An optical measurement method for nanosecond impulse signal monitoring of partial discharge based on the Fabry–Perot interferometer sensing system

Abstract

Partial discharge (PD) detection in high voltage power equipment is significant as it provides most early information on the degradation characteristics. A fiber optic Fabry-Perot (F-P) sensor based on charge-coupled probe is designed to detect PD signals under pulse square voltage. When the PD signal acts on the probe, the potential difference induced by the probe leads to the deformation of the piezoelectric diaphragm, which further results in the change of light intensity signal. Thus, PD detection could be realized by converting the light intensity signal into a voltage signal. In this study, the discharge impulse signal under various voltage frequencies (50 Hz, 5 kHz, 10 kHz) have been monitored by the F-P sensor and the ultrahigh frequency (UHF) antenna. Compared with the UHF antenna, the average measured magnitude of PD signals detected by the F-P sensor is increased by 23.1%.

Distributed Partial Discharge Locating and Detecting Scheme Based on Optical Fiber Rayleigh Backscattering Light Interference

“…At present, there are mainly three types of optical fiber partial discharge sensors: Fabry-Perot sensors (F-P) [ 6 ], fiber Bragg grating sensors (FBG) [ 7 , 8 ], and intrinsic interferometer sensors [ 9 ]. These types of sensors have different sensing properties in terms of sensitivity and frequency response due to their different structures, which have different applicability.…”

A passive optical fibre sensor based on Fabry‐Perot interferometry for bipolar electrostatic monitoring of insulating dielectrics

“…In recent years, extensive studies have been conducted on the optical fibre sensors based on the principle of Fabry-Perot (F-P) interference in the partial discharge detection of the transformer due to their merits of high sensitivity, high accuracy, high signal-to-noise ratio [14][15][16][17][18][19][20] etc. Meanwhile, the development of advanced functional materials enables the development of the sensor for higher performance [21].…”