YAG:Yb crystal fiber sensor for partial discharge

Abstract

SiO2 cladding YAG:Yb crystal core fiber fabricated by the modified rod-in-tube method was demonstrated as a remote sensor for partial discharge faults (PD). The spectra of the crystal fiber and PD fault standard source were measured. When the applied voltage of the PD source is 36 kV, the detection pulse intensity of the sensor decays exponentially with the change of the distance from the PD source to the sensing probe (SSD). Its decay trend in the range of 0-25 cm conforms to the Beer-Lambert law. When the fixed SSD is 7 cm and the applied voltage range of the PD source varies from 35 to 39 kV, the pulse frequency detected by the sensor has a good linear relationship with the applied voltage (R2 = 0.99279). The experimental results indicate that the crystal optical fiber sensor can realize the remote sensing of PD monitoring.

Spatial Spectral Characteristics of Partial Discharge with Different Electrode Models

“…Xia et al developed a multi-channel photoelectric detection system that could simultaneously perform multi-spectral detection on different types of PD [19]. In our previous work, we realized the sensing and localization of PD using a fluorescent fiber that had a fluorescence spectrum that matches the PD spectrum [20][21][22]. By optimizing multi-point acquisition, we were able to improve the sensing accuracy and better realize three-dimensional space sensing [22].…”