Identification failure of 3 MVA furnace transformer

Brandt, Martin S.

doi:10.1109/demisee.2016.7530472

Cited by 31 publications

(7 citation statements)

References 4 publications

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“…According to [12,13], thermal deformation is the greatest in the top area of the transformer. Thermal influence of core on surrounding areas of transformer (winding, oil, the tank) is plotted in Fig.…”

Section: Description Of Experimental Measurementmentioning

confidence: 99%

Thermal Measurement and its Application for Diagnostics of Distribution Oil Transformers

2019

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In the first part of the paper the theory of infrared radiation and the use of nondestructive measurement of electrical devices by means of thermovision are under analysis. In the second part of paper basic principles and application of non-contact temperature measurement are examined. In the third part of paper thermal processes in distribution oil transformer -temperature in dependence on height of oil transformer and temperature distribution in sectional plan of oil transformer -are considered. In the fourth part of paper, by means of the experimental measurements and subsequent analysis, practical thermal imaging and contact thermal measurements by optical detectors for the diagnosis of distribution oil transformers in the field of mechanical strength of windings are shown. In this paper, we wanted to show out the possibility of using thermal measurements in this field of analysis and detection of quality of winding for distribution oil transformer. It is possible to use these methods to localize places of faults, and they are also applicable for the diagnosis and detection of disorders of the quality of materials and other anomalies during operation of the equipment. By means of the experimental measurements followed by diagnostic analysis the practical use of thermovision and optical sensors for diagnostics of power oil transformers in field mechanical strength and quality of winding is demonstrated.

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Section: Description Of Experimental Measurementmentioning

confidence: 99%

Thermal Measurement and its Application for Diagnostics of Distribution Oil Transformers

2019

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“…The assessment of these measured values must be visible not only the rate of change, but also whether it is a permanent or reversible state. The aim of diagnostics of transformers is to verify that the machine complies with the determined conditions in accordance with standards [1].…”

Section: Introductionmentioning

confidence: 99%

Analysis of insulating parameters of oil transformer by time and frequency methods

Gutten¹,

Brncal²,

Šebök³

et al. 2020

Diagnostyka

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“…1 2 scale damage. The gas formed dissolves in the insulating oil in a quantity dependent on the type of gas, the quality of the insulating oil, the viscosity, temperature and pressure [3].…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, it is advisable to monitor the operation of the transformer in real time to keep track of what is going on inside. The easiest way to follow this medium is by transforming the transformer oil into several gases [3].…”

Section: Introductionmentioning

confidence: 99%

Frequency Diagnostics of Insulating System of Power Transformers

Gutten

Korenčiak

Brncal

et al. 2020

Electrical, Control and Communication Engineering

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The paper presents experimental diagnostics of the oil-paper insulating system of power transformers using progressive frequency method. The first part of the paper deals with the basic information about diagnostics of power oil transformers. The second part of the paper deals with the use of frequency domain spectroscopy (FDS) for power oil transformers. This method is used in the analysis of insulating condition of power transformer with the system of oil-paper. It was found that the results of these tests are highly influenced by the operating temperature during the experimental measurement. Moisture and conductivity between the insulating transformer paper and oil in an insulating system are highly dependent on the temperature. In the other part, the paper presents experimental results of the diagnostic measurement for a real traction oil transformer at different operating temperatures and states (with oil and without). Finally, the paper presents comparative measurement among several autotransformers with the same power. In experimental measurements, the correlation between the measured values and the operational aspects of the individual oil autotransformers are shown.

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Identification failure of 3 MVA furnace transformer

Cited by 31 publications

References 4 publications

Thermal Measurement and its Application for Diagnostics of Distribution Oil Transformers

Thermal Measurement and its Application for Diagnostics of Distribution Oil Transformers

Analysis of insulating parameters of oil transformer by time and frequency methods

Frequency Diagnostics of Insulating System of Power Transformers

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