Abstract
The article considers the results of the analysis of autotransformers operation mode monitoring. The time diagram of active load current and oil temperature of autotransformer TashTES AT-3 is established and during one year changes of these variables and basic parameters of autotransformer were observed. Technical faults of the power transformer and high power autotransformer are established and methods of their elimination are determined. Damage of transformers and autotransformers with voltage of 110-500 kV of about 30% of the total number of outages which were accompanied by internal short-circuits and two main causes of damage were determined. The main causes of technological failures, which were not accompanied by internal short-circuits, are as follows: 20% of failures in operation of the on-load tap-changer, 16% of oil leaks from the bushings, 13% of oil leaks and lowering of oil from the transformer due to violation of welded joints and rubber seals, 4% of engine damage to oil pumps of the cooling system, 3% of pressure increase in high-voltage hermetic bushings, 2% of film protection shell damage. The main reasons of technological violations accompanied by internal short-circuit in the transformer are as follows: breakdown of internal insulation of high-voltage bushings, insufficient short-circuit resistance, wear and tear of winding insulation, breakdown of insulation.
First Page
209
Last Page
217
DOI
https://doi.org/10.51346/tstu-01.18.2.-77-0016
References
1. VaganovM.A. Transformatorы. – SPB.: Izdatelstvo SPBGETU«LETI», 2014. – 111 c.
2. Salimov J.S., Pirmatov N.B., Bekchanov B.E. Transformatorlar va avtotransformatorlar, Toshkent, Vektor – press, 2010. – 224 s.
3. Alimxodjaev K.T., Pirmatov N.B., Ziyoxodjaev T.I., Elektr mashinalari, Toshkent Fan va texnologiya, 2018. – 344 c.
4. Salimov J.S., Pirmatov N.B., Elektr mashinalari. Toshkent, O‘zbekiston faylasuflari milliy jamiyati nashriyoti, 2011, - 406s.
5. Ahmad, M. (2010). High Performance AC Drives. Modeling Analysis and Control, Springer, ISBN 978-3-642-13149-3, London, UK
6. Boldea, I. & Tutelea, L. (2010). Electric Machines. Steady State, Transients and Design with MATLAB, CRC Press, ISBN 978-1-4200-5572-6, Boca Raton, USA
7. Bose, B. (2006). Power Electronics and Motor Drives, Elsevier, ISBN 978-0-12-088405-6, San Diego, USA
8. Chiasson, J. (2005). Modeling and High-Performance Control of Electrical Machines, IEEE Press, Wiley Interscience, ISBN 0-471-68449-X, Hoboken, USA
9. De Doncker, R.; Pulle, D. & Veltman, A. (2011). Advanced Electrical Drives. Analysis, Modeling, Control, Springer, ISBN 978-94-007-0179-3, Dordrecht, Germany
10. Krause, P.; Wasynczuk, O. & Sudhoff, S. (2002). Analysis of Electric Machinery and Drive Systems (sec. ed.), IEEE Press, ISBN 0-471-14326-X, Piscataway, USA
11. Marino, R.; Tomei, P. & Verrelli, C. (2010). Induction Motor Control Design, Springer, ISBN 978-1-84996-283-4, London, UK
12. Ong, C-M. (1998). Dynamic Simulation of Electric Machinery using Matlab/Simulink, Prentice Hall, ISBN 0-13-723785-5, New Jersey, USA
13. Simion, Al.; Livadaru, L. & Lucache, D. (2009). Computer-Aided Simulation on the Reversing Operation of the Two-Phase Induction Machine. International Journal of Mathematical Models and Methods in Applied Sciences, Iss. 1, Vol. 3, pp. 37-47, ISSN 1998-0140
14. Simion, Al. (2010). Study of the Induction Machine Unsymmetrical Condition Using In Total Fluxes Equations. Advances in Electrical and Computer Engineering, Iss. 1 (February 2010), pp. 34-41, ISSN 1582-7445
15. Simion, Al. & Livadaru, L. (2010). On the Unsymmetrical Regime of Induction Machine. Bul. Inst. Polit. Iaşi, Tomul LVI(LX), Fasc.4, pp. 79-91, ISSN 1223-8139
16. Simion, Al.; Livadaru, L. & Munteanu, A. (2011). New Approach on the Study of the Steady-State and Transient Regimes of Three-Phase Induction Machine. Buletinul AGIR, Nr.4/2011, pp. 1-6, ISSN-L 1224-7928
17. R. Marino, P. Tomei, and C.M. Verrelli. A global tracking control for speed-sensorless induction motors. Automatica, 40(6):1071–1077, 2004.
18. Marino, P. Tomei, and C.M. Verrelli. Adaptive control for speed-sensorless induction motors with uncertain load torque and rotor resistance. International Journal of Adaptive Controland Signal Processing, 19(9):661–685, 2005.
19. R. Marino, P. Tomei, and C.M. Verrelli. A nonlinear tracking control for sensorlessinductionmotors. Automatica, 41(6):1071–1077, 2005.
20. Marino, P. Tomei, and C.M. Verrelli. An adaptive tracking control from current measurements for induction motors with uncertain load torque and rotor resistance. Automatica, 44(10):2593–2599, 2008.
21. Marino, P. Tomei, and C.M. Verrelli. A nonlinear tracking control for sensorless induction motors with uncertain load torque. International Journal of Adaptive Control and SignalProcessing, 22(1):1–22, 2008.
Recommended Citation
Isakov, F.S.
(2019)
"ANALYSIS OF MONITORING OF THE AT-3 AUTOTRANSFORMATOR IN TashTES MODE,"
Technical science and innovation: Vol. 2019:
Iss.
1, Article 8.
DOI: https://doi.org/10.51346/tstu-01.18.2.-77-0016
Available at:
https://btstu.researchcommons.org/journal/vol2019/iss1/8