Temperature rising judgment method of composite insulator

Abstract

The invention discloses a temperature rising judgment method of a composite insulator. By the temperature rising judgment method, identification forecast can be performed on a crisp broken accident ofthe composite insulator, reliable guidance is provided for running and maintenance of the composite insulator, high-pressure experiment is performed on the composite insulator under a high-humidity or low-humidity environment, an infrared thermal image of the composite insulator is acquired, a temperature rising part of the composite insulator is judged, meanwhile, temperature rising value data of the composite insulator is acquired, the temperature rising type is judged according to the temperature rising part and the temperature rising value data of the composite insulator, the temperaturerising is smaller than or equal to 1.0K if the composite insulator is in the low-humidity environment, the temperature rising part is concentrated in a region far away from a metal fitting of the composite insulator within 20 centimeters, and the temperature rising of the composite insulator is point temperature rising; and if the composite insulator is in the high-humidity environment or the low-humidity environment, the temperature rising is larger than 1.0K, the temperature rising part extends from a high-voltage end to a low-voltage end of the composite insulator, and the temperature rising of the composite insulator is segmented temperature rising.

Description

technical field [0001] The invention relates to the field of high-voltage composite insulators, in particular to a method for judging the temperature rise of composite insulators. Background technique [0002] Composite insulators have been widely used in my country since the 1990s because of their excellent performance in polluted environments. Composite insulators are widely used in transmission lines with voltage levels of 110kV and above in China, and China has become the first country in the world to use organic external insulation as the mainstay in UHV AC and DC transmission systems. However, compared with traditional porcelain and glass insulators, composite insulators have less operating experience. In the long-term operation, some accidents or accidents have occurred, such as abnormal temperature rise for unknown reasons. These accidents or accidents are the main challenges faced by composite insulators in large-scale applications. [0003] In recent years, with ...

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Problems solved by technology

In addition, in the investigation of many domestic composite insulator rotten fracture accidents, it was found that the composite insulators had abnormal temperature rise before the rotten fracture occurred.

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