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2014/1
Experimental study of influence of input voltage unbalance on synchronous motor
Automation, modeling and energy supply in oil and gas sector

Authors: Andrei V. EGOROV was born in 1957. He graduated from Gubkin Moscow Institute of Petrochemical and Gas Industry in 1980. He is Dean of the Faculty of Postgraduate Education Gubkin Russian State University of Oil and Gas. He is Doctor of Technical Sciences, full professor. He is author of over 130 scientific papers in the field of industrial power supply. E-mail: egorov.a@gubkin.ru
Alexander N. KOMKOV was born in 1988. He graduated from Gubkin Russian State University of Oil and Gas in 2011. He is postgraduate student of the Department of Theoretical Electrical Engineering and Electrification of Oil and Gas Industry of Gubkin Russian State University of Oil and Gas. He is author of 18 scientific papers in the field of industrial power supply. E-mail: komkov.a@gubkin.ru

Abstract: To check the adequacy of mathematical models created to simulate asymmetrical failures on the inputs of the synchronous motor and recording of instantaneous values of phase currents, voltages and current excitation a stand was crea- ted. A series of experiments to study the effects of asymmetrical modes on the performance of synchronous motor was conducted. The adequacy is confirmed experimentally.

Index UDK: 621.313.323

Keywords: asymmetric perturbations, modeling of transients, synchronous drives, elliptical magnetic field

Bibliography:
1. Ershov M.S., Egorov A.V., Komkov A.N. Vliyanie nesimmetrii pitayushchego napryazheniya na ustoychivost’ sinkhronnykh dvigateley [Effect of input voltage unbalance on the stability of synchronous motors]. Trudy Rossiyskogo gosudarstvennogo universiteta nefti i gaza imeni I.M. Gubkina [Proc. of the Gubkin russian state university of oil and gas], 2012, no. 1(266), pp. 117-128.
2.
Gamazin S.I., Stavtsev V.A., Tsyruk S.A. Perekhodnye protsessy v sistemakh promyshlennogo elektrosnabzheniya, obuslovlennye elektrodvigatel’noy nagruzkoy [Transients in industrial power systems, electric motor due to load]. Moscow, MEI Publ., 1997, 424 p.
3. Danilov A. Modern industrial current sensors. Sovremennaya elektronika, 2004, no. 1. pp. 26- 35 (in Russian).
4. Utkin A. The current sensor ACS750 firm Allegro: theory and practice. Sovremennaya elektronika, 2004, no. 12, pp. 18-21 (in Russian).

2012/1
Effect of voltage unbalance on stability of synchronous motors
Automation, modeling and energy supply in oil and gas sector

Authors: Mikhail S. ERSHOV was born in 1952; he graduated from Gubkin Moscow Institute of Petrochemical and Gas Industry in 1979. He is Head of the Department of Theoretical Electrical Engineering and Electrification of Oil and Gas Industry at Gubkin Russian State University of Oil and Gas. He is Doctor of Technical Sciences, Professor. He has published over 180 scientific papers in the field of electrical systems in the oil and gas industry. E-mail: msershov@yandex.ru
Andrei V. EGOROV was born in 1957, graduated from Gubkin Moscow Institute of Petrochemical and Gas Industry in 1980. He is Dean of the Faculty of Postgraduate Education at Gubkin Russian State University of Oil and Gas. He is Doctor of Technical Sciences, Professor. He has published over 120 scientific papers in the field of information security. E-mail: egorov.a@gubkin.ru
Alexander N. KOMKOV was born in 1988; he graduated from Gubkin Russian State University of Oil and Gas in 2011. He is post-graduate student of the Department of Theoretical Electrical Engineering and Electrification of Oil and Gas Industry at Gubkin Russian State University of Oil and Gas. He is author of 9 scientific works in the field of power industry. E-mail: komkov.a@gubkin.ru

Abstract: The range of possible combinations of values of the forward and reverse sequences of the input voltage of electrical systems with asymmetric perturbations in the external power supply is determined. It is proposed to present an elliptical magnetic field in the form of magnetic induction with varying length and speed in AC electric machines. For synchronous motors the emergence of a dynamic moment for alternating voltage unbalance is found. The range of stable operation of the synchronous motor under asymmetric modes is determined.

Index UDK: 621.313.62-83; 676.013.6-83

Keywords: asymmetric disturbances, modeling of transition-modes, synchronous drives, elliptical magnetic field, stability

Bibliography: