Hybrid Optoelectronic Sensor for Current and Temperature Monitoring in Overhead Transmission Lines

Nazaré, Fábio Vieira Batista de; Werneck, Marcelo Martins

doi:10.1109/jsen.2011.2163709

Cited by 64 publications

(30 citation statements)

References 4 publications

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“…Current-voltage measurements under monochromatic light with a wavelength of 809 nm were carried out at various temperatures from 150 to 423 K and irradiances between 10 and 104 W/cm 2 . As an example, Figure 3 shows the measured temperature-dependent I-V curves for lowest and highest measured irradiances.…”

Section: Laser I-v Measurementsmentioning

confidence: 99%

“…Application examples for this technology cover lightning safe structural health monitoring [1], high-voltage transmission line sensors [2], fuel gauges in aircrafts, smart implants [3], and rotating [4] or vacuum chamber systems. Power-by-light systems are also interesting for optical communication networks [5] and have the potential for weight reduction, for example, in aircrafts and automobiles.…”

Section: Introductionmentioning

confidence: 99%

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On the temperature dependence of dual‐junction laser power converters

Reichmuth

Helmers

Philipps

et al. 2016

Progress in Photovoltaics

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Dual-junction GaAs laser power converters optimized for one monochromatic wavelength are presented, and their temperature dependence is experimentally evaluated. External quantum efficiency and irradiance-dependent currentvoltage measurements (10 to 104 W/cm 2 ) under monochromatic laser light (809 nm) have been undertaken to quantify temperature-and irradiance-dependent effects on the performance. The temperature dependence of the current matching of the two subcells, caused by the temperature-dependent absorbance, is quantified. Losses in performance due to variations in operating temperature for different power-by-light applications are calculated to be between 16.2% and 21.0%. Future potential enhancements in cell performance are discussed. For elevated temperatures, super-linear behavior of the spectral response with increasing irradiance is observed, which is attributed to effective luminescent coupling from the top to the bottom subcell as the device becomes more radiative limited. For low temperatures, where the bottom cell is overproducing, no dependence on irradiance is found, which shows the influence of photon transport losses to the substrate.

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Section: Laser I-v Measurementsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

On the temperature dependence of dual‐junction laser power converters

Reichmuth

Helmers

Philipps

et al. 2016

Progress in Photovoltaics

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“…There exist many successfully installed and developed DLR systems [1][2][3][4][5][6][7], which can be used for improving the accuracy of power system models [8,9] and then applied for optimal generation scheduling [10], or congestion management [11,12]. In typical DLR solutions [13], measuring stations equipped with temperature [14], elongation [15], strain, or inclination sensors [16,17] are mounted directly on the transmission line wires [14][15][16]. Such sensor stations are usually powered by a rechargeable battery during a normal line operation [11].…”

Section: Related Workmentioning

confidence: 99%

Time-Aware Monitoring of Overhead Transmission Line Sag and Temperature with LoRa Communication

et al. 2019

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The techniques of Dynamic Line Rating (DLR) for Overhead Transmission Line (OTL)’s are currently dynamically developed. DLR systems typically rely on weather, temperature, inclination, and current measurements to calculate tension and sag, where sensors need to be installed directly on wires. Such systems are very reliable and ensure high accuracy in determining maximum allowable current. However, their installation may require switching off the transmission line from the operation. In order to receive precise values regarding the actual operating conditions of the whole transmission line, DLR sensors measuring wire temperature or tension should be installed at many points of OTL. The minimum number of installation points should cover at least each tension section and critical spans, thereby increasing installation costs. The alternative method that allows for the monitoring of OTL is the use of the vision system based on cameras. Installed on the OTLs’ poles, cameras can take photos which, appropriately processed, can provide data about the sag and temperature of wires, without the necessity of switching OTL from the operation for installation or further maintenance. Such a vision system facilitates also data transmission, because it does not require measurement data to be transmitted from the sensor station installed on the wire to the base station located on the pole (for instance, via radio). This article aims to present the concept of a vision system that monitors sag and temperature of Overhead Transmission Lines (OTLs)’ using Long Range (LoRa) wireless communication and data transmission. The developed system consists of a camera and a microcomputer equipped with LoRa communication module. The whole system monitors OTLs’ spans by taking photos, processing images for wire sag-temperature estimation, and sending results to the operator’s Supervisory Control And Data Acquisition (SCADA). The system communication architecture is also proposed and investigated for data transmission time when monitoring the whole OTL.

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“…Some of these advantages are that they are compact and lightweight, easy to install, and they offer a wide measurement range and long distance signal transmission [1][2][3][4]. More advantages are their long term lasting and the possibility of working in flammable or explosive environments.…”

Section: Introductionmentioning

confidence: 99%

Optical fiber humidity sensor based on a tapered fiber asymmetrically coated with indium tin oxide

Ascorbe

Corres

Matı́as

2014

IEEE SENSORS 2014 Proceedings

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In this work a new humidity sensor based on lossy mode resonances (LMR) generated on a biconically tapered single mode optical fiber is presented. The tapered fiber was coated only on one side using indium tin oxide (ITO) by means of sputtering in order to generate the LMR. This asymmetrical structure (180 degrees of coating) makes the device sensitive to the polarization of the light so that the LMR can be separated in its TE and TM modes. The polarization dependence produces the effect of a smaller bandwidth in the LMR resonance with respect to the symmetrical coating, allowing a better resolution in the peak detection procedure.The sputtering process was carefully monitored in order to have the LMR placed in the range of measurement. Then the sensor was characterized using a climatic chamber with humidity in the range 20-80%RH. A sensitivity of 200 pm/%RH was obtained using a tapered fiber of 35 µm of waist diameter.

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Hybrid Optoelectronic Sensor for Current and Temperature Monitoring in Overhead Transmission Lines

Cited by 64 publications

References 4 publications

On the temperature dependence of dual‐junction laser power converters

On the temperature dependence of dual‐junction laser power converters

Time-Aware Monitoring of Overhead Transmission Line Sag and Temperature with LoRa Communication

Optical fiber humidity sensor based on a tapered fiber asymmetrically coated with indium tin oxide

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