Study of PD Ultrasonic Wave's Properties in Solid Medium

Abstract:

Longitudinal ultrasonic wave signals, transverse ultrasonic wave signals and other ultrasonic body wave signals generated by partial discharge are analyzed emphatically in the acoustic emission method of partial discharge detection in high voltage equipment [1-. Velocity of longitudinal ultrasonic wave is often used to calculate partial discharge defects position in the location study of partial discharge. In practical applications errors are always large. And a recent study finds that a class of plate ultrasonic guided waves will be inspired when ultrasonic body waves are transmitted from the gaseous medium to the metal medium [9-1. As the attenuation coefficient is small and the transmission distance is large when the waves propagate along the metal plate, in the partial discharge detection, ultrasonic signals detected by the ultrasonic sensor attached to the equipment enclosure include ultrasonic guided waves besides the ultrasonic body waves.

• Periodical: Advanced Materials Research (Volumes 860-863)
• Pages: 2161-2167
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.860-863.2161
• Online since: December 2013
• Authors: Wei Qiang Qi, Yan Ran Li, Xiao Xin Chen*, Da Peng Duan
• Keywords: Acoustic Emission (AE), Longitudinal Wave, Partial Discharge (PD), Transverse Wave, Ultrasonic Guided Wave

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DOI: 10.1049/ic:19980722

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