42

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  • DOI
  • Date of creation in the UzSCI system 16-08-2024
  • Read count 42
  • Date of publication 14-08-2024
  • Main LanguageIngliz
  • Pages58-64
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English

Possible modes of ferroresonance in three-phase electric networks and analysis of
substitution schemes where ferroresonance voltage increase is observed are considered. The most
complete magnetization curve of the transformer core and the analysis of the generalized equivalent
substitution scheme are presented, as a result of which more accurate formulas for determining the
values of equivalent parameters of the electrical network and voltage transformer in ferroresonance
mode are obtained. Factor of ferroresonance voltage increase is introduced, which determines ratio
between amplitude values of transformer phase voltage and mains voltage. The method of
determination of boundary conditions of steady ferroresonance voltage increase is given on the
example of calculation of energy-saving three-phase double-winding voltage transformer of TMG12-
250/15 grade, as an important factor of reliable operation of electric network. The results obtained
can be applied to the analysis of ferroresonance in power supply systems of both low and high voltage.
 

№ Author name position Name of organisation
1 Begmatov S.E. PhD, Professor, Tashkent State Technical University
№ Name of reference
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4 13. B.A.Abdullaev, Sh.E.Begmatov, D.Khalmanov, S.A. Dusmukhamedova Generalized mathematical models of nonlinear passive elements for the research of ferroresonance in electrical networks. Technical science and innovation. TSTU- Tashkent, 2021. №2.- p.115-123. 14. Sh.E.Begmatov. Method for determining the boundary conditions of ferroresonant over voltages in electrical networks. KSTU named after T.F.Gorbachev. VII International Scientific and Practical conference "Energy and Energy Saving: Theory and Practice". Kemerovo, December 7-9, 2022., in press. 15. Begmatov Sh. Research of Ferroresonance in 6-35 kV Electrical Networks Taking Into Account the Dynamic Model of Non-Linear Inductivity of Power Transformer // Proceedings of International Conference on Applied Innovation in ITVolume 11, Issue 1, 2023, Pages 273-27711th International Conference on Applied Innovations in IT, ICAIIT 2023; Koethen; Germany; 9March 2023; http://dx.doi.org/10.25673/101949
5 16. Sh.E.Begmatov Calculation of active power losses taking into account the nonlinear inductance of the voltage transformer // TECHNICAL SCIENCE AND INNOVATION. № 3/2023. 137-144р. Tashkent State Technical University University. 17. Sh. Begmatov et al. Analysis of ferroresonance in 6-35 kV electric networks including dynamic model of non-linear inductivity of power transformer // Cite as: AIP Conference Proceedings 2552, 040011 (2023); https://doi.org/10.1063/5.0130666 Published Online: 05 January 2023. 18. Tugai I. Yu. Determination of the presence of conditions for the occurrence of a ferroresonance process in high-voltage electrical networks / I. Yu. Tugai // Proceedings of the Institute of Electrodynamics of the National Academy of Sciences of Ukraine. – 2014. – Issue. Thirty-ninth – pp. 9 – 12.
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9 26. Organization Standart 56947007- 29.240.10.248. Norms of technological design of 35–750 kV AC substations. – М.: PJSC “FSC UES”, 2017. – 135 p. 27. Guidelines for protection against resonant overvoltages in 6-750 kV electrical installations. Russia 2014.-33 p. 28. (https://powersystem.info/index.php/ Reference_data_of_parameters_of_transformers_from_35 _kV)
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