Quantitative and Qualitative Monitoring System for Switchgear With Full Electrical Isolation Using Fiber-Optic Technology

Rosolem, J.B.; Bassan, Fábio Renato; Penze, Rivael Strobel; Floridia, Claudio; Leonardi, Ariovaldo Antonio; Pereira, Fernando Rocha; Nascimento, Carlos Alexandre Meireles

doi:10.1109/tpwrd.2014.2377122

Cited by 12 publications

(4 citation statements)

References 11 publications

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“…Another key advantage is the prospect of a purely optical power and data transmission link when combined with optical communication. [1][2][3][4][5] The application space for this technology includes sensors in special environments (structural health monitoring of wind turbines, [6] monitoring of high-voltage transmission lines [7][8][9][10] ), wireless powering of medical implants, [11][12][13][14][15] optically isolated power supply for electronic systems, [16][17][18] optical powering of remote antenna units, [2,[19][20][21] optically powered networks, [22,23] Internetof-Things devices, [24] and optical wireless power transfer. [25][26][27][28][29] Several groups have demonstrated PPCs based on III-V compound semiconductor materials with remarkable power conversion efficiencies well above 50%.…”

Section: Introductionmentioning

confidence: 99%

68.9% Efficient GaAs‐Based Photonic Power Conversion Enabled by Photon Recycling and Optical Resonance

Helmers

López

Höhn

et al. 2021

Physica Rapid Research Ltrs

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Section: Introductionmentioning

confidence: 99%

68.9% Efficient GaAs‐Based Photonic Power Conversion Enabled by Photon Recycling and Optical Resonance

Helmers

López

Höhn

et al. 2021

Physica Rapid Research Ltrs

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“…Rosolem et al [53], in 2015, presented the results of a PoF system to monitor high-voltage switchgear using video cameras and free space optics (FSO), and in [54], Rosolem et al proposed the use of PoF and FSO to measure current in high-voltage transmission lines.…”

Section: Utilities and Other Industriesmentioning

confidence: 99%

“…shows some applications using more complex electronic circuits with PoF. Figure 11(a) shows a 138-kV switchgear-monitoring application using fiber-powered video cameras to inspect the quality contact of the switchgear [53]. In this application, the three phases of 138-kV switchgear were monitored using three sensors.…”

Section: Figure 11mentioning

confidence: 99%

Power‐Over‐Fiber Applications for Telecommunications and for Electric Utilities

Rosolem¹

2017

Optical Fiber and Wireless Communications

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Beyond telecommunications, optical fibers can also transport optical energy to powering electric or electronic devices remotely. This technique is called power over fiber (PoF). Besides the advantages of optical fiber (immunity to electromagnetic interferences and electrical insulation), the employment of a PoF scheme can eliminate the energy supplied by metallic cable and batteries located at remote sites, improving the reliability and the security of the system. Smart grid is a green field where PoF can be applied. Experts see smart grid as the output to a new technological level seeks to incorporate extensively technologies for sensing, monitoring, information technology, and telecommunications for the best performance electrical network. On the other hand, in telecommunications, PoF can be used in applications, such as remote antennas and extenders for passive optical networks (PONs). PoF can make them virtually passives. We reviewed the PoF concept, its main elements, technologies, and applications focusing in access networks and in smart grid developments made by the author's research group.

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Section: Introductionmentioning

confidence: 99%

68.9% Efficient GaAs‐Based Photonic Power Conversion Enabled by Photon Recycling and Optical Resonance

Helmers

López

Höhn

et al. 2021

Physica Rapid Research Ltrs

View full text Add to dashboard Cite

For solar cells operating under the broad‐band solar spectrum, the photovoltaic conversion efficiency is fundamentally limited by transmission and thermalization losses. For monochromatic light, these losses can be minimized by matching the photon energy and the absorber material's bandgap energy. Furthermore, for high‐crystal‐quality direct semiconductors, radiative recombination dominates the minority carrier recombination. Light‐trapping schemes can leverage reabsorption of thereby internally generated photons. Such photon recycling increases the effective excess carrier concentration, which, in turn, increases photovoltage and consequently conversion efficiency. Herein, a back surface reflector underneath a GaAs/AlGaAs rear‐heterojunction structure leverages photon recycling to effectively reduce radiative recombination losses and therefore boost the photovoltage. At the same time, resonance in the created optical cavity is tailored to enhance near‐bandgap absorption and, thus, minimize thermalization loss. With a thin film process and a combined dielectric–metal reflector, an unprecedented photovoltaic conversion efficiency of 68.9 ± 2.8% under 858 nm monochromatic light at an irradiance of 11.4 W cm−2 is demonstrated.

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Quantitative and Qualitative Monitoring System for Switchgear With Full Electrical Isolation Using Fiber-Optic Technology

Cited by 12 publications

References 11 publications

68.9% Efficient GaAs‐Based Photonic Power Conversion Enabled by Photon Recycling and Optical Resonance

68.9% Efficient GaAs‐Based Photonic Power Conversion Enabled by Photon Recycling and Optical Resonance

Power‐Over‐Fiber Applications for Telecommunications and for Electric Utilities

68.9% Efficient GaAs‐Based Photonic Power Conversion Enabled by Photon Recycling and Optical Resonance

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