The article presents the results of a qualitative analysis of circuits of autonomous
current and voltage inverters with cut-off valves; the influence of the charge value of the switching
capacitor in parallel and series equivalent circuits on the restoration of the switching properties of
the thyristors of the inverter power circuit is studied. It is shown that due to the energy periodically
accumulated in the inductive elements of the load, the voltage on the switching capacitor in the cutoff state is greater than in a conventional parallel autonomous current inverter. This circumstance
ensures an increase in the switching stability of the inverter and therefore the circuit of an autonomous
current inverter with cut-off valves is operational in valve converters for variable-frequency electric
drives and remains operational during sudden load surges and short circuits, since the voltage value
on the switching capacitor does not depend on the load voltage value those. the charge on the
switching capacitor is maintained even when the load voltage sharply decreases between switching
the thyristors of the power circuit.
The article presents the results of a qualitative analysis of circuits of autonomous
current and voltage inverters with cut-off valves; the influence of the charge value of the switching
capacitor in parallel and series equivalent circuits on the restoration of the switching properties of
the thyristors of the inverter power circuit is studied. It is shown that due to the energy periodically
accumulated in the inductive elements of the load, the voltage on the switching capacitor in the cutoff state is greater than in a conventional parallel autonomous current inverter. This circumstance
ensures an increase in the switching stability of the inverter and therefore the circuit of an autonomous
current inverter with cut-off valves is operational in valve converters for variable-frequency electric
drives and remains operational during sudden load surges and short circuits, since the voltage value
on the switching capacitor does not depend on the load voltage value those. the charge on the
switching capacitor is maintained even when the load voltage sharply decreases between switching
the thyristors of the power circuit.
| № | Имя автора | Должность | Наименование организации |
|---|---|---|---|
| 1 | Shukhrat Badreddinovich Umarov S.B. | DSc, Professor | Tashkent State Technical University |
| № | Название ссылки |
|---|---|
| 1 | 1. M. Lalwani, D. P. Kothari, M. Singh, Investigation of Standalone Current Source Inverter for Photovoltaic System. International Journal of Physical and Mathematical Sciences Vol 3, No 1 (2012), pp. 91-97. 2. Sh. B. Umarov, D. D. Rakhmatov. Calculation of transition processes in stabilized power sources on the basis of a single-phase serial current inverter. Web of Conferences, MIP: Engineering-2020. IOP Conf. Series: Materials Science and Engineering 862 (2020) 062032 IOP Publishing doi:10.1088/1757-899X/862/6/062032 3. Khuinud Sapaev, Shukhrat Umarov, Murakam Mirsaidov, Abduvahid Ruzmatov. Ensuring the reliability of the design of a three-phase parallel inverter with shutoff valves by increasing the efficiency of its mathematical modeling. Meterials of compliance with AIP 2552, 040010 (2023); https://doi.org/10.1063/5.0111343 4. Vasil Spasov, Vanya Rangelova, Ivan Kostov, Vasil Drambalov. An Efficient Approach for Determing Inductions Motors Parametrs. Acta tehnica corviniensis – Bulletin of Engineering Tome VII [2014], pp 117-121 |
| 2 | 5. Norkhojaeva, N.N., Pirmatov, N.B., Kamalov, N.K. Mathematical model for calculating transients of a single-pole synchronous machine of longitudinally transverse excitation. E3S Web of Conferences, 2023, 402, 10041 / DOI 10.1051/e3sconf/2023402100415. Lazarev G. High-voltage converters for frequency-controlled electric drive //Electrical Engineering News, 2019, №5(119). – Pp.1-15. 6. Hongru Yu, Jianhui Su, Haining Wang, Yiding Wang, Yong Shi., Modelling method and applicability analysis of a reduced-order inverter model for microgrid applications IET Power Electron., 2020, 13, pp. 2638- 2650. 7. Zhu, S., Liu, K., Qin, L. et al.: ‘Global assessment of the asymptotic stability of three-phase inverters with saturation’, electron energy analysis., 2018, 11, (9), pp. 1556-1565 8. Shukhrat Umarov. Perhaps a critical approach to finding information about the parameters of its load, the International Russian Intellectual Property Conversion 2023 (SmartIndustryCon) | 978-1-6654-6429-1/23/$31.00 ©2023 EEEEE |
| 3 | 9. Shukhrat Umarov, Murot Tulyaganov. Peculiarities of simulation of steady modes of valve converters with periodic power circuit structure. III International Scientific and Technical Conference “Actual Issues of Power Supply Systems” (ICAIPSS2023). AIP Conf. Proc. 3152, 050004-1–050004-7; https://doi.org/10.1063/5.0218869 10. Murot Tulyaganov, Shukhrat Umarov. Improving the energy and operational efficiency of an asynchronous electric drive. III International Scientific and Technical Conference “Actual Issues of Power Supply Systems” (ICAIPSS2023). AIP Conf. Proc. 3152, 030014-1– 030014-6; https://doi.org/10.1063/5.0218876 11. Islombek Abdullabekov, Sapaev Khushnud. An Energy Efficient Control System for Water Lifting Units of the Ramadan Pumping Station Based on Frequency Controlled Electric Drives. AIP Conference Proceedings 2552, 040023, (2023), https://doi.org/10.1063/5.0130676 12. Pirmatov, N., Xaydarov, X., Abduraxmonov, S., Sayitov, S. Energy saving using a frequency converter in asynchronous motor operating modes. E3S Web of Conferences, 2024, 508, 08011 13. Islombek A. Abdullabekov, Murakam M. Mirsaidov, Odiljon O. Zaripov, Samad J. Nimatov, and Yulduz M. Eralieva. Reducing reactive energy consumption bu optimizing operating modes of irrigation pumping stations. E3S Web of Conferences 486, 06017 (2024) AGRITECH-IX 2023. https://doi.org/10.1051/e3sconf/202448606017 |
| 4 | 14. Pirmatov, N., Matqosimov, M., Mahamadjonov, S., Xolmatov, E. Investigation of transients in asynchronous generators used in microhydroelectric power plants. E3S Web of Conferences, 2024, 508, 02007 15. Islombek Abdullabekov, Murakam Mirsaidov, Furkat Tuychiev, Ravshan Dusmatov. Frequency converter – asynchronous motor – pump pressure piping system mechanical specifications. AIP Conf. Proc. 3152, 040007 (2024) https://doi.org/10.1063/5.0218880 16. Taul, M.G., Wang, X., Davari, P., et al.: ‘An overview of assessment methods for synchronization stability of grid-connected converters under severe symmetrical grid faults’, IEEE Trans. Power Electron., 2019, 34, (10), pp.9655–9670 17. Toirov, O., Ivanova, V., Tsypkina, V., Jumaeva, D., Abdullaeva, D. E3S Web of Conferences, 2023, 411, 01041. (2023). https://doi.org/10.1051/ e3sconf/ 202341101041 18. Tsypkina, V.V., Ivanova, V.P., Jurayeva, K.K. E3S Web of Conferences, 2023, 401, 03036. (2023). https://doi.org/10.1051/e3sconf/202340103036 |