Multi-means-integrated charged detection system for combined electric appliance

Abstract

The invention relates to a multi-means-integrated charged detection system for a combined electric appliance. The multi-means-integrated charged detection system is technically characterized in that the system comprises an ultrasonic detection unit, a high-frequency detection unit, an ultrahigh-frequency detection unit and a high-speed oscilloscope. The ultrasonic detection unit, the high-frequency detection unit and the ultrahigh-frequency detection unit are arranged on the combined electric appliance, detect corresponding signals respectively and send the detected results to the high-speed oscilloscope. The high-speed oscilloscope finds out various partial discharge defects in the combined electric appliance by detecting and analyzing three partial signals of super-high frequency, high frequency and ultrasonic wave through built-in comprehensive partial discharge analysis and diagnosis software. By means of the multi-means-integrated charged detection system, various partial discharge defects in the combined electric appliance can be effectively detected, the accuracy and reliability of the detection result are improved, and the multi-means-integrated charged detection system has the advantages of being simple in structure, high in sensitivity, convenient to implement and the like and meets the actual application requirement for field detection.

Description

technical field [0001] The invention belongs to the technical field of power grid combined electrical appliances, in particular to a live detection system integrating multiple means of combined electrical appliances. Background technique [0002] Gas-insulated switchgear (GIS) has many advantages such as maintenance-free and space-saving, and has been widely used in power grids. However, in recent years, accidents of combined electrical appliances have occurred frequently, especially the surface discharge defects of basin insulators inside combined electrical appliances are particularly prominent. It can be seen from the high-voltage theory that the breakdown voltage of creeping discharge or even flashover is much lower than the breakdown voltage of sulfur hexafluoride gas. The pot insulator is the place with the worst internal insulation performance of the combined electrical appliance. At present, ultrasonic testing methods or ultra-sonic testing methods are mainly used. ...

AI Technical Summary

Problems solved by technology

However, in recent years, accidents of combined electrical appliances have occurred frequently, especially the surface discharge defect of the pot insulator inside the combined electrical appliance is particularly prominent

It can be seen from the high-voltage theory that the breakdown voltage of creeping discharge or even flashover is much lower than the breakdown voltage of sulfur hexafluoride gas. The pot insulator is the place with the worst internal insulation performance of the combined electrical appliance. At present, ultrasonic testing methods or ultra-sonic testing methods are mainly used. The high-frequency detection method is used for ultrasonic partial discharge detection of combined electrical appliances. Since the defects of pot insulators cannot be detected by a single detection method, and it is easily disturbed by the external environment, the detection accuracy is low, and it is difficult to find various partial discharge defects inside the combined electrical appliance.

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