Partial discharge acoustic emission detector using mandrel-connected fiber Bragg grating sensor

Ghorat, Mohsen; Gharehpetian, Gevork B.; Latifi, Hamid; Hejazi, Maryam A.; Layeghi, Azam

doi:10.1117/1.oe.57.7.074107

Cited by 15 publications

(9 citation statements)

References 44 publications

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“…Another setup was implemented by one FBG and a tunable laser [21]. The tunable laser generates a narrow spectral bandwidth whose wavelengths can be tuned according to the FBG.…”

Section: Methodsmentioning

confidence: 99%

“…The minimum received sensitivity was –113 dB; therefore, the sensor could detect at least 35 Pa at 225.5 kHz. The best resolution for the sensor, which consists of one FBG [21], was 75 Pa in this method.…”

Section: Pressure Testmentioning

confidence: 99%

“…FBG could be designed in specific applications by developing the technology. FBG is attached to Mandrel and cantilever with special glue to sense mechanical waves [20,21]. Michelson and Sagnac interferometers [22,23,24] and different types of fiber, such as multimode fiber and a long-period grating (LPG) [16,17,25,26], have also been used to detect PD signals.…”

Section: Introductionmentioning

confidence: 99%

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

Ghorat

Gharehpetian

Latifi

et al. 2019

Sensors

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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.

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“…Another setup was implemented by one FBG and a tunable laser [21]. The tunable laser generates a narrow spectral bandwidth whose wavelengths can be tuned according to the FBG.…”

Section: Methodsmentioning

confidence: 99%

Section: Pressure Testmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

Ghorat

Gharehpetian

Latifi

et al. 2019

Sensors

Self Cite

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“…Distributed optical fiber acoustic sensing has the characteristics of high sensitivity, large dynamic range and simple structure. It is widely used in oil and gas pipeline monitoring [6], peripheral safety [7], structural health monitoring [8] and other fields, and has broad application prospects and commercial value. In the third chapter, the optical fiber acoustic sensing systems based on interference sensing technology and backscattering technology are introduced.…”

Section: Introductionmentioning

confidence: 99%

A Comprehensive Study of Optical Fiber Acoustic Sensing

et al. 2019

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The optical fiber acoustic sensing system is suitable for long-distance monitoring of the acoustic signals generated by the external disturbances. According to the continuity of sensing units, quasi-distributed and distributed optical fiber acoustic sensing technologies are differentiated to meet different application requirements. On the one hand, the recent progress of Fabry-Perot interferometer (FPI) focusing on the diaphragm material, and the research hotspots in the field of the continuous Fiber Bragg grating (FBG) array are firstly reviewed. On the other hand, Mach-Zehnder interferometry (MZI), Michelson interferometry (MI), and Sagnac interferometry (SI) have rapidly developed in the aspect of the demodulation algorithm optimization with the purpose of the sensing performance improvement. Moreover, the current primary research works of the phase-sensitive optical time-domain reflectometer (ϕ-OTDR) are the signalto-noise ratio improvement and the mixed optical structure design. Finally, this paper presents an overview of the recent advances of optical fiber acoustic sensing system in the application domains of military defense, structural health monitoring, petroleum exploration, and development. INDEX TERMS Acoustic detection, distributed acoustic sensing, optical fiber sensing, ϕ-OTDR, structural health monitoring.

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“…Fiber Bragg grating (FBG) sensors has stood out as a flexible and particularly suitable tool for power transformer monitoring. Many studies were published describing FBG as a partial discharge [5,6,7,8,9,10,11], gas [12,13] and for a temperature sensor [14,15,16,17] in power transformers. However, there are few studies for deformation or pressure FBG sensors.…”

Section: Introductionmentioning

confidence: 99%

Static and Dynamic Evaluation of a Winding Deformation FBG Sensor for Power Transformer Applications

Melo¹,

Benetti²,

Lacerda

et al. 2019

Sensors

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Power transformer is the most important and expensive equipment used in the electric power industry. Fiber Bragg grating (FBG) sensors has stood out as a flexible and particularly suitable tool for power transformer monitoring being a passive and dielectric sensor element. In this work we evaluated the performance of FBG pressure sensors developed to monitor the static and dynamic pressure in high voltage winding transformers during events such as short-circuit and inrush current. Two types of sensors packaging materials were evaluated in laboratory: polyether ether ketone (PEEK) and transformerboard (TB). The sensors have been tested for high intensity and short duration impacts similar to those occurring in short circuits. In addition, we evaluated the time response of sensors using an interrogation system with a 5 kHz sweep in order to analyze the short circuit response time properly. The results pointed that FBG pressure sensors using PEEK and TB are suitable for transformer winding monitoring. The static sensitivity obtained to PEEK based sensors was 0.911 pm/N, in the range of 800 N to 1500 N. This sensitivity is 4.47 higher than TB based sensors sensitivity. Dynamical tests performance showed an excellent repeatability for both sensors, in agreement with static observation.

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Partial discharge acoustic emission detector using mandrel-connected fiber Bragg grating sensor

Cited by 15 publications

References 44 publications

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

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

A Comprehensive Study of Optical Fiber Acoustic Sensing

Static and Dynamic Evaluation of a Winding Deformation FBG Sensor for Power Transformer Applications

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