Quasi-distributed fibre-optic sensor for high-voltage measurements

Authors

  • Michael A. Ksenofontov A. N. Sevchenko Institute of Applied Physical Problems, Belarusian State University, 7 Kurchatava Street, Minsk 220045, Belarus
  • Alexandre V. Polyakov Belarusian State University, 4 Niezaliezhnasci Avenue, Minsk 220030, Belarus

Keywords:

quasi-distributed fibre-optic sensor, piezoelectric effect, recirculation frequency, spectral multiplexing, high-voltage measurements, accuracy

Abstract

The recirculation measurement method is used to control high voltage. The quasi-distributed fibre-optic sensor was constructed as a closed optoelectronic circuit formed by a tunable radiation source, sensitive elements separated by spectral reflective elements, avalanche photodiodes and a regeneration block. A dual-wavelength tunable fibre ring laser was used as a radiation source had an output radiation power of 4.5 mW, two generated wavelengths separated by 200 GHz with a line width of 22.8 GHz. The sensitive element of this device was the single mode optical fibre, wound onto the piezoceramic tube. The measurement principle is based on the inverse transverse piezoelectric effect, as a result of which the applied electric voltage causes a change in the dimensions of the piezoceramic tube and the length of the wound optical fibre. Based on the theory of coupled modes, the spectral-energy parameters of five adjacent fibre Bragg gratings in the spectrum were simulated and the characteristics of the gratings were established, allowing them to be used as spectral-selective elements. Changing the recirculation frequency at different wavelengths allowed the electric voltage to be monitored at different points with high accuracy. The resolution of these sensors is estimated to be 4.3 Hz/kV for a piezoelectric ceramic tube radius of 12 cm. Relative accuracy of 0.30–0.45 % for the PZT-5H at the multi-point measurements is achieved in the voltage range of 20 –150 kV. The system is designed for automated measurement of electrical voltage at distribution transformer stations and high-voltage power lines.

Author Biographies

  • Michael A. Ksenofontov, A. N. Sevchenko Institute of Applied Physical Problems, Belarusian State University, 7 Kurchatava Street, Minsk 220045, Belarus

    doctor of science (physics and mathematics), docent; head of the laboratory of physical chemistry of polymer materials and natural organic compounds

     

  • Alexandre V. Polyakov, Belarusian State University, 4 Niezaliezhnasci Avenue, Minsk 220030, Belarus

    doctor of science (physics and mathematics), docent; professor at the department of physics and aerospace technologies, faculty of radiophysics and computer technologies

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Published

2025-11-03

Issue

No. 2 (2025): Journal of the Belarusian State University. Physics

Section

Optics and Spectroscopy

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How to Cite

(1)
Ksenofontov, M. A.; Polyakov, A. V. Quasi-Distributed Fibre-Optic Sensor for High-Voltage Measurements. Журнал Белорусского государственного университета. Физика 2025, No. 2, 31-40.