Fiber optic interferometric method for acoustic emissions detection on power transformer's bushing

Fracarolli, João P. V.; Floridia, Claudio; Dini, Danilo; Rosolem, J.B.; Teixeira, Romulo M.

doi:10.1109/imoc.2013.6646444

Cited by 5 publications

(4 citation statements)

References 6 publications

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“…The proposed approach improves the localization accuracy even further while enhancing the frequency range of the signal acquisition. The interferometric principle has also been used by Fracarolli et al [127] for monitoring of bushings in power transformers. The acoustic event makes changes in the frequency of the light propagating in the sensing arm, which is coupled with the light with a carrier frequency.…”

Section: Shm Using Sensors Other Than Fbg Sensorsmentioning

confidence: 99%

Optical Fiber Sensors for Ultrasonic Structural Health Monitoring: A Review

Soman

Wee

Peters

2021

Sensors

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Guided waves (GW) and acoustic emission (AE) -based structural health monitoring (SHM) have widespread applications in structures, as the monitoring of an entire structure is possible with a limited number of sensors. Optical fiber-based sensors offer several advantages, such as their low weight, small size, ability to be embedded, and immunity to electro-magnetic interference. Therefore, they have long been regarded as an ideal sensing solution for SHM. In this review, the different optical fiber technologies used for ultrasonic sensing are discussed in detail. Special attention has been given to the new developments in the use of FBG sensors for ultrasonic measurements, as they are the most promising and widely used of the sensors. The paper highlights the physics of the wave coupling to the optical fiber and explains the different phenomena such as directional sensitivity and directional coupling of the wave. Applications of the different sensors in real SHM applications have also been discussed. Finally, the review identifies the encouraging trends and future areas where the field is expected to develop.

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Section: Shm Using Sensors Other Than Fbg Sensorsmentioning

confidence: 99%

Optical Fiber Sensors for Ultrasonic Structural Health Monitoring: A Review

Soman

Wee

Peters

2021

Sensors

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“…Some researchers used MZI to detect partial discharge by acquiring acoustic signals. [70][71][72][73] Based on all fiber MZI and homodyne demodulation, 1.3-Pa acoustic pressure can be detected in a transformer. 72 A multichannel heterodyne interferometer capable of processing four channels simultaneously is applied to locate the partial discharge position.…”

Section: Partial Discharge Monitoringmentioning

confidence: 99%

Review on fiber-optic sensing in health monitoring of power grids

et al. 2019

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Fiber-optic sensing technology is best adapted to health monitoring and evaluation of power grids because of its immunity of electromagnetic interference, capabilities of multiplexing and distributed sensing, and tolerance to harsh environments. We review key fiber-optic sensing technologies, including fiber Bragg gratings, fiber-optic interferometers, optical time domain reflectometries, and their applications in three main parts of power grids, transformers, power towers, and overhead transmission lines, during the past 20 years. In particular, optical fiber composite overhead ground wire and optical phase conductor applied in power grids are the areas of great potential to go further. The perspectives of an intelligent fault diagnosis subsystem for power grids based on a fiber-optic sensing network are discussed, and related on-going work is described. The review shall be of benefit to both engineers and researchers in power grids and fiber-optic sensing.

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“…Currently, the methods of PD detection are mainly divided into two: electrical and non-electrical measurement [6,7,8]. Many electrical measurement methods are widely used, such as the electromagnetic wave coupling method, the capacitance coupling method, and the Ultra High Frequency (UHF) method.…”

Section: Introductionmentioning

confidence: 99%

A Fiber-Optic Sensor for Acoustic Emission Detection in a High Voltage Cable System

Zhang

Pang

Liu

et al. 2016

Sensors

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We have proposed and demonstrated a Michelson interferometer-based fiber sensor for detecting acoustic emission generated from the partial discharge (PD) of the accessories of a high-voltage cable system. The developed sensor head is integrated with a compact and relatively high sensitivity cylindrical elastomer. Such a sensor has a broadband frequency response and a relatively high sensitivity in a harsh environment under a high-voltage electric field. The design and fabrication of the sensor head integrated with the cylindrical elastomer is described, and a series of experiments was conducted to evaluate the sensing performance. The experimental results demonstrate that the sensitivity of our developed sensor for acoustic detection of partial discharges is 1.7 rad/(normalm⋅Pa). A high frequency response up to 150 kHz is achieved. Moreover, the relatively high sensitivity for the detection of PD is verified in both the laboratory environment and gas insulated switchgear. The obtained results show the great potential application of a Michelson interferometer-based fiber sensor integrated with a cylindrical elastomer for in-situ monitoring high-voltage cable accessories for safety work.

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Fiber optic interferometric method for acoustic emissions detection on power transformer's bushing

Cited by 5 publications

References 6 publications

Optical Fiber Sensors for Ultrasonic Structural Health Monitoring: A Review

Optical Fiber Sensors for Ultrasonic Structural Health Monitoring: A Review

Review on fiber-optic sensing in health monitoring of power grids

A Fiber-Optic Sensor for Acoustic Emission Detection in a High Voltage Cable System

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