Integrated compact optical current sensors with high sensitivity

Huang, Duanni; Pintus, Paolo; Srinivasan, Sudharsanan; Bowers, John E.

doi:10.1117/12.2214499

Cited by 3 publications

(1 citation statement)

References 19 publications

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“…Traditional electromagnetic current transformers are no longer able to meet the requirements of the power grid's development. In recent years, the allfiber optical current transformer (FOCT) has been widely used in substations due to its advantages of small size, light weight, high accuracy, and immunity to electromagnetic interference [4][5][6]. To improve the stability of the current transformer and address issues such as harsh working environments, increased accuracy requirements, and limited fiber optic technology levels, the active all-fiber optical current transformers used in the power grid of China State Grid are equipped with dual closed-loop compensation modules, namely optical power compensation modules and modulation voltage compensation modules.…”

Section: Introductionmentioning

confidence: 99%

Research on feedback type all fiber current transformer status monitoring

Chen,

Guo,

Tian

et al. 2023

Fourteenth International Conference on Information Optics and Photonics (CIOP 2023)

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Section: Introductionmentioning

confidence: 99%

Research on feedback type all fiber current transformer status monitoring

Chen,

Guo,

Tian

et al. 2023

Fourteenth International Conference on Information Optics and Photonics (CIOP 2023)

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A Polarimetric Fiber Sensor for Detecting Current and Vibration Simultaneously

Huang

Xia

2022

2022 Asia Communications and Photonics Conference (ACP)

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Sagnac interferometer current transformer based on pulse multiplexing network structure

Zhao,

Li,

Zuo

et al. 2024

Appl. Opt.

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The monitoring of current plays an important role in accurately grasping the working status of the power system. In this paper, a Sagnac interferometer (SI) current transformer (CT) based on pulse multiplexing network structure is proposed. The network multiplexing structure can multiplex a pulsed light into multiple sensing signals, eliminating interference from light source power jitter and sudden changes in optical path loss. SI consists of a uniaxial working coupler, a 45° Faraday rotator, two quarter wave plates (QWPs), and spun fiber. The uniaxial working coupler used can achieve slow axis operation and fast axis cutoff, and convert light into linear polarization light. After passing QWPs, the forward and backward light changes from linear polarization to circular polarization, which can be used for current sensing. Experiments have shown that it has good linearity and repeatability. The proposed sensor has the advantages of low cost and simple structure, which has broad prospects in applications with not very high precision requirements.

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Integrated compact optical current sensors with high sensitivity

Cited by 3 publications

References 19 publications

Research on feedback type all fiber current transformer status monitoring

Research on feedback type all fiber current transformer status monitoring

A Polarimetric Fiber Sensor for Detecting Current and Vibration Simultaneously

Sagnac interferometer current transformer based on pulse multiplexing network structure

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