Method for detecting pollution grade of insulator

Abstract

The invention discloses a method for detecting the pollution grade of an insultor, which is characterized by comprising the steps of: 1. obtaining ultraviolet discharge pulse x1<0>, temperature valuex3<0> and humidity value x4<0>, and obtaining weather conditions; 2. determining the value of each parameter after normalization; 3. determining the constant weight value of each index factor; 4. obtaining the variable weight value of each index facor; 5. generating the membership function lists of discharge pulse and running age limit, and the membership function lists of the temperature value, the humidity value and the weather conditions; 6. generating the single factor judgement matrix A and matrix B of the index layer under intrinsic factors and enviromental factors; 7. obtaining the evaluating matrix S of the intrinsic factors; 8. obtaining the evaluating matrix Z of the enviromental facors Z; and 9. obtaining the status evaluation v of the insulator. The method has the obvious effects of: replacing the traditional method of climbing the rod for examination by workers and realizing continuous real-time detection. The method effectively conducts accurate and reliable grade analysis to the current running state of the insulator, and is convenient for monitoring and changing the insulator reasonably by the workers.

Description

Technical field [0001] The invention relates to the technical field of insulator contamination detection, in particular to an insulator contamination degree detection method based on ultraviolet sensor technology. Background technique [0002] During the operation of overhead transmission lines, various particles or bird droppings such as dust, saline, industrial smoke and dust in the air will accumulate on the outer surface of the insulator to form a dirty layer. In recent years, my country's industrial and agricultural production has developed rapidly, air pollution has intensified, and the problem of pollution flashover on transmission lines has become increasingly serious. According to statistics, in the total number of accidents in the power system, the number of pollution flashover accidents is second only to lightning damage, while the losses caused by pollution flashover accidents are 10 times that of lightning accidents. Almost all of the six major power grids in the co...

AI Technical Summary

Problems solved by technology

However, there is a lot of interference in the measurement process of the leakage current, and the leakage current is easily affected by factors such as environmental factors, shielding measures, and types of insulators.

In addition, the internal fault of the insulator can also be judged by directly detecting the discharge process before the abnormal temperature rise of the insulator through ultraviolet imaging equipment, but the ultraviolet imaging equipment is expensive and difficult to achieve online monitoring, so it has not been widely used so far

[0004] The disadvantages of the existing technology are: there is no insulator pollution detection method that can combine the inherent factors and environmental factors of the insulator, and cannot effectively analyze the current operating status of the insulator accurately and reliably. Monitoring and replacement

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