Intensity-Modulated Fiber-Optic Sensor: A Novel Grid Measurement Unit

This article presents a novel approach to physical-displacement-based power grid measuring via an intensity-modulated fiber-optic sensor (IMFOS). An IMFOS utilizes one fiber to transmit the intensity modulated light from its electro-optic controller to a fiber-optic probe. The power grid voltage and...

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Bibliographic Details
Published in:IEEE transactions on industrial informatics 2023-04, Vol.19 (4), p.5566-5575
Main Authors: Yao, Wenxuan, Zhan, Lingwei, Rooke, Sterling Sean, Vizas, Christopher, Kaybulkin, Victor, King, Thomas J., Xiao, Bailu, Li, Zhi, Liu, Yilu, Yin, He
Format: Article
Language:English
Subjects:
Current measurement
Intensity modulated fibre optics
Intensity-modulated fiber optic (IMFO)
Luminous intensity
Measuring instruments
Optical fiber sensors
Optical fibers
Performance evaluation
Phasors
Piezoelectricity
power grid measuring
Power grids
Probes
Sensitivity
Transducers
Units of measurement
universal grid analyzer (UGA)
Voltage measurement
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Summary:This article presents a novel approach to physical-displacement-based power grid measuring via an intensity-modulated fiber-optic sensor (IMFOS). An IMFOS utilizes one fiber to transmit the intensity modulated light from its electro-optic controller to a fiber-optic probe. The power grid voltage and current can induce physical displacements in transducers via the piezoelectric effect and the Lorentz law, respectively, which then result in a distance change between the optical probe and the reflective surface of the transducers. In parallel, multiple fibers are used to collect the reflective light for electro-optic conversion. A National-Instruments-based characterization platform is set up for performance evaluation. The testing result demonstrates that the IMFOS is immune to the inherent dc and low-frequency saturation issues prevalent in conventional potential and current transformers. Finally, the IMFOS is implemented in a universal grid analyzer to illustrate its applicability for phasor estimation in actual power grids.
ISSN:1551-3203
1941-0050
DOI:10.1109/TII.2022.3194631