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INCREASING THE EFFICIENCY OF POWER AUTOTRANSFORMERS

DOI: 10.47026/1810-1909-2023-2-138-150

УДК 620.9

ББК 39.462.28

Maksim G. POPOV, Denis E. PETRUSHIN, Olga A. VASILYEVA

Key words

power equipment, autotransformers, energy efficiency, energy saving, cooling system

Abstract

The issues of implementing effective measures to reduce losses during the operation of power electrical equipment are of particular practical interest for electric grid and industrial enterprises. It is known that power transformers have a fairly high coefficient of performance (COP) in nominal (and close to them) modes. The efficiency of autotransformers largely depends on the distribution of the load between the medium and low voltage windings due to design features. With this in mind, the purpose of this study is the calculation substantiation of new ways to improve the energy efficiency of 330 kV power autotransformers. The research methodology consists in obtaining the calculated characteristics of losses in power autotransformers with a rated power of 125 MVA and assessing the impact on the efficiency of loading their windings. In the Result of Research section, design characteristics analysis is made and the optimal ratio of the loads of medium and low voltage windings is determined. Also, the paper explored and, as a result of calculations, justified a method for increasing the energy efficiency of autotransformers. The effect of reducing operating losses on the electric drives of pumps and fans of forced cooling systems was achieved by optimizing their operation. Conclusions outline the most significant practical results for improving the energy efficiency of autotransformers of the ATDTSTN-125000/220/110-U1 brand installed at the 330 kV Loukhi substation. It has been established that with energy-efficient power distribution between medium and low voltage windings, losses can be reduced by up to 133 kW. Optimization of energy consumption in the forced cooling system ATDCTN-125000/220/110-U1 is characterized by reduction in operational power losses of about 48 kW. The methods and mathematical models proposed in the study have been prepared for their approbation in the field conditions of trial operation at the 330 kV Loukhi substation.

References

  1. Ananicheva S.S., Shelyug S.N. Elektroenergeticheskie sistemy i seti [Electric power systems and networks]. Ekaterinburg, Ural University Publ., 2019, 296
  2. Bez”yazychnyi V.S., Kostinskii S.S., Troitskii A.I. Issledovanie rezhimov raboty silovykh dvukhobmotochnykh transformatorov raspredelitel’nykh setei metodom uslovno postoyannykh koeffitsientov v zavisimosti ot ikh nagruzki [Investigation of operating modes of power double-winding transformers of distribution networks by the method of conditionally constant coefficients depending on their load]. In: Kibernetika energeticheskikh sistem: sb. materialov XLI Mezhdunar. nauch.-tekhn. konf. [Proc. of the XLI Int. Sci. and Techn. Conf. «Cybernetics of energy systems»]. Novocherkassk: SURPU (NPI) Publ., 2020, pp. 89–93.
  3. Bogdanov S.N., ed., Bogdanov S.N., Burtsev S.I., Ivanov O.P., Kupriyanova A.V. Kholodil’naya tekhnika. Konditsionirovanie vozdukha. Svoistva veshchestv. 4-e izd. [Refrigeration equipment. Air conditioning. Properties of substances. 4th]. St. Petersburg, 1999, 320 p.
  4. Vanin V.K., Goryachevskii K.S., Zaboin V.N. Identifikatsiya parametrov silovykh transformatorov v adaptivnykh sredstvakh ikh zashchity i avtomatiki [Identification of parameters of power transformers in adaptive means of their protection and automation]. Izvestiya NTTs Edinoi energeticheskoi sistemy, 2018, no. 2(79), pp. 118–130.
  5. Ermakov V.F. Blok-skhema intellektual’nykh mikroprotsessornykh sistem sbora dannykh dlya provedeniya energoaudita v elektricheskikh setyakh sistem elektrosnabzheniya [Block diagram of intelligent microprocessor data acquisition systems for energy audit in electrical networks of power supply systems]. In: Rezul’taty issledovanii – 2017: materialy III Natsional’noi konf. professorsko-prepodavatel’skogo sostava i nauch. rabotnikov [Proc. of III National Conf. «Research Results – 2017»]. Novocherkassk: SURPU (NPI) Publ., 2017, 56–58.
  6. Zasypkin A.S. Povyshenie tekhnicheskogo sovershenstva releinoi zashchity moshchnykh transformatorov energosistem: dis. … d-ra tekh. Nauk. T. 2. Prilozheniya: [Improving the technical perfection of relay protection of high-power transformers of power systems: Doct. Diss. Vol. 2: Application]. Novocherkassk, 1983, 223 p.
  7. Zasypkin A.S. Soprotivleniya transformatorov, reguliruemykh pod nagruzkoi [Resistance of transformers regulated under load]. Izvestiya vysshikh uchebnykh zavedenii. Elektromekhanika, 2020, vol. 63, no 4. pp. 63–69.
  8. Ivakin V.N., Kovalev V.D., Magnitskii A.A. Normirovanie energoeffektivnosti raspredelitel’nykh transformatorov [Rationing of energy efficiency of distribution transformers]. Energiya edinoi seti, 2017, no 5, pp. 20–29.
  9. Komplektuyushchie i zapchasti k silovym transformatoram. OOO «Lider-energo» [Accessories and spare parts for power transformers. Leader-Energo LLC]. Available at: https://lider-energo.ru.
  10. Merkur’ev G.V., Tsirel’ Ya.A. Raschety rezhimov raboty transformatorov [Calculations of operating modes of transformers]. St. Petersburg, 2004, 38 p.
  11. Mogilenko A.V. Novye trebovaniya k transformatoram [New requirements for transformers]. Energetika i promysh-lennost’ Rossii, 2015, no. 12(272), p. 37.
  12. Osipov D.S. Uchet nagreva tokovedushchikh chastei v raschetakh poter’ moshchnosti i elektroenergii pri nesinusoidal’nykh rezhimakh sistem elektrosnabzheniya: dis. … kand. techn. nauk [Taking into account the heating of current-carrying parts in the calculations of power and electricity losses in non-sinusoidal modes of power supply systems: Cand. Diss.]. Omsk, 2005, 152 p.
  13. Petrushin D.E., Savel’ev R.K., Koryakin D.D. Opredelenie optimal’nogo rezhima raboty sistemy okhlazhdeniya silovogo avtotransformatora [Determination of the optimal mode of operation of the cooling system of the power autotransformer]. In: Zavalishinskie chteniya ’16. Molodezhnaya sektsiya [Zavalishinsky readings ’16. Youth section]. St. Peterburg: SUAI Publ., 2016, pp. 121–125.
  14. Petrushin D.E., Savchenko N.N., Belyakov Yu.S. Raschet poter’ v silovom avtotransformatore, opredelenie optimal’nogo rezhima raboty [Calculation of losses in a power autotransformer, determination of the optimal operating mode]. In: Materialy 66-i Vseros. (s mezhdunar. uchastiem) nauch. konf. obuchayushchikhsya i molodykh uchenykh [Proc. of the 66th (with International Participation) Sci. Conf. of students and young scientists]. Petrozavodsk: PetrSU Publ., 2014, pp. 464–465.
  15. Popov M.G., Vanin V.K., Zaboin V.N., Gurevich E.I. Identifikatsiya parametrov silovogo elektrooborudovaniya v adaptivnykh sredstvakh zashchity i protivoavariinoi avtomatiki [Identification of parameters of power electrical equipment in adaptive means of protection and emergency automation]. Izvestiya vysshikh uchebnykh zavedenii. Elektromekhanika, 2018, vol. 61, no 6, pp. 68–76.
  16. Serebryakov A.S., ed., Serebryakov A.S., Osokin V.L., Semenov D.A., Zhuzhin M.S. Tekhnika vysokikh naprya-zhenii. Izolyatsiya elektricheskikh ustanovok vysokogo napryazheniya [High voltage technique. Isolation of high voltage electrical installations]. Staryi Oskol, 2021, 448 p.

Information about the authors

Maksim G. Popov – Doctor of Technical Sciences, Professor of the Higher School of High-Voltage Energy, Peter the Great St. Petersburg Polytechnic University, Russia, St. Petersburg; Professor, Department of Energy Supply of Enterprises and Energy Saving, Petrozavodsk State University, Russia, Petrozavodsk (popovmg@eef.spbstu.ru; https://orcid.org/0000-0003-1621-9755).

Denis E. Petrushin – Chief Specialist, Electrical Modes Service, Karelian Regional Dispatching Office, a Branch of System Operator of the United Power System; Senior Lecturer, Department of Energy Supply of Enterprises and Energy Saving, Petrozavodsk State University Russia, Petrozavodsk (petrushind@petrsu.ru; https://orcid.org/0000-0002-3272-8210).

Olga A. Vasilyeva – Candidate of Technical Sciences, Associate Professor of the Higher School of High-Voltage Energy, Peter the Great St. Petersburg Polytechnic University, Russia, St. Petersburg (vasilieva_oa@spbstu.ru).

For citations

Popov M.G., Petrushin D.E., Vasilyeva O.A. INCREASING THE EFFICIENCY OF POWER AUTOTRANSFORMERS. Vestnik Chuvashskogo universiteta, 2023, no. 2, pp. 138–150. DOI: 10.47026/1810-1909-2023-2-138-150 (in Russian).

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