140008, Pavlodar city, Lomov street, 64, Phone number: 8 (7182) 67-36-85 Fax: 8 (7182) 67-37-02 Selection committee: 8 (7182) 67-37-73 E-mail: pgu@tou.edu.kz
URN AP14972779 “Improving the protection of a three-phase transformer from inter-winding faults, taking into account its nonlinearity”
URN AP14972779 “Improving the protection of a three-phase transformer from inter-winding faults, taking into account its nonlinearity”
Implementation period: 20.10.2022-31.12.2024
At present time, maximum current, differential and gas protection are used to protect transformers. Current protections are insufficiently sensitive to inter-winding faults and are not able to turn off the transformer at the initial moment of damage. Gas protection cannot be used on “dry” transformers, and its response time during an inter-winding fault strongly depends on the oil temperature at the time of the accident and the number of closed turns and can be 0.1-1.0 s. In this regard, the amount of damage to the transformer reaches serious proportions when the cost of its repair is comparable to the cost of a new transformer.
Protections built on magnetic current transformers have an advantage over classical protections. A significant contribution to the development of the theory and implementation of protections on MCT was made by Chechushkov G.A., Siniche Kudze, Zasypkin A.S., Gagen A.F., Pyastolov A.A., Novozhilov A.N., and many of their colleagues. However, their developed protections have disadvantages due to the presence of insensitivity zones to winding damage.
Project goal: The goal of the project is to develop protection of three-phase three-winding transformers from short circuits in the windings
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Expected and achieved results: |
Results achieved during the 1st year of research |
Results achieved during the 2nd year of research |
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For 2022: a search and in-depth analysis of all available information on the issue of transformer protection has been carried out, and the method for modeling stray magnetic fields of transformer windings between the rods will be improved, taking into account the nonlinearity of the magnetic circuit for the needs of relay protection with sufficient accuracy for it.
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Articles in leading peer-reviewed scientific publications (journals) recommended by Committee for Quality Assurance in the Field of Science and Higher Education of the Ministry of Science and Higher Education of the Republic of Kazakhstan:
1) Modeling of the EMF of the MCT located between the core rods of a power transformer / Kolesnikov E.N., Novozhilov A.N., Rakhimberdinova D.M., Novozhilov T.A. // Bulletin of Toraighyrov University. Energetics Series. – 2022. – No. 4. – P. 187-195.
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Articles in leading peer-reviewed scientific publications (journals) recommended by Committee for Quality Assurance in the Field of Science and Higher Education of the Ministry of Science and Higher Education of the Republic of Kazakhstan:
1) Improving the method for determining resistance and currents in a low-voltage circuit during arc faults / D. M. Rakhimberdinova, A. N. Novozhilov, E. N. Kolesnikov, T. A. Novozhilov // Bulletin of Toraighyrov University. Energetics Series. – 2023. – No. 1. – P. 289-301
2) Design features of magnetic current converters / D. M. Rakhimberdinova, A. N. Novozhilov, E. N. Kolesnikov, N.Sh Zhumataev, T. A. Novozhilov // Bulletin of Toraigyrov University. Energy Series. – 2023. – No. 2. – P. 304-313
3) Magnetic current converter with two magnetic circuits / D. M. Rakhimberdinova, A. N. Novozhilov, E. N. Kolesnikov, N.Sh Zhumataev, T. A. Novozhilov // Bulletin of Toraighyrov University. Energetics Series. – 2023. – No. 3. – P. 145-153 |
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In 2023, the method for modeling stray magnetic fields of transformer windings between the rods was improved, taking into account the nonlinearity of the magnetic circuit for the needs of relay protection with sufficient accuracy for it. An experimental setup has been developed. The method for modeling the stray magnetic fields of transformer windings on a rod has been improved, taking into account the nonlinearity of the magnetic circuit for the needs of relay protection with sufficient accuracy for it. The mathematical model of a three-phase three-winding transformer has been improved, making it possible to simulate currents in the windings in steady-state and transient modes of normal, abnormal and emergency types, taking into account the nonlinearity of the magnetic circuit with an accuracy that meets the needs of relay protection. 2 articles will be published in peer-reviewed foreign and (or) domestic publications recommended by Committee for Quality Assurance in the Field of Science and Higher Education of the Ministry of Science and Higher Education of the Republic of Kazakhstan. Based on the results of the study, an article will be published in a journal in the first three quartiles by impact factor in the Web of Science database or having a CiteScore percentile in the Scopus database of at least 50.
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Articles in republican and foreign international scientific conferences:
1) Analysis of the design features of short networks at ore-thermal production / Rakhimberdinova D.M., Kolesnikov E.N. // Technical sciences: problems and solutions: collection of articles based on the materials of the LXVII international scientific and practical conference. - Moscow. – 2022. – No. 12(62). – P.48-56.
2) Analysis of the influence of ferromagnetic transformer elements on the distribution of magnetic stray fields of windings / Rakhimberdinova D.M.,
Kolesnikov E.N. // Technical sciences: problems and solutions: collection of articles based on the materials of the LXVII international scientific and practical conference. - Moscow. – 2022. – No. 12(62). – P.43-48.
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Articles in republican and foreign international scientific conferences:
1) Magnetic current converter on a reed switch / Zhumataev N. Sh., Rakhimberdinova D. M., Kolesnikov E. N., Isenov Zh. S. // Technical sciences: problems and solutions: collection of articles based on the materials of the LXXVI international scientific and practical conference . - Moscow. – 2023. – No. 9(70). – P.43-48
2) Kolesnikov E.N. Modeling of inter-winding fault in the secondary windings of a three-phase three-winding transformer / E.N. Kolesnikov, D.M. Rakhimberdinova, Zh. Isenov // Technical sciences: problems and solutions: collection. Art. based on materials from the LXXVII International Scientific and Practical Conference “Technical Sciences: Problems and Solutions.” – No. 10(71). – M., Pub. "Internauka", 2023. |
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For 2024: the mathematical model of a three-phase three-winding transformer will be improved, allowing to simulate currents in the windings during an inter-winding fault in the primary or secondary winding, taking into account the nonlinearity of the magnetic circuit with an accuracy that meets the needs of relay protection. The protection on the MCT from electrical damage to the windings of a three-phase three-winding asymmetric transformer will be improved and the design of element fastenings will be developed. Design documentation for the protection cabinet will be developed to implement protection on the MCT from electrical damage to the windings of a three-phase three-winding asymmetric transformer, and a SCADA shell will be developed for the HMI panel of the protection cabinet on the MCT. A prototype of an MCT protection system against electrical damage to the windings of a three-phase three-winding asymmetric transformer will be manufactured, and research will be carried out with its help. Based on the results of the study, an article will be published in a peer-reviewed foreign journal in the first three quartiles by impact factor in the Web of Science database or having a CiteScore percentile in the Scopus database of at least 50, as well as 2 articles in peer-reviewed foreign and (or) domestic publications recommended by K Committee for Quality Assurance in the Field of Science and Higher Education of the Ministry of Science and Higher Education of the Republic of Kazakhstan. The expected results will be published in the collection of materials of the international conference. A patent for the invention will be obtained from the Russian patent bureaus. |
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Members of the research group:
Evgeniy Nikolaevich Kolesnikov 09.04.1989
Scientific supervisor of the project
PhD
Main place of work: postdoctoral fellow at the Department of Electrical Engineering and Automation
NJSC "Toraighyrov University"
Area of scientific interests:
- relay protection of transformers.
Scopus Author ID: 57198003176
ORCID: 0000-0002-2334-5146
List of publications and patents:
Novozhilov A.N., Kolesnikov E.N., Isupova N.A. and others. Analysis of methods for modeling switching transient processes in electrical networks with an isolated neutral // Electrical engineering. – 2013. – No. 1. – P. 7-10.
Novozhilov A.N., Kolesnikov E.N., Isupova N.A. and others. Modeling of switching transient processes in electrical networks with an isolated neutral // Bulletin of PSU. – 2010. – No. 4. – pp. 67-74.
Novozhilov A.N., Kolesnikov E.N., Volgina E.M. and others. Modeling the operation of a three-phase three-winding transformer // Bulletin of PSU. – 2019. – No. 2. – P. 62-75.
Volgina E., Novozhilov A., Kolesnikov E. et al. Simulation of three-phase transformer operational conditions // News of the national academy of Sciences of the Republic of Kazakhstan. – 2019. – Vol. 5(437). – P. 26-33.
Novozhilov A.N., Novozhilov T.A., Kolesnikov E.N. Modeling of currents in the windings of a three-phase three-winding transformer with a turn circuit // Technical sciences: problems and solutions: materials of the 22nd International scientific-practical conference – M., 2019. – P. 149-160.
Novozhilov A.N., Kolesnikov E.N., Novozhilov T.A. Modeling of an inter-winding fault in the windings of a three-phase three-winding transformer // Electrical engineering. – 2020. – No. 12. – pp. 20-24.
Novozhilov A.N., Kolesnikov E.N., Novozhilov T.A. Coil Shorting Simulation in the Windings of a Triple-Phase Three-Winding Transformer // Russian Electrical Engineering. – 2020. – Vol. 91(4). – P. 737-741.
Novozhilov A.N., Novozhilov T.A., Kolesnikov E.N. Modeling of a turn circuit in the secondary windings of a three-phase three-winding transformer // Mater. international scientific-practical conf. "XI Toraighyrov Readings". – Pavlodar, 2019. – pp. 187-195.
Novozhilov A.N., Novozhilov T.A., Kudabaev D.A., Kolesnikov E.N. Modeling of ground fault currents in the stator winding of an asynchronous motor in a network with an insulated neutral // Electrical engineering. – 2013. – No. 2. – pp. 38-42.
Novozhilov A.N., Kudabaev D.A, Kolesnikov E.N. Methods for modeling fault currents on the frame of an asynchronous motor in a network with an isolated neutral // Electromechanical energy converters: material. 5th anniversary. international scientific-technical conf. – Tomsk, 2011. – P. 43-53.
Novozhilov A.N., Novozhilov T.A., Kolesnikov E.N. Methods for modeling single-phase fault currents on the body with an isolated neutral // Internauka. – 2020. – No. 10(139), part 2. – P. 8-10.
Novozhilov A.N., Kolesnikov E.N., Isupova N.A., Kudabaev D.A. Analysis of modeling os switching transients in electrical networks with an isolated neutral // Russian Electrical Engineering. – 2013. – Vol. 84(1). – P. 6-8.
Novozhilov A.N., Kolesnikov E.N., Novozhilov T.A. et al. Simulation of fault-to-ground currents in the winding of an asynchronous motor stator in a network with insulated neutral // Russian Electrical Engineering. – 2013. – Vol. 84(2). – P. 89-93.
Novozhilov A.N., Novozhilov T.A., Volgina E.M., Kolesnikov E.N. et al. Magnetic field scattering of a transformer winding on a round rod for a safety relay // Russian Engineering Research. – 2020. – No. 9. – P. 710-714.
Novozhilov A.N., Novozhilov T.A., Kolesnikov E.N. and others. Modeling of stray magnetic fields of transformer windings on a round rod for relay protection // Bulletin of Mechanical Engineering. – 2020. – No. 6. – pp. 12-15.
Innov. Pat. 27096 RK., IPC N02N 7/04. Device for protecting a symmetrical three-phase transformer from electrical damage to windings / Novozhilov A.N., Neftisov A.V., Kolesnikov E.N.; publ. 14.06.13, Bulletin. No. 6. – 3 s.
Innov. Pat. No. 26738 RK. IPC N02N 7/04. Device for protecting a three-phase transformer from winding short circuits / Novozhilov A.N., Novozhilov T.A., Kolesnikov E.N. and etc.; publ. 15.03.13, Bulletin. No. 3. – 3 s.
Alexander Nikolaevich Novozhilov
Scientific consultant
Doctor of Technical Sciences, Professor
Main place of work: Professor of the Department of Electrical Power Engineering
NJSC "Toraighyrov University"
Area of scientific interests:
- Relay protection of electrical power systems and power supply systems.
Scopus Author ID: 7003623335
List of publications and patents:
The following publications are available in the area of the project: 41 articles in journals indexed in the Scopus database; more than 100 patents of the Republic of Kazakhstan and the Russian Federation. H-index 5 (https://www.scopus.com/authid/detail.uri?authorId=7003623335).