Partial Discharge Ultrasonic Signal Detection in Transformer Bushing Based on Mach-Zehnder Fiber Optic Interferometer
ID：190
Submission ID：218 View Protection：ATTENDEE
Updated Time：2021-12-03 10:46:16 Hits：379
Oral Presentation
Start Time：2021-12-16 09:30 （Asia/Shanghai）
Duration：15min
Session：[D] High voltage and insulation technology » [D3] Session 16
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Abstract
Oil-impregnated paper (OIP) bushings are widely used in the power system. In order to detect the weak signal generated by the partial discharge (PD) in bushing online, a fiber-optic ultrasonic sensing system based on Mach-Zehnder interference (MZI) was studied in this paper. The average sensitivity of the OFS is 67.3 dB (0 dB=1 V(m·s-1)). The performance test of the fiber-optic ultrasonic sensor (OFS) was carried out on a real 110 kV transformer bushing. PD signal was detected by the proposed MZI fiber-optic ultrasonic sensor, when the average discharge volume is 10.4 pC. The experimental results show that the interferometric fiber-optic ultrasonic sensing system can be used for transformer bushing PD ultrasonic signal detection. It is of great significance to improve the maintenance of the transformer bushing
Keywords
Partial discharge; ultrasonic; optical-fiber sensor; Mach-Zehnder interference; transformer bushing
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