Thermally Stimulated Acoustic Energy Shift in Transformer Oil

Petráš, Jaroslav; Kurimský, Juraj; Balogh, Jozef; Cimbala, Roman; Dzmura, J.; Dolník, Bystrík; Kolcunová, Iraida

doi:10.3813/aaa.918920

Cited by 27 publications

(4 citation statements)

References 18 publications

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“…They are the response of the cellulose insulation (paper, pressboard), the response of the oil and the interfacial polarization effect. Moisture, temperature, insulation geometry, oil conductivity and conductive aging by-products influence the dielectric response [8].…”

Section: The Basic Diagnostics Of Transformers By Frequency Domain Spmentioning

confidence: 99%

Frequency Domain Diagnostics of Transformer Insulation

Gutten

Šebök

Korenčiak

et al. 2019

Prib. metody izmer.

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The first part of paper deals with the base information about diagnostics of power transformers. In this part are presented differently insulating methods, for example method of recovery voltage method, method of polarization and depolarization currents and chromatographic analysis.The second part of paper deals use of method of frequency domain spectroscopy for oil power transformers. This method is used in analysis insulating condition of power transformer with system of oil-paper. It was found, that the results of these tests are highly impacted by the operating temperature during the experimental measurement. Moisture and conductivity between insulating paper and oil in an insulating system are highly dependent from temperature.In the other part, the paper presents experimental results of the frequency diagnostic measurement for a real single-phase traction transformer 110/27 kV at different operating temperatures and states (with oil and without).Finally in the last part, the paper presents comparing frequency insulating measurements among several the same single-phase transformers 110/27 kV.

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Section: The Basic Diagnostics Of Transformers By Frequency Domain Spmentioning

confidence: 99%

Frequency Domain Diagnostics of Transformer Insulation

Gutten

Šebök

Korenčiak

et al. 2019

Prib. metody izmer.

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“…To prevent a damage state of transformers, we perform different types of the measurements that should illustrate an actual condition of the measured equipment. It is therefore important to choose a suitable diagnostics for the right prediction of such conditions [3], [4].…”

Section: Introductionmentioning

confidence: 99%

Monitoring of oil distribution transformer in laboratory conditions

Gutten,

Korenciak,

Kucera

2024

jaeee

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The paper discusses the issue of analyzing the amount of gas and water contained in transformer oil. Such diagnostics include tests and measurements to verify the insulating and cooling properties of the oil, from which it is possible to determine the degree of transformer degradation. The experimental measurement is mainly focused on the state of the quantity of gases and water on the oil distribution transformer and their mutual ratios using monitoring and off-line measurements. In conclusion, an example of the analysis of the mechanical strength of the winding in the oil container of the aforementioned distribution transformer is the monitoring method of tracking the cooling curves through optical sensors.

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Section: Introductionmentioning

confidence: 99%