Failure study of metal-oxide surge arresters

Akbar, M.S.; Ahmad, Monir

doi:10.1016/s0378-7796(98)00052-2

Cited by 19 publications

(7 citation statements)

References 2 publications

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“…The actual breakdown phenomenon is still under debate, the models include tunnelling [4] and hotelectron [5], hole-assisted breakdown of the Schottky barrier. In addition, commercial varistors based on ZnO present a high nonlinear coefficient, but the degradation problem has not been resolved as yet [6][7][8]. Therefore, the efforts to search for new varistor materials have not been interrupted.…”

Section: Introductionmentioning

confidence: 99%

Novel varistor material based on terbium oxide

Tongye¹,

Zhao²,

Dong³

et al. 2008

J. Phys. D: Appl. Phys.

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A new varistor system based on terbium oxide is introduced in this paper. The ceramic samples were prepared using the standard ceramic method and sintered in air at 1300 °C for 2 h. From the I–V measurements, the samples exhibit varistor action with the nonlinear coefficient α = 3.9 and the breakdown voltage Eb = 40 V mm−1 and possess excellent electrical stability up to 70 °C. X-ray diffraction reveals that the ceramic is a single phase structure. It is proposed that the varistor action can be attributed to the adsorbed oxygen on the grain surfaces. This is on the basis of the barrier formation model for metal oxide varistor systems and the intrinsic characteristics of terbium oxide ceramic.

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Section: Introductionmentioning

confidence: 99%

Novel varistor material based on terbium oxide

Tongye¹,

Zhao²,

Dong³

et al. 2008

J. Phys. D: Appl. Phys.

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“…In this section, the causes of typical MOSA failures and the problems that may occur from these failures are investigated. These failures include internal humidity, superficial pollution, sealing loss, non-uniform voltage distribution, overvoltage due to switching, magnitude and duration of an excessive lightning surge, varistor degradation, and varistor displacement [11,21,[28][29][30][31][32].…”

Section: Failuresmentioning

confidence: 99%

A Survey of Diagnostic and Condition Monitoring of Metal Oxide Surge Arrester in the Power Distribution Network

et al. 2022

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Metal oxide surge arresters (MOSAs) are a popular solution for dealing with overvoltages due to lightning and switching in power distribution networks. As a result, a MOSA’s performance and longevity have a significant impact on the quality of energy and the frequency of outages. A MOSA performance is determined by several elements such as leakage current, partial discharge, and thermal image measured in various ways. In this study, different techniques for diagnostic and condition monitoring of MOSAs are discussed, and each method’s advantages and disadvantages are investigated. Additionally, the results of practical tests on two 20 kV healthy and degraded MOSAs are investigated and compared.

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“…The varistor properties are specified by U–I characteristics . Varistor construction materials , operating history , and temperature are three main factors that have influence on U–I characteristics. In order to investigate the influence of material, temperature, and degrading on MOSA U–I characteristic, experimental setup as shown in Figure was arranged.…”

Section: Experimental Testsmentioning

confidence: 99%

Electro-thermal modeling of surge arrester based on adaptive power loss estimation using finite element method

Seyyedbarzegar

Mirzaie

2015

Int. Trans. Electr. Energ. Syst.

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SUMMARYThis paper proposes an adaptive model for electro-thermal analysis of metal oxide surge arresters based on finite element method. The input of the proposed model has been derived from power loss curve using adaptive network based fuzzy inference system (ANFIS). Moreover, degradation factor has been introduced as a new index to represent operating history of metal oxide surge arrester. Therefore, applied voltage, temperature, and degradation factor have been considered as inputs in the ANFIS model to obtain accurate power loss which is of paramount importance in electro-thermal analysis. High voltage experimental setup and an oven have been prepared to acquire data for the proposed model. Degrading effect has been undertaken by measurement of the voltage-current characteristic of used and degraded varistors. The effect of assembling process, in addition, has been considered using different virgin (not degraded) varistors in experimental measurements. In addition, according to the IEC standard, the aging effect has been obtained experimentally by putting the varistor under 115°C and continuous operating voltage for 1000 h. To validate the results of the electro-thermal model, thermal infrared camera has been used under different applied voltages. Obtained results show that the electro-thermal behavior of surge arrester is predictable with high precision through the proposed artificial model. Copyright © 2015 John Wiley & Sons, Ltd.key words: adaptive network based fuzzy; inference system; degradation factor; electro-thermal model; finite element method; power loss; metal oxide surge arrester

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Failure study of metal-oxide surge arresters

Cited by 19 publications

References 2 publications

Novel varistor material based on terbium oxide

Novel varistor material based on terbium oxide

A Survey of Diagnostic and Condition Monitoring of Metal Oxide Surge Arrester in the Power Distribution Network

Electro-thermal modeling of surge arrester based on adaptive power loss estimation using finite element method

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