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Development and Pilot Operation of a Three-Phase Fully Optical Measuring Voltage Transformer of 220 kV with Digital Output

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Power Technology and Engineering Aims and scope

An electronic three-phase fully fiber-optic measuring voltage transformer (FOVT) of accuracy class 0.2 for a nominal voltage of 220 kV with a digital output for operation at power system facilities, including electrical substations, is described. The operation principle of the device is based on the use of a longitudinal linear electro-optical effect (Pockels effect) for measuring AC voltage. The fiber-optic measurement scheme based on low-coherent interferometry is connected via a fiber cable to an optical high-voltage primary converter (HVPC) with an electro-optical crystal placed in it; there are no additional voltage dividers inside. The digital signal processing unit (DPU) contains optical and electronic circuits for generating, detecting, and processing an electro-optical signal. FOVT has a digital interface that complies with the IEC 61950-9-2 LE standard, and can be used as a component for the Digital Substation and Smart Power Grid technologies. The design features of the HVPC and the DPU are described and the results of the metrological characteristics of FOVT-220, based on the data obtained during the certification and pilot operation at the 220 kV electrical substation, are presented.

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Authors and Affiliations

  1. IQ Systems Ltd, Dzerzhinsk, Nizhny Novgorod Region, Russia

    A. N. Morozov, A. A. Stepanov & S. V. Malakhov

  2. Institute of Physics of Microstructures, Russian Academy of Sciences, Nizhny Novgorod, Russia

    V. V. Ivanov

Authors
  1. A. N. Morozov
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  2. A. A. Stepanov
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  3. S. V. Malakhov
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  4. V. V. Ivanov
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Correspondence to A. N. Morozov.

Additional information

Translated from Élektricheskie Stantsii, No. 2, February 2020, pp. 28 – 36.

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Morozov, A.N., Stepanov, A.A., Malakhov, S.V. et al. Development and Pilot Operation of a Three-Phase Fully Optical Measuring Voltage Transformer of 220 kV with Digital Output. Power Technol Eng 54, 261–268 (2020). https://doi.org/10.1007/s10749-020-01200-3

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  • DOI: https://doi.org/10.1007/s10749-020-01200-3

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