The effect of DBDS, DBPC, BTA and DBP combinations on the corrosion of copper immersed in mineral transformer oil

Jaber, A. M. Y.; Mehanna, N. A.; Oweimreen, G. A.; Abulkibash, A. M.

doi:10.1109/tdei.2016.7556475

Cited by 16 publications

(11 citation statements)

References 19 publications

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“…The problem of sulphur corrosion has seriously affected the safe and stable operation of transformers. In the laboratory findings, the macro-experimental research and microsimulation analysis are used to conduct in-depth analysis and F I G U R E 1 7 Protective effect of different passivators on copper sheets [68] research on the above problems, revealing the reaction mechanism as well as the influencing factors of sulphur corrosion. The macro-experimental detection can be used to study on the characteristic parameters and changes of sulphur corrosion from a large scale space.…”

Section: Field Operation Measures For Sulphur Corrosionmentioning

confidence: 99%

Reviews on sulphur corrosion phenomenon of the oil–paper insulating system in mineral oil transformer

et al. 2020

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The active sulphur compounds in transformer oil would react with copper wires and produce cuprous sulphides, which then attach themselves to the surface of copper wires and insulating paper, thus reducing the electrical performance of oil-paper insulation and causing insulation failure. This article aims to make a comprehensive summary on the field of sulphur corrosion of oil-paper insulation in the mineral oil transformer, including the corrosion mechanism of sulphide on copper sheets, the deterioration mechanism of sulphide on oil-paper, the factors influencing sulphur corrosion reaction, the method of characterising the degree of sulphur corrosion, the protection technology of sulphur corrosion and the field operation measures for sulphur corrosion. Moreover, four key problems that need to be further solved were sorted out: the synergistic deterioration mechanism of sulphide and its transformation mechanism, the micro-process and forming path of sulphur corrosion reaction, the characteristic parameters and quantitative characterisation methods of sulphur corrosion degree, and the effective protection technology of sulphide corrosion. To solve these problems, efforts will be made for deeper understanding of the sulphur corrosion phenomenon and its deterioration mechanism based on theoretical background, the assessment methods and protection technology, endeavouring to put forward solid theoretical basis and feasible technical means for preventing sulphur corrosion insulation failure. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.

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Section: Field Operation Measures For Sulphur Corrosionmentioning

confidence: 99%

Reviews on sulphur corrosion phenomenon of the oil–paper insulating system in mineral oil transformer

et al. 2020

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“…The study on their physical and chemical properties will contribute to the development of advanced corrosive resistant materials and the realization of corrosive state monitoring. Numerous efforts have been made to study properties of the DBDS, DBS, and BiBz, including chemical reactivity [7,8], synergistic effect [9,10], detection methods [6,11], etc. [12,13].…”

Section: Introductionmentioning

confidence: 99%

Vibrational Spectra and Molecular Vibrational Behaviors of Dibenzyl Disulfide, Dibenzyl Sulphide and Bibenzyl

Wang

Song

Chen

et al. 2022

IJMS

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The vibration spectroscopy (Raman and infrared) of widely concerned molecules in sulfur corrosion phenomenon (Dibenzyl Disulfide, Dibenzyl Sulphide, and Bibenzyl) is detailedly analyzed based on density functional theory and experimental measurement. The dominant conformations of these molecules are determined according to Boltzmann distribution in relative Gibbs free energy. Additionally, noncovalent interaction analysis is conducted to indicate intramolecular interaction. Vibration normal mode is assigned based on potential energy distribution, which comprehensively reveals the molecular vibrational behaviors. Conformations weighted spectra are obtained and compared with experimentally measured spectra. We found that experimental spectra are in good agreement with the theoretical spectra in B3LYP-D3(BJ)/6-311G** level with a frequency correction factor. Furthermore, the divergence among these molecules is discussed. The vibrational behavior of the methylene group in the molecule shows a trend with the presence of the sulfur atom.

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“…By forming an impermeable complex layer on the surface of copper, the passivator can delay the reaction between copper and DBDS [12], [13]. However, the complex layer tends to be destroyed at high temperature or under mechanical stress, and the passivator will be consumed as the power equipment runs; thus, it eventually fails to protect the windings [12], [14]. Moreover, the metal-passivation-induced stray gassing effect may affect the dissolved gas analysis of the insulating oil [15].…”

Section: Introductionmentioning

confidence: 99%

Removal of Dibenzyl Disulfide (DBDS) by Polyethylene Glycol Sodium and Its Effects on Mineral Insulating Oil

Dong

Yang

et al. 2019

IEEE Access

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Dibenzyl disulfide (DBDS) is the major corrosive sulfur compound in mineral insulating oils, which will corrode the copper wires of windings in the oil-immersed power transformers and reactors and eventually cause operation failures. This paper studies the method to eliminate DBDS in insulation oils using the Polyethylene Glycol Sodium (Na-PEG) reagent. The preparation method of the Na-PEG reagent from NaOH and polyethylene glycol 400 is studied in the laboratory. The effect of the Na-PEG reagent dosage and reaction temperature on eliminating DBDS in insulating oils is studied, and a treatment process is recommended. An automatic processing device to remove DBDS from the transformer oil is developed, and the short-term electrical properties and long-term thermal stability of the insulating oil after the Na-PEG reagent treatment are tested. The results show that the Na-PEG reagent can efficiently eliminate DBDS in the insulating oil (the DBDS concentration decreases from 448 mg/kg to less than 5 mg/kg (undetectable) within 1 hour) and will not significantly negatively affect the oil properties such as the breakdown strength at the power frequency, dissipation factor or acidity. A preliminary exploration of the reaction mechanism is explored.

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The effect of DBDS, DBPC, BTA and DBP combinations on the corrosion of copper immersed in mineral transformer oil

Cited by 16 publications

References 19 publications

Reviews on sulphur corrosion phenomenon of the oil–paper insulating system in mineral oil transformer

Reviews on sulphur corrosion phenomenon of the oil–paper insulating system in mineral oil transformer

Vibrational Spectra and Molecular Vibrational Behaviors of Dibenzyl Disulfide, Dibenzyl Sulphide and Bibenzyl

Removal of Dibenzyl Disulfide (DBDS) by Polyethylene Glycol Sodium and Its Effects on Mineral Insulating Oil

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