Eng
Ukr
Rus
Print

2021 №02 (04) DOI of Article
10.37434/tdnk2021.02.05
2021 №02 (06)

Technical Diagnostics and Non-Destructive Testing 2021 #02
Technical Diagnostics and Non-Destructive Testing #2, 2021, pp. 38-45

Diagnosis of induction motors by using the influence of higher current harmonics

E.V. Demenchuk1, V.P. Shaida2, L.V. Shilkova2, O.Yu. Yurieva2
1PJSC «Ilyich Iron and Steel Works». 1 Levchenko str., 87504, Mariupol, Ukraine. E-mail: eduard.demenchuk@metinvestholding.com
2National Technical University «Kharkiv Polytechnic Institute». 2 Kyrpychova str., 61002, Kharkiv, Ukraine. E-mail: viktor.shaida@khpi.edu.ua

The questions of the influence of current harmonics of a power supply network on the work of induction electric motors in the conditions of the modern energy-intensive enterprise are considered. It is proposed to use dynamic testing to diagnose the operation of AC motors powered by the general network. The influence of frequency-regulated electric drives on the general power supply network is determined. The sinusoidal shape of the network current is distorted. The harmonious composition and magnitudes of the amplitudes of higher harmonics in the distributions of phase voltages and currents of the studied induction motors are obtained. The operation of АС motors, when powered from the general network with connected and unconnected frequency-regulated electric drives, is analyzed. The consequences of the operation of AC motors when working with the nonsinusoidal distribution of phase currents in time are revealed. Deviations in the parameters of the general network, powering the electric motors, which can lead to failure of electric machines, are determined. It is proved that when AC motors are powered from a network with frequency-regulated electric drives, there appear pulsations in the torque spectrum at frequencies that are not inherent in normal operation. Peculiarities of balancing the rotating parts of the units during operation of frequency-regulated electric drives in the general electric network are revealed. Ways to solve this problem are suggested. 11 Ref., 17 Fig.
Keywords: induction motor, dynamic testing, general power supply network, frequency-regulated electric drives, higher harmonics of current and voltage, non-sinusoidal distribution of phase currents in time, torque spectrum, balancing of rotating parts

Received: 22.03.2021

References

1. Hubarevych, O.V. (2016) Reliability and diagnostics of electrical equipment: Textbook. Severodonetsk, Vyd-vo SNU [in Ukrainian].
2. Zagirnyak, M., Mamchur, D., Kalinov, A. (2012) Comparison of induction motor diagnostic methods based on spectra analysis of current and instantaneous power signals. Przeglad Elektrotechniczny (Electrical Review), 12b, 221–224.
3. Sapena-Bano, A., Burriel-Valencia, J., Pineda-Sanchez, M., Puche-Panadero, R., RieraGuasp, M. (2017) The harmonic order tracking analysis method for the fault diagnosis in induction motors under time-varying conditions. IEEE Transact. on Energy Conversion, 32(1), 244-256. https://doi.org/10.1109/TEC.2016.2626008
4. Somka, O.O., Prus, V.V. (2015) Computerized diagnostic system for testing electrical machines for reliability. Elektrotekhnika i Elektromekhanika, 3, 27-30 [in Ukrainian]. https://doi.org/10.20998/2074-272X.2015.3.04
5. Park, B., Lee, J., Yoo, H., Jang, G. (2021) Harmonic mitigation using passive harmonic filters: Сase study in a steel mill power system. Energies 14, 2278. https://doi.org/10.3390/en14082278
6. DSTU EN 50160:2014 (EN 50160:2007, IDT) Characteristics of power supply voltage supplied by general purpose distribution networks. Kyiv, Ministry of Economic Development of Ukraine [in Ukrainian].
7. DSTU ISO 17359:2019: Machine condition monitoring and diagnostics. General guidelines [in Ukrainian].
8. Ostashevskyi, M.O., Yurieva, O.Yu. (2017) Electric machines and transformers: Textbook. Ed. by V.I. Milykh. Kharkiv, IE Panov A.M. [in Ukrainian].
9. Megger official site. https://megger.com/dynamic-motor- analyzer-baker-exp4000.
10. Rusov, V.A. (2012) Diagnosis of defects of the rotating equipment on vibration signals. Perm, RF [in Russian].
11. Volkov, I.V., Kurlchuk, M.N., Pentegov, I.V, Rymar, S. (2005). Improvement of power quality in the industrial enterprise networks by means of current filters of the supreme harmonics. Visnyk Pryazov. DTU, Pt.2: Energetyka, 15, 15– 19 [in Russian].

Advertising in this issue: