Accelerated Ageing Method of Mineral Oil Under High Electric Field and Partial Discharges

Manea, Andrei; Dumitran, Laurentiu Marius; Borzea, Claudia; Cazacu, Emil

doi:10.1109/atee52255.2021.9425323

Cited by 3 publications

(2 citation statements)

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“…Some of them are focused on the influence of the repeated electrical breakdown of MO on its dielectric properties [23]. An experimental method of accelerated aging of mineral oil under the action of high-strength electric field and PDs was presented in [14]. The results determined based on the frequency domain dielectric spectroscopy method indicate that the oil dielectric properties show drastic changes.…”

Section: Electrical Conduction In Mineral Oilmentioning

confidence: 99%

“…Few studies refer to the degradation of mineral oil and cellulosic paper under the action of the electric field and the PDs. A method used for an accelerated aging of the mineral oil under high electric field strength and the PDs has been presented in [14]. By using dielectric spectroscopy in the frequency domain, it was found that the main dielectric properties of the mineral oil placed in an AC electric field change significantly due to the action of the electric field and the PDs [14].…”

Section: Introductionmentioning

confidence: 99%

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Effect of Electrical Accelerated Aging on DC Resistivity of Mineral Oil Used in Power Transformers

et al. 2022

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Power transformers are still equipment of primary importance within power grids. The recent paradigm changes registered in the field of energy require the interconnection of electrical grids of much larger areas, even up to the level of an entire continent. In this context, knowing the state of the electrical equipment and that of the power transformers is an essential aspect to ensure safe operation conditions. The present work is related to the vulnerability of the oil–paper insulation systems of power transformers to different aging factors and their quick degradation under certain conditions. In this regard, the study proposed in this paper considers the measurement of DC resistivity on mineral oil samples contaminated with small amounts of accelerated aging oil under the action of high-strength electric field and partial discharges. In the absence of standardized procedures for accelerated electrical aging of mineral oil, an original method presented and discussed in previous articles is used. The obtained results clearly indicate that under the action of electrical stress, the mineral oil resistivity decreases significantly, showing that the oil’s electric properties worsen.

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Section: Electrical Conduction In Mineral Oilmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%