COMPUTER SIMULATION OF A SUPERCONDUCTING TRANSFORMER SHORT-CIRCUIT
Leszek Jaroszyński
l.jaroszynski@pollub.plLublin University of Technology, Department of Electrical Engineering and Smart Technologies (Poland)
https://orcid.org/0000-0003-1674-0970
Abstract
High critical temperature superconductor power devices have unique characteristics that reduce energy losses during transmission and distribution of electricity. These superconductors allow for high current density, enabling the construction of smaller, lighter, and more transportable installations. A superconducting transformer can significantly reduce the dynamic effects of the short-circuit current during the initial milliseconds of a fault. High temperature superconductor windings, on the other hand, are relatively lightweight and have a low heat capacity. Despite being cryogenically cooled and managing already limited current, the windings made of second-generation high-temperature superconductor can be vulnerable to thermal damage, which may occur in a relatively short timeframe. A numerical study of a short circuit in a three-phase power system with a 10 MVA 115/16.5 kV superconducting transformer is presented in this paper. The superconducting tape's nonlinear electrical and thermal characteristics, as well as heat buildup in the transformer windings during a short circuit, are all taken into consideration by the transformer model.
Keywords:
superconducting transformer, power grid, short-circuit fault, computer simulationReferences
[1] Czerwinski D. et al.: Comparison of Overcurrent Responses of 2G HTS Tapes. IEEE Transactions on Applied Superconductivity 26(3), 2016, 1–4.
Google Scholar
[2] Grilli F. et al.: Computation of Losses in HTS Under the Action of Varying Magnetic Fields and Currents. IEEE Transaction on Applied Superconductivity 24(1), 2014, 78–110.
Google Scholar
[3] Irannezhad F., Heydari H.: Conducting a Survey of Research on High Temperature Superconducting Transformers. IEEE Transactions on Applied Superconductivity 30(6), 2020, 1–13.
Google Scholar
[4] Janowski T., Wojtasiewicz G., Jaroszyński L.: Transformatory nadprzewodnikowe. Wydawnictwo Książkowe Instytutu Elektrotechniki, Warszawa 2016.
Google Scholar
[5] Jaroszyński L., Wojtasiewicz G., Janowski T.: Considerations of 2G HTS transformer temperature during short circuit. IEEE Transactions on Applied Superconductivity 28(4), 2018, 1–5.
Google Scholar
[6] Kacejko P., Machowski J.: Zwarcia w systemach elektroenergetycznych. WNT, Warszawa 2018.
Google Scholar
[7] Kalsi S. S.: High temperature superconductors to electric power equipment. IEEE Press. Wiley, Hoboken, New Jersey 2011.
Google Scholar
[8] Marchionini B. G. et al.: High-Temperature Superconductivity: A Roadmap for Electric Power Sector Applications. IEEE Transaction on Applied Superconductivity 27(4), 2017, 1–7.
Google Scholar
[9] Noe M.: Superconducting Transformers. EUCAS 2017 Short Courses: Superconducting Power Applications. Switzerland, Geneva, 2017.
Google Scholar
[10] Pi W. et al.: Fault Current Characteristics of Parallel Stainless Steel & REBCO Tapes and a 6 kV/400 V HTS Transformer. IEEE Transaction on Applied Superconductivity 31(5), 2021, 1–6.
Google Scholar
[11] Surdacki P., Jaroszyński L., Woźniak Ł.: Modelling short-circuit current of a 21 MVA HTS superconducting transformer. Journal of Physics: Conference Series 1782, 2021, 012036.
Google Scholar
Authors
Leszek Jaroszyńskil.jaroszynski@pollub.pl
Lublin University of Technology, Department of Electrical Engineering and Smart Technologies Poland
https://orcid.org/0000-0003-1674-0970
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