Abstract
At present, GIS equipment (gas insulated switchgear) is more and more popular in power system, and the detection of GIS faults is mainly aimed at discharging faults. But more and more phenomena show that mechanical faults can not be ignored. In this paper, by analyzing a case of GIS field detection based on ultrasonic and ultrahigh frequency (UHF) detection methods, some vibration fault characteristics were analyzed. The research shows that the slight mechanical vibration signal will not cause partial discharge, so the mechanical vibration fault can not be detected by UHF detection method. But at the same time, obvious signals will be observed through ultrasonic testing, and the noise of GIS vibration is strengthened. It shows that the importance of vibration fault detection and explores a new way for GIS mechanical fault detection.
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