A review: Research on corrosive sulphur in electrical power equipment

Yuan, Yuan; Gao, Xue; Jian, Zhou; Liu, Guoyong; Xiongwei, Kuang; Yang, Lijun; Liao, Ruijin

doi:10.1049/hve2.12155

Cited by 13 publications

(7 citation statements)

References 100 publications

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“…During the corrosion test, the ageing products of insulating oil and paper promote the −CH 3 of TTA‐Cu and the free long chain to break and dissociate to C· and H· in the oil. The ageing product of oil‐paper (RCOO−H) [33] can provide H· and generate H 2 with the H·in the oil. The C· in the oil combines with dissolved oxygen to generate CO and CO 2 .…”

Section: Resultsmentioning

confidence: 99%

Gas production mechanism of Irgamet 39 and its long‐term corrosion resistance

et al. 2022

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The phenomenon of transformer failure caused by oil‐sulphur corrosion of oil₋paper insulation system has always been concerned by scholars. Irgamet 39 is the most used metal passivator for inhibiting sulphur corrosion. However, Irgamet 39 causes abnormal dissolved gas in oil during the process of exerting anti‐corrosion effect. Herein, the gas production mechanism of Irgamet 39 and its long‐term corrosion resistance were investigated. Compared with other metal passivators, the Irgamet 39 produces more dissolved gases in oil, especially H2, CO and CO2. The main sources of free radicals in the gas production process are from the branched chains of the Irgamet 39 structure (−CH2N(C8H17)2 and −CH3). Furthermore, the ageing products of insulating paper and oil promote the cleavage of the chain in the Irgamet 39 molecule, which then causes Irgamet 39 to generate more dissolved gases. Irgamet 39 exhibits excellent long‐term corrosion inhibition properties,while it also leads to abnormal gases in the oil, which can affect the interpretation of the dissolved gas analysis data and thus interfere with the diagnosis. This work provides useful information for the practical application of Irgamet 39 and helps electrical workers make reasonable predictions for transformer problems.

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Section: Resultsmentioning

confidence: 99%

Gas production mechanism of Irgamet 39 and its long‐term corrosion resistance

et al. 2022

Self Cite

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“…Safe, reliable, and economical power supply is the primary goal of the power industry; power transformer is the key power transmission and transformation equipment in the power system [1][2][3][4]. The healthy state of transformer equipment directly affects the safe and stable operation of power system; it will bring largescale power paralysis and huge economic losses once serious transformer fault occurs [5][6][7]. Internal insulation fault is the main cause of transformer fault, the internal insulation system is the composite insulation of insulating oil and insulating paper@paperboard for the oil immersed transformer widely used in power grid [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

A review on a novel method for aging evaluation of transformer insulating paper based on methanol

Chen

Sun

Cheng

et al. 2023

IET Generation Trans & Dist

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The insulation paper is a crucial factor for evaluating the insulation status of transformers. The traditional evaluation methods for insulation paper are dissolved gas component content analysis (CO and CO 2 ) and furfural (2-FAL) content analysis in oil. The detection principle of the former leads to its low accuracy, while the field application effect of the latter is not ideal due to the easy oxidation of furfural and low content. Methanol, result of its good stability and high production compared with other marker products (CO, CO 2 , 2-FAL) has been investigated as a novel marker for aging evaluation of transformer insulating paper in recent years. The results of the investigation indicated that there is a good correlation between the content of methanol in oil and the degree of polymerization under laboratory conditions, which reflected the insulation aging state of the transformer insulating paper more accurately. This paper summarizes the current research status of methanol formation mechanism, detection methods and aging evaluation in insulating oil, and points out the key problems to be solved and development prospects, hoping to provide relevant reference for aging evaluation of oil immersed power transformer.

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“…Nowadays, the sulfur corrosion problem of power equipment has received widespread concern [1][2][3][4][5]. The failures caused by corrosive sulfur greatly affect the safety and stability of the power system and result in substantial economic losses.…”

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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A review: Research on corrosive sulphur in electrical power equipment

Cited by 13 publications

References 100 publications

Gas production mechanism of Irgamet 39 and its long‐term corrosion resistance

Gas production mechanism of Irgamet 39 and its long‐term corrosion resistance

A review on a novel method for aging evaluation of transformer insulating paper based on methanol

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

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