Effects of temperature and aging on furfural partitioning in the oil-paper system of power transformers

Yang, Lijun; Lin, Yuandi; Liao, Ruijin; Zhao, Xuetong; Sun, Wenbo; Zhang, Yiyi

doi:10.1109/tdei.2015.005530

Cited by 44 publications

(18 citation statements)

References 23 publications

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“…Analysis of the electrodes materials and their geometry influence on the PD generation are presented in Reference [34]. Other papers deal with the influence of the temperature [36], pressure [37], voltage harmonics [38] or different voltage types (DC or lightning impulse) [31] on the PD generation.…”

Section: Fundamentals Of Pdmentioning

confidence: 99%

Variability of the UHF Signals Generated by Partial Discharges in Mineral Oil

Kunicki

2019

Sensors

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The paper presents the results of the analysis on the variability of the ultra-high frequency (UHF) signals generated by partial discharges (PD) under the long-term AC voltage. Surface PD (SD) are generated by model PD source (PDS) immersed in brand new mineral oil. Three scenarios are compared and investigated, where different solid dielectrics are applied: pressboard paper (PBP), polytetrafluoroethylene (PTFE) and glass-ceramic (GLS). The PDS is powered continuously by the AC voltage with its relative level of 1.3 of the inception voltage (Ui) within 168 h. UHF signals generated by the continuously occurred SD within 168 h are registered. Various indicators describing the variability of the UHF signals emitted by SD are assigned and analyzed in order to discover if there are any relevant trends presented. Furthermore, some long-term characteristics of the UHF signals emitted by the applied PDS are also announced. As a result, some relevant trends are discovered and related to the properties of the applied dielectric materials, thus the variability of the UHF signals emitted by SD is confirmed. The highest variability of the UHF signals is associated with PBP and the first 48 h after PD inception. Moreover achieved results may be potentially applied for modeling of the PD variability in time, which may be useful for works that concern the development of the UHF method.

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Section: Fundamentals Of Pdmentioning

confidence: 99%

Variability of the UHF Signals Generated by Partial Discharges in Mineral Oil

Kunicki

2019

Sensors

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“…De Pablo and Pahlavanpour [16] proposed extracting furfural from paper using methanol and by measuring the furfural concentration in the methanol solvent. This method was validated and improved in our previous publication [21]. In this experiment, the following procedure was conducted.…”

Section: Parameter Measurementmentioning

confidence: 99%

“…The standard furfural analysis considers only the furfural content in oil; however, in reality, furfural is produced by the ageing of cellulose paper, which suggests that the furfural in insulation paper is typically neglected. Actually, temperature influences the distribution of furfural in oil and paper [20,21]; hence, temperature plays a significant role in the relationship between the DP and the furfural content in oil.…”

Section: Introductionmentioning

confidence: 99%

Effect of temperature on the production and diffusion behaviour of furfural in oil–paper insulation systems

Hao

Feng

Liao

et al. 2018

IET Generation, Transmission & Distribution

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“…The former insulates and cools the transformer as well as provides information on the condition of the transformer [2]. The latter insulates the copper coils in the transformer [3]. Under normal operation, the transformer insulating materials undergo chemical reactions and electrical stresses that result in the production of various chemical compounds.…”

Section: Introductionmentioning

confidence: 99%

Detection of 2FAL Furanic Compound in Transformer Oil Using Optical Spectroscopy Method and Verification Using Morse Oscillation Theory

et al. 2020

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The condition of a power transformer can be predicted based on the contents of the transformer oil. One of the most common parameters that are observed in the transformer oil is 2-Furaldehyde, a compound that is produced due to the aging of Kraft paper. Although the optical characterization of 2-Furaldehyde has been widely reported, the fundamental theories of the observation of the optical absorbance peaks have not been elaborated. This study investigates the optical characteristics of 2-Furaldehyde in the near infrared region. Ten samples with different concentrations of 2-Furaldehyde were prepared and verified using the conventional method. The samples were then characterized using optical spectroscopy method with 50 mm path length cuvettes. Three peaks were observed at 1610 nm-1640 nm, 1100 nm-1115 nm and 860 nm-890 nm wavebands and were correlated to the overtones of the aromatic C-H stretch in 2-Furaldehyde. The appearance of these overtones corresponding to the Morse Oscillation Theory was discussed. This fundamental knowledge is significant in developing a portable optical device that enables the detection of 2-Furaldehyde on site.

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Effects of temperature and aging on furfural partitioning in the oil-paper system of power transformers

Cited by 44 publications

References 23 publications

Variability of the UHF Signals Generated by Partial Discharges in Mineral Oil

Variability of the UHF Signals Generated by Partial Discharges in Mineral Oil

Effect of temperature on the production and diffusion behaviour of furfural in oil–paper insulation systems

Detection of 2FAL Furanic Compound in Transformer Oil Using Optical Spectroscopy Method and Verification Using Morse Oscillation Theory

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