High sensitivity detection of partial discharge acoustic emission within power transformer by sagnac fiber optic sensor

2018 ◽  
Vol 25 (6) ◽  
pp. 2313-2320 ◽  
Author(s):  
Sen Qian ◽  
Hao Chen ◽  
Yang Xu ◽  
Lei Su
Keyword(s):  
Acoustic Emission ◽  
Fiber Optic ◽  
Power Transformer ◽  
Partial Discharge ◽  
High Sensitivity ◽  
Fiber Optic Sensor ◽  
Optic Sensor ◽  
High Sensitivity Detection ◽  
Sensitivity Detection

High Sensitivity Humidity Fiber-Optic Sensor Based on All-Agar Fabry–Perot Interferometer

2018 ◽  
Vol 18 (12) ◽  
pp. 4879-4885 ◽  
Author(s):  
Bo Wang ◽  
Jiajun Tian ◽  
Ling Hu ◽  
Yong Yao
Keyword(s):  
Fiber Optic ◽  
High Sensitivity ◽  
Fiber Optic Sensor ◽  
Optic Sensor ◽  
Fabry Perot

scholarly journals High-Resolution FBG-Based Fiber-Optic Sensor with Temperature Compensation for PD Monitoring

Sensors ◽  
2019 ◽  
Vol 19 (23) ◽  
pp. 5285 ◽  
Author(s):  
Mohsen Ghorat ◽  
Gevork B. Gharehpetian ◽  
Hamid Latifi ◽  
Maryam A. Hejazi ◽  
Mehdi Bagheri
Keyword(s):  
High Resolution ◽  
Temperature Compensation ◽  
Fiber Optic ◽  
Partial Discharge ◽  
Signal Strength ◽  
Fiber Optic Sensor ◽  
Power Transformers ◽  
Wavelength Shift ◽  
Physical Parameters ◽  
Optic Sensor

This paper presented a new sensor to detect and localize partial discharge (PD) in power transformers based on a fiber Bragg grating (FBG). The fundamental characteristics of the proposed sensor, as a PD detector, were temperature compensation and direction independence. The proposed high-resolution PD detector operated based on the FBG wavelength shift. It is necessary to evaluate the physical parameters of the sensor to achieve the best results. Therefore, in this paper, the detected signal strength was investigated for different angles and temperatures. A Teflon hollow mandrel and two FBGs attached to the inner and outer surfaces of the hollow mandrel were chosen as the inner transformer PD detector. The changes in the sensor output were less than 0.4 mV and 0.5 mV for direction variations and a temperature variation of 14 °C (degrees Celsius), respectively. Consequently, the proposed sensor could be successfully employed for the detection of a transformer PD signal.

Advanced Plasmonic Fiber-Optic Sensor for High Sensitivity Measurement of Magnetic Field

2019 ◽  
Vol 19 (17) ◽  
pp. 7355-7364 ◽  
Author(s):  
Eva Rodriguez-Schwendtner ◽  
Maria-Cruz Navarrete ◽  
Natalia Diaz-Herrera ◽  
Agustin Gonzalez-Cano ◽  
Oscar Esteban
Keyword(s):  
Magnetic Field ◽  
Fiber Optic ◽  
High Sensitivity ◽  
Fiber Optic Sensor ◽  
Sensitivity Measurement ◽  
Optic Sensor
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