Method for detecting degradation and contamination of insulator based on MEMS-fiber micro-current sensing technology

Abstract

The invention discloses a method for detecting the degradation and the contamination of an insulator based on the MEMS-fiber micro-current sensing technology. The detection method uses a MEMS-fiber micro-current sensor to construct a detection system for contaminated and deteriorated insulators, and judges the operation state information of the insulators by detecting the micro-current characteristics of the insulator string. The specific judgment method is as follows: when the micro-current passing through the detected insulator string does not change substantially, that is, the alternating current impedance of the insulator is large and does not change substantially, then judging that the current insulator is good without the contamination and the deterioration; when the micro-current inthe detected insulator string increases, then judging that the surface of the insulator has the contamination or a degraded insulator exists in the insulator string. According to the method for detecting the degradation and the contamination of the insulator based on the MEMS-fiber micro-current sensing technology, the method realizes the non-contact measurement of the insulator string, and greatly improves the safety and the detection efficiency of the operation and the maintenance of the insulator.

Description

technical field [0001] The invention relates to the technical field of insulator detection, such as UHV DC transmission line insulator detection and UHV AC transmission line insulator detection, in particular to an insulator degradation and contamination detection method based on MEMS optical fiber micro-current sensing technology. Background technique [0002] With the rapid development of my country's economy and society, the demand for electricity continues to increase. The use of insulators on high-voltage transmission lines is also increasing. At the same time, with the acceleration of construction of UHV transmission lines, the problem of safe operation of insulators has become increasingly prominent. How to detect deteriorated and dirty insulators in time is an important issue at present. [0003] Insulators operating in overhead lines, due to long-term exposure to electromechanical loads, sun and rain, cold and heat changes, etc., will reduce the insulation performan...

AI Technical Summary

Problems solved by technology

The working principle of the above-mentioned various detection methods is to use the electrical, sound, light, heat and other signals that appear during the damage process of the receiving insulator, and in the detection method of the electrical signal, the sensor and the insulator are basically required to be in contact with the insulator. Security risks

At the same time, there are still some problems to be solved in the above detection methods, such as high detection work intensity, unsatisfactory working environment (some methods need to climb the tower), and are greatly affected by weather conditions. In addition, there are poor measurement accuracy and low detection efficiency.

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