical and live-detectable zero-value insulators are technical problems to be solved

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