Real Time Harmonic Analysis of Recuperative Current through Utilization of Digital Measuring Equipment

This paper is focused application of chosen thermal non-contact and contact methods for quality diagnostics of the transformer windings. In the first part of the paper it examines basic principles and application of non-contact temperature measurement on power transformers by thermovision. The second part is focused on analysis of thermal processes in distribution transformer. In the finally, it is examined experimental measurement on laboratory transformer with task to detect mechanical strength and subsequently short-circuit resistance of its winding. By means of the experimental measurements and following analysis it was showed the practical thermovision and contact thermal measurement by optical detectors for diagnostics of power oil transformers in field mechanical strength of winding material.

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“…where [14] amultiple of short-circuit strength, A 1 , A 2damping coefficients at cooling process, t 1 , t 2cooling time.…”

Section: Discussion To the Measured Datamentioning

confidence: 99%

Thermal diagnostic systems and their application for analysis of transformer winding

Šebök¹,

Kučera²,

Gutten³

et al. 2019

Diagnostyka

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“…This experimental analysis aims at determination of a new set of diagnostic and measuring techniques for the analysis of the condition of selected type of oil filled power transformers [24], [25].…”

Section: Diagnostic Insulating Analysis Of Transformersmentioning

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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“…Forms of interferences are: [5] • galvanic (different electrode potential of conductors), • capacity (conductive objects creating parasitical capacitance), • inductive (transfer of magnetic inductance), • wave (capacity interference in combination with interference inductive while in parallel). Field bonding (with its three distinctive sources): [6] • electrostatic field (lower frequencies), • magnetic fields (lower frequencies), • electro-magnetic fields (frequencies in the orders of in MHz).…”

Section: Interference Bond Mechanismmentioning

confidence: 99%

Electromagnetic Compatibility and Radiation Analysis in Control Room

Kučera

Gutten

Šimko

et al. 2019

Measurement Science Review

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The article presents a theoretical analysis of electromagnetic compatibility (EMC) and experimental measurement of effects of radiation and acoustic emission of high-voltage transformers for electronic equipment and working personnel in a control room. Electromagnetic compatibility and safety of equipment are not considered as two distinct areas of study in electric and electronic safety. Economic criteria cannot compromise safety but at the same time immunity levels must be relevant in order to establish a “Functional Safety”. Introducing Special Immunity Levels in the level of equipment testing allows us to combine the two areas of EMC and safety. The measurement was carried out in high-current of very high-voltage distribution station. A real-life analysis of effects of electric and electromagnetic field was carried out. FFT was used for mathematical processing of data which were later presented in a graphical form of a spectrally analyzed area. In the last part of the paper we discuss the suitability of acoustic camera to perform contactless monitoring of the health and operation conditions of the power transformer by analyzing acoustic field generated by the transformer core and windings in near control room.

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Real Time Harmonic Analysis of Recuperative Current through Utilization of Digital Measuring Equipment

Cited by 24 publications

References 3 publications

Thermal diagnostic systems and their application for analysis of transformer winding

Thermal diagnostic systems and their application for analysis of transformer winding

Frequency Diagnostics of Insulating System of Power Transformers

Electromagnetic Compatibility and Radiation Analysis in Control Room

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