All-fiber interferometric sensor of 150kHz acoustic emission for the detection of partial discharges within power transformers

Posada, Julio E.; Rubio-Serrano, Jesus; García-Souto, José A.

doi:10.1117/12.885511

Cited by 8 publications

(2 citation statements)

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“…Acoustic FOS for PD detection in oil insulated transformers have been described that are based on membrane extrinsic Fabry-Perot interferometers 5,6 , or fibre-optic coil hydrophones 7,8 . FOS-based acoustic PD detection in silicone rubber cable accessories has received much less attention so far.…”

Section: Introductionmentioning

confidence: 99%

All fibre-optic simultaneous detection of optical and acoustic emission from partial discharges in silicone elastomer

et al. 2012

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In high-voltage facilities of power stations and transmission networks, discharge activities leading to catastrophic failure can occur. Early detection of partial discharges (PD) in polymeric insulations of HV cable terminations and joints is therefore increasingly important. This paper describes a monitoring methodology to detect PD activity in silicone elastomer by two independent fibre-optic sensor types. Fluorescent fibre-based sensors are sensitive to plasma optical emission already at the onset of PD while an acoustic fibre-optic sensor responds to acoustic emission from the PD during its progression. The sensitivities of both sensor types are compared, and it is demonstrated that they provide complementary information for fibre-optic sensor-based monitoring of high-voltage cable accessories.

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Section: Introductionmentioning

confidence: 99%

All fibre-optic simultaneous detection of optical and acoustic emission from partial discharges in silicone elastomer

et al. 2012

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“…As a counter case, the Sagnac interferometric sensor shows its superior stability against environmental temperature influences, due to its truly path-matched interference mode. Beside this, the Sagnac interferometric sensor also has high sensitivity and excellent high-frequency response to ultrasonic wave signals, which render it suitable, particularly for PD acoustic sensing [ 5 , 16 , 19 ].…”

Section: Introductionmentioning

confidence: 99%

A Fiber Optic PD Sensor Using a Balanced Sagnac Interferometer and an EDFA-Based DOP Tunable Fiber Ring Laser

Wang

Fang

et al. 2014

Sensors

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A novel fiber-optic acoustic sensor using an erbium-doped fiber amplifier (EDFA)-based fiber ring laser and a balanced Sagnac interferometer for acoustic sensing of the partial discharge (PD) in power transformers is proposed and demonstrated. As a technical background, an experimental investigation on how the variations of the fiber birefringence affect the sensor performances was carried out, and the results are discussed. The operation principles are described, and the relevant formulas are derived. The analytical results show that an EDFA-based fiber ring laser operating in chaotic mode can provide a degree of polarization (DOP) tunable light beam for effectively suppressing polarization fading noises. The balanced Sagnac interferometer can eliminate command intensity noises and enhance the signal-to-noise ratio (SNR). Furthermore, it inherently operates at the quadrature point of the response curve without any active stabilizations. Several experiments are conducted for evaluating the performances of the sensor system, as well as for investigating the ability of the detection of high-frequency acoustic emission signals. The experimental results demonstrate that the DOP of the laser beam can be continuously tuned from 0.2% to 100%, and the power fluctuation in the whole DOP tuning range is less than 0.05 dBm. A high-frequency response up to 300 kHz is reached, and the high sensing sensitivity for detections of weak corona discharges, as well as partial discharges also is verified.

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Difference Between FBG and PZT Acoustic Emission Sensor

Dong

Peng

Cheng-gui

2019

Springer Proceedings in Physics

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All-fiber interferometric sensor of 150kHz acoustic emission for the detection of partial discharges within power transformers

Cited by 8 publications

References 0 publications

All fibre-optic simultaneous detection of optical and acoustic emission from partial discharges in silicone elastomer

All fibre-optic simultaneous detection of optical and acoustic emission from partial discharges in silicone elastomer

A Fiber Optic PD Sensor Using a Balanced Sagnac Interferometer and an EDFA-Based DOP Tunable Fiber Ring Laser

Difference Between FBG and PZT Acoustic Emission Sensor

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