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1
Content available Fault diagnosis of electrical faults of three-phasei nduction motors using acoustic analysis
Glowacz Adam, Sulowicz Maciej, Kozik Jarosław, Piech Krzysztof, Glowacz Witold, Li Zhixiong, Brumercik Frantisek, Gutten Miroslav, Korenciak Daniel, Kumar Anil, Lucas Guilherme Beraldi, Irfan Muhammad, Caesarendra Wahyu, Lui Hui
Bulletin of the Polish Academy of Sciences. Technical Sciences
|
2024
|
Vol. 72, nr 1
art. no. e148440
EN
Fault diagnosis techniques of electrical motors can prevent unplanned downtime and loss of money, production, and health. Various parts of the induction motor can be diagnosed: rotor, stator, rolling bearings, fan, insulation damage, and shaft. Acoustic analysis is non-invasive. Acoustic sensors are low-cost. Changes in the acoustic signal are often observed for faults in induction motors. In this paper, the authors present a fault diagnosis technique for three-phase induction motors (TPIM) using acoustic analysis. The authors analyzed acoustic signals for three conditions of the TPIM: healthy TPIM, TPIM with two broken bars, and TPIM with a faulty ring of the squirrel cage. Acoustic analysis was performed using fast Fourier transform (FFT), a new feature extraction method called MoD-7 (maxima of differences between the conditions), and deep neural networks: GoogLeNet, and ResNet-50. The results of the analysis of acoustic signals were equal to 100% for the three analyzed conditions. The proposed technique is excellent for acoustic signals. The described technique can be used for electric motor fault diagnosis applications.
2
Content available Monitoring of oil distribution transformer in laboratory conditions
Gutten Miroslav., Korenciak Daniel, Kucera Matej
Journal of Automation, Electronics and Electrical Engineering
|
2023
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Vol. 5, No. 3
15--30
EN
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.
3
Content available remote Steering structure for a single wheeled vehicle
Beno Patrik, Gutten Miroslav, Simko Milan, Kubis Matej
Przegląd Elektrotechniczny
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2021
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R. 97, nr 1
105--108
EN
Nowadays, there is a need to reduce emissions in the world and use electricity to drive vehicles. There is an increasing interest in small passenger vehicles suitable for crowded cities. In this paper it was designed a universal control structure for a single-wheeled vehicle with a tilt sensor. In this structure is possible to apply a vehicle with parallel wheel arrangement. The paper describes a current and position loop with PI and PD controllers suitable for a single wheeled vehicle. It was designed a simple complementary filter for data processing. A complementary filter evaluate the data from accelerometer and gyroscope, which includes all signal processing requirements for control. Additionally, a program block diagram was also designed to be used in any microprocessor. The results and recommendations of the adjustment for further work with the proposed structure are evaluated in the end of the paper.
PL
W artykule zaprezentowano system sterowania jednokołowym pojazdem elektrycznym stosowanym do poruszania się w zatłoczonym mieście. Do kontroli prądu i pozycji pojazdu zastosowano sterowniki PI i PD. Do kontroli ruchu zastosowano czujniki przyśpieszenia oraz pochyelnia ora żyroskop.
4
Content available remote Analysis of acoustic and electromagnetic emission of traction transformers
Kučera Matej, Brncal Peter, Cefer Viktor, Jarina Roman, Gutten Miroslav
Przegląd Elektrotechniczny
|
2021
|
R. 97, nr 5
107--110
EN
The article analyzes the diagnostics of a high-voltage power transformer by means of an acoustic camera. It is one of the basic diagnostics and monitoring of remote measurement and analysis of acoustic emission. The high-voltage power transformer generates acoustic emission, thanks to which we can analyze the operating and fault states of the device. The article shows the use of the acoustic camera for operational monitoring and diagnostics of its life through noise from the source of the transformer winding and the ferromagnetic core. We performed measurements of acoustic emission on the traction transformers with parameters 5 MVA, 25/6 kV and 25 MVA, 110/3 kV that were in real operation. We studied the spatial distribution of the acoustical field as well as its spectra. Preliminary results have shown that acoustic analysis may be a useful alternative option for high-power transformer’s health condition.
PL
W artykule przeanalizowano diagnostykę transformatora mocy wysokiego napięcia za pomocą kamery akustycznej. Jest to jedna z podstawowych metod diagnostyki i monitoringu zdalnego z wykorzystaniem emisji akustycznej. Transformator mocy wysokiego napięcia generuje emisję akustyczną, dzięki której możemy analizować stany pracy i uszkodzenia urządzenia. W artykule przedstawiono zastosowanie kamery akustycznej do monitorowania eksploatacyjnego i diagnostyki poprzez szum pochodzący ze źródła uzwojenia transformatora i rdzenia ferromagnetycznego. Wykonaliśmy pomiary emisji akustycznej transformatorów trakcyjnych o parametrach 5 MVA, 25/6 kV i 25 MVA, 110/3 kV, które były w rzeczywistej eksploatacji.
5
Content available remote Measuring and diagnostic system for analysis of transformer insulation by return voltage method
Šimko Milan, Korenčiak Daniel, Gutten Miroslav, Janura Richard
Przegląd Elektrotechniczny
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2020
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R. 96, nr 12
67--70
EN
The first part of paper deals with the base information about diagnostics and analysis of transformer insulating system in time domain. The second part of paper deals with proposal measuring system of moisture analysis by return voltage method (RVM) for power oil transformers. RVM method is wide state specifying method which is not set in standards but in many cases is a method which is determining a clear and exact result. The results have mainly shows moisture content, content of conductive impurities in oil and degree of aging of paper insulation impact.
PL
Przedstawiono metody diagnostyki stanu izolacji transformatorów w czasie rzeczywistym. Zaproponowano nowy system diagnostyki bazujący na analizie wilgotności na podstawie napięcia powrotnego. Badania potwierdziły przydatność metody.
6
Content available remote Diagnostics of transformer insulation by frequency domain spectroscopy
Gutten Miroslav, Korenciak Daniel, Brncal Peter, Cefer Viktor
Przegląd Elektrotechniczny
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2020
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R. 96, nr 8
43--46
EN
The paper deals with the diagnostics of insulation oil-paper in high-voltage transformers by frequency diagnostic spectroscopy. 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 (RVM), method of polarization and depolarization currents (PDC) and chromatographic analysis. The second part of paper deals use of method of frequency domain spectroscopy (FDS) for high-voltage transformers with insulation oil-paper. 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 high-voltage transformer 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 high-voltage transformers.
PL
W artykule przedstawiono metody diagnostyki izolacji olejowo-papierowej w transformatorach wysokiego napięcia. Zastosowano metodę spektroskopii częstotliwościowej. Wyniki analizy znacząco zależały od temperatury pracy. Porównano wyniki dla różnych warunków pracy kilku transformatorów.
7
Content available remote Condition analysis of electrical machines by thermovision
Šebok Milan, Gutten Miroslav, Kučera Matej, Korenčiak Daniel
Przegląd Elektrotechniczny
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2020
|
R. 96, nr 8
47--50
EN
This article deals with problems of prophylactic measurement and condition of electrical machines using thermovision diagnostics. It examines the basic principles and uses non-contact temperature measurement. The knowledge of the problems of diagnostic of electrical machines in service without disassembly enables us to use more efficient thermo-diagnostic methods and to localize the failures that determine the quality of electrical wiring and equipment. The degradation of insulation materials due to temperature puts increased demands on precise knowledge of the thermal conditions in a given electrical machine. In the article are presented thermovision experimental measurements on asynchronous motor, transfer power transformer 242 kV and high-voltage generator 220 MW. Except for analysis of failures of listed power devices, thermovision technology was also used for checking of electric machines and devices for detecting of the temperature on the pick-up systems and excitation systems of generators, power parts of electric machines, detecting of the temperature differences on the semiconductor valves in individual parallel branches of equipment.
PL
W artykule zaprezentowano wykorzystanie termowizji do profilaktyki i diagnostyki maszyn elektrycznych. Metoda pozwala na ocenę stanu uzwojeń I wykrywanie błędów bez przerywania pracy urządzenia. Badano silnik asynchroniczny, transformator I generator.
8
Content available remote Analysis of automotive ignition systems in laboratory conditions
Korenciak Daniel, Kubis Matej, Sebok Milan, Gutten Miroslav, Kucera Matej
Przegląd Elektrotechniczny
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2020
|
R. 96, nr 9
48--51
EN
Paper presents basic principles and diagnostic analysis of automotive ignition system for various working and adverse states in laboratory conditions. In the first part of the paper it is examined description and importance of basic diagnostics of automotive ignition system. In the second part of paper they are described on basic principles and solution of spark plug model. In the next part of paper it is focused on proposed test laboratory device for fault simulation. In the finally, specialized measurements were made on the proposed measurement system by simulating faults by applying oil and gasoline between the electrodes and failing to make the ignition contact of the driver on the spark plug.
PL
Artykuł prezentuje laboratoryjną analizę diagnostyczną samochodowego systemu zapłonowego w różnych warunkach pracy. Dokonano przeglądu metod testowania i zaproponowano nowy system diagnostyczny. Przeprowadzono też symulację defektów.
9
Content available Fault diagnostics of transformer winding in time and frequency domain
Korenciak Daniel, Gutten Miroslav
Diagnostyka
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2020
|
Vol. 21, No. 3
49--54
EN
The paper presents basic overview of measuring methods and fault diagnostics on the power transformers and illustrating measurement on transformer winding using with methods of impact test and frequency response analysis (SFRA). Impact test and SFRA method are often used for analyzing of the insulation between coil threads or themselves of windings and for detection of the attenuated winding sections of transformers. There methods enable detecting early condition of the winding faults. In the paper is presented experimental measurement on distribution three-phase transformer 22/0.4 kV without operation by time and frequency domain by impact test and SFRA method. It was used comparison of measured curve for all phases using with mathematical statistical methods. It was found fault coil into primary winding of coil phase A.
10
Content available Analysis of insulating parameters of oil transformer by time and frequency methods
Gutten Miroslav, Kucera Matej, Brncal Peter, Sebok Milan, Korenciak Daniel
Diagnostyka
|
2020
|
Vol. 21, No. 4
51--56
EN
In the paper is presented experimental analysis and diagnostics of insulating system oil-paper for power transformers. In the first part of the paper is described base theory about measurement and diagnostics insulating part (oil and paper) of transformers. In the other two parts of the paper is presented experimental results of the diagnostic measurement for the transformer 22/0.4 kV at constant temperature. Specifically, in the second part is described measuring time method of insulating diagnostics - return voltage measurement (RVM). This method is used for analysis of condition of paper moisture of high-voltage equipment. In the third part is described measuring method of insulating frequency diagnostics - frequency domain spectroscopy (FDS). This method is used for analysis insulating condition of high-voltage equipment with insulating oil-paper. The both measuring methods are unique in terms of analysis of insulating system of oil power transformers. In comparison with other methods, the RVM and FDS methods it is possible comparison and evaluate the moisture state of the dielectric paper of the power transformer with high reliability and accurate. Their reliability in determining moisture in paper was shown by determining the same result (3.5%) on the same measured transformer.
11
Content available remote Analysis of transformer condition by frequency and time methods
Kučera Matej, Šebok Milan, Gutten Miroslav, Korenčiak Daniel, Zukowski Paweł, Koltunowicz Tomasz N.
Przegląd Elektrotechniczny
|
2019
|
R. 95, nr 9
40--43
EN
Article presents theoretical and experimental analyses of possible mechanical effect of short-circuit currents on the transformer winding by frequency and time methods. The first part of the paper is focused to mechanical influence of radial and axial forces during short-circuit. These dangerous forces cause mechanical stress in transformer. Above analysis shows that it is necessary to know the size of short-circuit current, because it represents a danger for the operation of transformer. Finally, the article presents experimental methods of diagnostics for analysis of the short-circuit forces on transformer winding by frequency method SFRA and time method – impact test.
PL
W artykule przedstawiono teoretyczne i eksperymentalne analizy, w dziedzinie czasu i częstotliwości, mechanicznego wpływu prądów zwarciowych na uzwojenie transformatora. Pierwsza część artykułu koncentruje się na mechanicznym oddziaływaniu sił promieniowych i osiowych podczas zwarcia. Te niebezpieczne dla transformatora siły powodują naprężenia mechaniczne. Przedstawiona analiza pokazuje, że konieczna jest znajomość wartości prądu zwarciowego, ponieważ stanowi on zagrożenie dla pracy transformatora. Artykuł przedstawia eksperymentalne metody diagnostyczne, wykorzystywane do analizy wpływu sił zwarciowych na uzwojenia transformatora, wykorzystujące częstotliwościową metodę SFRA i czasową – test udarowy.
12
Content available Thermal diagnostic systems and their application for analysis of transformer winding
Sebok Milan, Kucera Matej, Korenciak Daniel, Gutten Miroslav
Diagnostyka
|
2019
|
Vol. 20, No. 2
49--55
EN
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.
13
Content available Thermal and electrical analysis of automotive ignition system
Sebok Milan, Kucera Matej, Gutten Miroslav, Korenciak Daniel
Archiwum Motoryzacji
|
2019
|
Vol. 83, nr 1
113--121
EN
This article describes evaluation principles of individual parts of the ignition system, using conventional diagnostic systems, based on evaluation of current and voltage waveforms. By means of the practical test, diagnostics, measurements and subsequent analysis it was proved that thermovision plays an important role in diagnostics in on-line check automotive equipment. By comparing the non-standard warming behaviour of a part of the electrical system with combination with time highvoltage method, it is possible to diagnose a fault and also check the operating mode of the system. Sample thermogram of the temperature distribution of the ignition coils and analysis of high-voltage ignition curves with faulty spark plugs is given in the part of the paper of nondestructive diagnostics with a difference in temperature. Analysing the fault condition of ignition systems, using the method conventional diagnosis of high-voltage pulse waveforms and also the method of thermovision diagnostics, we can adequately evaluate the functionality of the electronic system and its individual components. In some cases, with one coil ignition systems, we cannot use the conventional method and therefore it is preferable to proceed to the analysis of temperature fields.
14
Content available Theory of Synthesis of Asymmetrical Delay Line with the Surface Acoustic Wave
Šimko Milan, Gutten Miroslav, Chupáč Milan, Kučera Matej, Glowacz Adam, Kantoch Eliasz, Liu Hui, Brumercik Frantisek
Archives of Acoustics
|
2019
|
Vol. 44, No. 1
117--127
EN
The aim of this publication is to design a procedure for the synthesis of an IDT (interdigital transducer) with diluted electrodes. The paper deals with the surface acoustic waves (SAW) and the theory of synthesis of the asymmetrical delay line with the interdigital transducer with diluted electrodes. The authors developed a theory, design, and implementation of the proposed design. They also measured signals. The authors analysed acoustoelectronic components with SAW: PLF 13, PLR 40, delay line with PAV 44 PLO. The presented applications have a potential practical use.
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