Make Use Of Water and Furfural to Carry Out Transformer Aging Estimation

Yuan, Zhaohui; Chen, Mosheng; Lei, Hong; Lin, Chaohui

doi:10.1109/appeec.2010.5449347

Cited by 5 publications

(3 citation statements)

References 2 publications

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“…Furfural is a furan derivative in which the hydrogen atom is replaced by an aldehyde group, also called furan formaldehyde [ 20 ]. In the process of transformer aging, the total source of furfural is the hydrolysis ring of cellulose molecules (the component of insulating paper) in the pyrolysis reaction [ 21 , 22 ]. Therefore, the content of furfural directly reflects the degree of aging of the instrument.…”

Section: Introductionmentioning

confidence: 99%

Charge Transfer Effect on Raman and Surface Enhanced Raman Spectroscopy of Furfural Molecules

et al. 2017

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The detection of furfural in transformer oil through surface enhanced Raman spectroscopy (SERS) is one of the most promising online monitoring techniques in the process of transformer aging. In this work, the Raman of individual furfural molecules and SERS of furfural-Mx (M = Ag, Au, Cu) complexes are investigated through density functional theory (DFT). In the Raman spectrum of individual furfural molecules, the vibration mode of each Raman peak is figured out, and the deviation from experimental data is analyzed by surface charge distribution. In the SERS of furfural-Mx complexes, the influence of atom number and species on SERS chemical enhancement factors (EFs) are studied, and are further analyzed by charge transfer effect. Our studies strengthen the understanding of charge transfer effect in the SERS of furfural molecules, which is important in the online monitoring of the transformer aging process through SERS.

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Section: Introductionmentioning

confidence: 99%

Charge Transfer Effect on Raman and Surface Enhanced Raman Spectroscopy of Furfural Molecules

et al. 2017

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“…Under the practical conditions of operation, under the synergic action of thermal and electric stress, complex interactions between the components of the system leads to a series of processes such as: degradation of electroinsulating paper [1][2][3][4][5][6][7][8][9][10][11], corrosion of metal components, especially copper, with the formation of the products of corrosion that substantially reduces the insulation resistance and dielectric rigidity of the electro-insulating fluid [12][13][14][15][16][17][18][19], the formation of furans products (toxic products determined and monitored by various techniques) [3,8,[20][21][22][23], formation of the inert gases such as CO 2 as well as flammable as H 2 , CH 4 , C 2 H 4 , C 2 H 6 etc. [24][25][26][27][28][29][30][31][32][33][34].…”

mentioning

confidence: 99%

Studies on the Behavior Some Paints in Electro-insulating Fluid Based on Vegetable Esters

Lıngvay¹,

Bors²,

Ungureanu³

et al. 2018

Rev. Chim.

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For the purpose of using three different types of painting materials for the inner protection of the transformer vats, their behavior was studied under actual conditions of operation in the transformer (thermal stress in electro-insulating fluid based on the natural ester in contact with copper for electro-technical use and electro-insulating paper). By comparing determination of the content in furans products (HPLC technique) and gases formed (by gas-chromatography) in the electro-insulating fluid (natural ester with high oleic content) thermally aged at 130 �C to 1000 hours in closed glass vessels, it have been found that the presence the investigated painting materials lead to a change in the mechanism and kinetics of the thermo-oxidation processes. These changes are supported by oxygen dissolved in oil, what leads to decrease both to gases formation CO2, CO, H2, CH4, C2H4 and C2H6) and furans products (5-HMF, 2-FOL, 2 -FAL and 2-ACF). The painting materials investigated during the heat treatment applied did not suffer any remarkable structural changes affecting their functionality in the electro-insulating fluid based on vegetable esters.

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“…1. Explosion and simultaneous fire of three power transformers in Botoșani city, RO [13,14] -soil / surface water pollution by drain about 10 tons of mineral oil and air pollution by burning about 11 tons of oil During power transformers operation, under the synergic action of electrical, thermal and chemical stress factors (due to interactions between the electroinsulating fluid and Kraft paper in the presence of oxygen dissolved in oil), the electroinsulating fluid and Kraft degraded paper produce gases [15][16][17][18] and furanic compounds [19][20][21][22] which are persistent toxic products with harmful impact on the quality of environmental factors [23][24][25][26][27][28][29].…”

mentioning

confidence: 99%

Mineral Oil versus Vegetable Oil as Electroinsulating Fluids in Contact with Coating LacquersA thermochemical stability study

Lıngvay¹,

Circiumaru²,

Voina³

et al. 2019

Mat.Plast.

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The thermochemical stability of a MOL (mineral oil) electroinsulating mineral oil was studied by the gas chromatography technique, compared with a Voil (vegetable oil) electroinsulating fluid based on natural esters (oil), exposed to a longer (1000 hours) thermal treatment (110 � 5 �C) in contact with the core transformer plate (silicon steel sheet) both blank and covered by immersion with three different types of lacquers (L-G epoxide, L-528 alkyl epoxy-melamine copolymer and L-S polyurethane). Experimentally it was noted that during the thermal treatment applied and in contact with the silicon steel sheet, the investigated oils have produced mainly C2H4, CH4 and H2. The total amount of flammable gases formed in Voil (vegetable oil) is about 7.5 time lower than in MOL. It has also been found that the lacquer coating of the silicon steel sheet does not change the mechanism of gas formation processes in the investigated oils, as well as the fact that the oxygen content of the investigated oils decreases monotonously during the thermal treatment applied due to either the formation of CO2 and CO and the oxidation processes of investigated lacquers.

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Make Use Of Water and Furfural to Carry Out Transformer Aging Estimation

Cited by 5 publications

References 2 publications

Charge Transfer Effect on Raman and Surface Enhanced Raman Spectroscopy of Furfural Molecules

Charge Transfer Effect on Raman and Surface Enhanced Raman Spectroscopy of Furfural Molecules

Studies on the Behavior Some Paints in Electro-insulating Fluid Based on Vegetable Esters

Mineral Oil versus Vegetable Oil as Electroinsulating Fluids in Contact with Coating LacquersA thermochemical stability study

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