On the Computation of the Voltage Distribution along the Non-Linear Resistor of Gapless Metal Oxide Surge Arresters

Christos A. Christodoulou, Vasiliki Vita, Valeri Mladenov and Lambros Ekonomou
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Christos A. Christodoulou: Department of Electrical and Electronic Engineering Educators ASPETE—School of Pedagogical and Technological Education, N. Heraklion, 141 21 Athens, Greece
Vasiliki Vita: Department of Electrical and Electronic Engineering Educators ASPETE—School of Pedagogical and Technological Education, N. Heraklion, 141 21 Athens, Greece
Valeri Mladenov: Department of Theoretical Electrical Engineering, Technical University of Sofia, “Kliment Ohridski” Blvd 8, 1000 Sofia, Bulgaria
Lambros Ekonomou: Department of Electrical and Electronic Engineering Educators ASPETE—School of Pedagogical and Technological Education, N. Heraklion, 141 21 Athens, Greece

Energies, 2018, vol. 11, issue 11, 1-14

Abstract: The voltage distribution along the non-linear resistance of metal oxide surges is of great importance for their proper operation, since the non-uniform potential distribution results in higher thermal stresses of the varistor discs near the high voltage electrode, leading to a faster ageing of the discs at the top and, consequently, a downgrade in arrester effectiveness and reliability or even failures. The current work deals with the examination of the voltage distribution along the non-linear resistance of medium voltage metal oxide gapless surge arresters, using an appropriate computer tool, discussing configuration that improve the voltage distribution. Moreover, the impact of various factors on the voltage distribution is examined. The extracted results can contribute to the more efficient design of modern metal oxide gapless surge arresters, in an effort to ensure their reliable operation to protect the electrical equipment against lightning surges.

Keywords: surge arresters; electric field; voltage distribution; varistor (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2018
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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