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High-voltage monitoring by the fiber-optic recirculating measuring system
https://doi.org/10.32446/0368-1025it.2020-2-38-44
Abstract
Optical technologies for measuring electrical quantities attract great attention due to their unique properties and signifi cant advantages over other technologies used in high-voltage electric power industry: the use of optical fibers ensures high stability of measuring equipment to electromagnetic interference and galvanic isolation of high-voltage sensors; external electromagnetic fields do not influence the data transmitted from optical sensors via fiber-optic communication lines; problems associated with ground loops are eliminated, there are no side electromagnetic radiation and crosstalk between the channels. The structure and operation principle of a quasi-distributed fiber-optic high-voltage monitoring system is presented. The sensitive element is a combination of a piezo-ceramic tube with an optical fiber wound around it. The device uses reverse transverse piezoelectric effect. The measurement principle is based on recording the change in the recirculation frequency under the applied voltage influence. When the measuring sections are arranged in ascending order of the measured effective voltages relative to the receiving-transmitting unit, a relative resolution of 0,3–0,45 % is achieved for the PZT-5H and 0,8–1,2 % for the PZT-4 in the voltage range 20–150 kV.
About the Authors
A. V. Polyakov
Belarusian State University
Belarus
Belarus
Alexandre V. Polyakov
Minsk
M. A. Ksenofontov
Research Institution “Institute of Applied Physical Problems named after A. N. Sevchenko” of Belarusian State University
Belarus
Belarus
Michail A. Ksenofontov
Minsk
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Review
For citations:
Polyakov A.V., Ksenofontov M.A. High-voltage monitoring by the fiber-optic recirculating measuring system. Izmeritel`naya Tekhnika. 2020;(2):38-44. (In Russ.) https://doi.org/10.32446/0368-1025it.2020-2-38-44
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