Transformer Oil Degradation Mechanisms

Козлов, В. К.; Valiullina, D. M.; Turanova, O. A.; Turanov, N. A.

doi:10.1007/s10749-023-01510-2

Cited by 2 publications

(2 citation statements)

References 4 publications

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“…However, aromatic compounds that already exist in the oil's molecular structure have a great impact on the DDF of the liquid dielectric. In fact, the DDF of an oil sample is directly proportional to the concentration of the aromatic compounds within it [50]. Considering the electrical fault cases, there is a reduction in the aromatic compounds.…”

Section: Dielectric Dissipation Factor Stagementioning

confidence: 99%

A new technique for fault diagnosis in transformer insulating oil based on infrared spectroscopy measurements

Darwish,

Hassan,

Abdel‐Gawad

et al. 2024

High Voltage

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Condition monitoring of the insulating system within power transformers has a massive importance according to the electrical utilities. Dissolved gas analysis (DGA) is frequently used for this purpose. However, DGA lacks the necessary level of accuracy to identify all equipment faults, particularly in their initial stages of degradation. Also, it does not have the capability for real‐time monitoring and relies on manual sampling and laboratory testing, causing potential delays in fault identification. Additionally, the interpretation of DGA data necessitates specialised expertise, which may pose difficulties for smaller entities that have limited access to resources. Therefore, the contribution of this research is to use infrared spectroscopy measurements as a new effective technique substituting the DGA method for fault diagnosis in insulating oil. The inception faults that were considered in this study were the electrical fault (discharges of high energy) and the thermal fault (300°C < Temperature <700°C). Regarding that, two test cells were crafted especially for serving the simulation processes inside the laboratory for both types of inception faults. Subsequently, six samples of pure paraffinic mineral oil were taken to be degraded in the laboratory. Following that, all of them besides another sample that were not subjected to any kind of faults were taken to be examined by Fourier transform infrared (FTIR) spectroscopy to obtain an overview of the oil's behaviour in each fault case. After that, the FTIR analysis was initially verified utilising the DGA method. Then, for further affirmation, the dielectric dissipation factor (DDF) for all samples was measured. In the final analysis, the verification tests provide experimental evidence about the outperformance of this new optical technique in detecting the transformer's inception faults in addition to proving its potential for being a superior alternative to the well‐known traditional diagnostic techniques.

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Section: Dielectric Dissipation Factor Stagementioning

confidence: 99%

A new technique for fault diagnosis in transformer insulating oil based on infrared spectroscopy measurements

Darwish,

Hassan,

Abdel‐Gawad

et al. 2024

High Voltage

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“…The process of forming this peroxide was accelerated by light, an acidic atmosphere, humidity, and a catalyst. The oxidation process occurs when an interaction occurs between a certain amount of oxygen, oil, and fat [22] [23]. In this research, an attempt has been made to reduce the number of acids through the esterification process.…”

Section: Effect Of Addition Of Nano Silica Concentration On Acidity L...mentioning

confidence: 99%

Development of insulation oil based on Palm Oil Mill Effluent with nano silica

Sidik,

Amalia,

Agustina

et al. 2024

Sinergi

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Various studies and research have been conducted to find alternatives to liquid insulation. One that is considered the most potential is vegetable oil since it has various advantages, including non-toxic, biodegradable, renewable waste products due to reactions in the form of CO2 and water, high flash points, and better thermal characteristics. In this study, Palm Oil Mill Effluent (POME) was used as the raw material for insulation oil with the addition of an additive in the form of nano-silica, which improves the quality of the insulation oil. As for determining the feasibility of insulation oil, characteristic tests were carried out in the form of density, viscosity, moisture content, acid number, pour point, flash point, and breakdown voltage. Based on the results of the tests, it was obtained that the lowest density in pure oil was 0.8757 g / cm³, the lowest viscosity in oil with the addition of 0.13 wt% nano-silica was 4.0248 cSt, and the lowest acid number in pure oil was 0.5797 mgKOH / g. It was also discovered that the pour point value is the same for each sample, the moisture content is 0.05%, the flashpoint is > 104 °C, and the breakdown voltage is ≥ 60 kV for each sample. The data show that the insulation oil made from POME has the potential to be used as an alternative to insulation oil.

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Transformer Oil Degradation Mechanisms

Cited by 2 publications

References 4 publications

A new technique for fault diagnosis in transformer insulating oil based on infrared spectroscopy measurements

A new technique for fault diagnosis in transformer insulating oil based on infrared spectroscopy measurements

Development of insulation oil based on Palm Oil Mill Effluent with nano silica

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