Review of Fiber Optic Diagnostic Techniques for Power Transformers

N’cho, Janvier Sylvestre; Fofana, I.

doi:10.3390/en13071789

Cited by 43 publications

(27 citation statements)

References 79 publications

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“…Advantages of OCTs in the monitoring of power systems are also significant [ 5 , 67 ]. Since the FE response time is in the range of ns or less, the frequency range is practically limited by the optoelectronic conversion block.…”

Section: Faraday Effect Magnetometry and Electrical Current Sensingmentioning

confidence: 99%

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Fiber Optic Sensors Based on the Faraday Effect

Mihailović

Petričević

2021

Sensors

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Some 175 years ago Michael Faraday discovered magnetic circular birefringence, now commonly known as the Faraday effect. Sensing the magnetic field through the influence that the field has on light within the fiber optic sensor offers several advantages, one of them fundamental. These advantages find application in the measurement of electric current at high voltages by measuring the induced magnetic field, thus warranting application for this kind of fiber optic sensor (FOS) in future smart grids. Difficulties in designing and manufacturing high-performance FOSs were greatly alleviated by developments in optical telecommunication technology, thus giving new impetus to magnetometry based on the Faraday effect. Some of the major problems in the processing of optical signals and temperature dependence have been resolved, yet much effort is still needed to implement all solutions into a single commercial device. Artificial structures with giant Faraday rotation, reported in the literature in the 21st century, will further improve the performance of FOSs based on the Faraday effect. This paper will consider obstacles and limits imposed by the available technology and review solutions proposed so far for fiber optic sensors based on the Faraday effect.

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Section: Faraday Effect Magnetometry and Electrical Current Sensingmentioning

confidence: 99%

“…The scope of this paper is limited to FOSs based on the FE. These include applications outside power grids, from the protection of generators to tokamaks [ 4 , 5 , 6 ], as well as magnetometers. Due to the large scope of design issues researchers have no choice but to place emphasis on one aspect of sensor design in a review paper.…”

Section: Introductionmentioning

confidence: 99%

Fiber Optic Sensors Based on the Faraday Effect

Mihailović

Petričević

2021

Sensors

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“…(5) Hence, they have attracted interest for improving the performance of electrical power networks and for measuring the amplitude of AC voltage. (6,7) Several voltage-sensing technologies based on the electro-optical Pockels effect have already been proposed (8,9) with controllable sensitivity and measurement range. However, they provide low sensitivity.…”

Section: Introductionmentioning

confidence: 99%

Voltage Sensor Based on a Plastic Optical Fiber with a Rectangular Hole

Seo¹,

Prabowo²,

Park³

2021

Sensors and Materials

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In this paper, we present an AC voltage sensor based on a plastic optical fiber (POF) with a rectangular hole filled with a polymer-dispersed liquid crystal (PDLC) film. The dimensions of the rectangular hole and PDLC film used in the experiment were approximately 2 × 0.65 mm 2 and 20 × 0.6 × 0.2 mm 3 , respectively. The root-mean-square (RMS) amplitude of AC voltage at 60 Hz from 0 to 80 V was measured using this sensor. The transmittance of this sensor was a nonlinear function of the applied voltage. In the approximate linear region from 8 to 23 V, the sensitivity of this sensor was approximately 0.017 V −1 . The results show that the proposed voltage sensor can be used to measure the RMS amplitude of AC voltage.

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“…The 2-FAL detection in this kind of matrix is becoming interesting for diagnostic purposes, since it is recognized that the presence of 2-FAL in the oil of oil-insulated electrical equipment is an important marker of the degradation of the insulating system. 2-FAL can be present as a byproduct of the thermal degradation of cellulose, so 2-FAL detection in insulating oil is a crucial task for preventing accelerated aging phenomena of oil-paper insulation (paper windings, pressboards) in transformers [3][4][5]. These phenomena heavily influence the effective lifetime of power transformers.…”

Section: Introductionmentioning

confidence: 99%

A Molecularly Imprinted Polymer Based SPR Sensor for 2-Furaldehyde Determination in Oil Matrices

et al. 2021

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Optical chemosensors with surface plasmon resonance (SPR) transduction are widely employed, even in complex environments, such as those outside the laboratory. In this context, not only the chemical nature but also the physical form of the receptor layer is particularly relevant. Synthetic receptors as molecularly imprinted polymers (MIPs) are well suited. This is demonstrated here in the case of an SPR sensor platform based on a multimode plastic optical fiber, which is very promising for on site application due to the low dimensions and low cost. A specific MIP was used as the receptor, with high affinity for the substance to be determined, 2-furaldehyde, in water. Here, a medium of high refractive index, i.e., vegetable oil, was considered because of the high interest for its determination in industrial diagnostics. The effects of the MIP layer thickness and the washing extent on the quality of the analytical signal were investigated. Better spectra were generated at the thinner MIP layer, while a lower detection limit is reached with extended washing.

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Review of Fiber Optic Diagnostic Techniques for Power Transformers

Cited by 43 publications

References 79 publications

Fiber Optic Sensors Based on the Faraday Effect

Fiber Optic Sensors Based on the Faraday Effect

Voltage Sensor Based on a Plastic Optical Fiber with a Rectangular Hole

A Molecularly Imprinted Polymer Based SPR Sensor for 2-Furaldehyde Determination in Oil Matrices

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