ИССЛЕДОВАНИЕ ЭЛЕКТРИЧЕСКИХ ХАРАКТЕРИСТИК И МИКРОСТРУКТУРЫ ВАРИСТОРОВ ДЛЯ ОГРАНИЧЕНИЯ ПЕРЕНАПРЯЖЕНИЙ В КАБЕЛЬНЫХ СЕТЯХ

A.V. Korzhov; V.I. Safonov; M.A. Dziuba; R.M. o. Babayev; I.E. Korostelev; D.A. Zherebtcov

doi:10.14529/power230204

Authors

A.V. Korzhov South Ural State University
V.I. Safonov South Ural State University
M.A. Dziuba South Ural State University
R.M. o. Babayev South Ural State University https://orcid.org/0000-0003-0931-4543
I.E. Korostelev South Ural State University, “Energy + 21” JSC
D.A. Zherebtcov South Ural State University

DOI:

https://doi.org/10.14529/power230204%20

Keywords:

overvoltage, switching overvoltage, distribution system, insulation, surge arresters, metal oxide varistors, zinc oxide (ZnO), C-V characteristic, cable line

Abstract

The article is devoted to the study of the relationship between the electrical characteristics and the microstructure of the varistor. The C-V characteristics of varistors from 10 manufacturers represented in Russian Federation were experimentally determined. To compare the parameters of the samples, the dependences "electric field-conductivity" (E-σ) were built out, the coefficients of nonlinearity and were determined. The microstructure of metal oxide varistors and their chemical composition were studied. As a result of statistical processing of the data, it was concluded that the ZnO grain size significantly affects the field strength at the beginning of the conduction band. The results obtained are intended for the selection of a varistor according to the ability to dissipate the power of an impulse action.

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Author Biographies

A.V. Korzhov, South Ural State University

Dr. Sci. (Eng.), Ass. Prof., Prof. of the Department of Power Plants, Networks and Power Supply Systems, Vice-Rector for Research

V.I. Safonov , South Ural State University

Cand. Sci. (Phys. and Math.), Ass. Prof., Ass. Prof. of the Department Power Plants, Net-works and Power Supply Systems

M.A. Dziuba , South Ural State University

Cand. Sci. (Eng.), Ass. Prof., Ass. Prof. of the Department of Power Plants, Networks and Power Supply Systems

R.M. o. Babayev , South Ural State University

Postgraduate Student, Engineer of the Department of Power Plants, Networks and Power Supply Systems

I.E. Korostelev , South Ural State University, “Energy + 21” JSC

Postgraduate Student of the Department of Power Plants, Networks and Power Supply Systems; Head of Research and Development Department

D.A. Zherebtcov, South Ural State University

Dr. Sci. (Chem.), Senior Researcher of the Department of Materials Science and Physical Chemistry of Materials

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