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The Analysis of the Symmetrical Short-Circuit Currents in Backup Power Supply Systems with Low-Power Synchronous Generators

Author

Listed:
  • Dominik Mamcarz

    (Institute of Electromechanical Conversion, Cracow University of Technology, Warszawska 24 St., 31-155 Cracow, Poland)

  • Paweł Albrechtowicz

    (Institute of Electromechanical Conversion, Cracow University of Technology, Warszawska 24 St., 31-155 Cracow, Poland)

  • Natalia Radwan-Pragłowska

    (Institute of Electromechanical Conversion, Cracow University of Technology, Warszawska 24 St., 31-155 Cracow, Poland)

  • Bartosz Rozegnał

    (Institute of Electromechanical Conversion, Cracow University of Technology, Warszawska 24 St., 31-155 Cracow, Poland)

Abstract

This paper presents an analysis of the short-circuit currents of a synchronous generator with a rated power of 16 kVA. For this purpose, the authors carried out measurements of real short-circuit currents during laboratory tests. Additionally, a simulation model of the generator was developed according to the individual machines data from the catalog and field calculations in ANSYS Maxwell software. Based on the mentioned research, the authors compared waveforms of the symmetrical short-circuit currents. In this paper, the last compared family of short-circuit current waveforms was obtained using analytic calculations. As the presented comparison shows, the assumed method of selecting short-circuit waveforms impacted their values. However, the difference in energy related to short-circuit currents did not influence on the selection of the short-circuit protections, especially at low values of steady-state short-circuit currents and short time constants characteristic for the generators, performing the functions of an alternative power supply. Regardless of the research method, the results presented in the article show that the selection of the short-circuit protections is complicated in case of hybrid electrical systems equipped with low power generators.

Suggested Citation

  • Dominik Mamcarz & Paweł Albrechtowicz & Natalia Radwan-Pragłowska & Bartosz Rozegnał, 2020. "The Analysis of the Symmetrical Short-Circuit Currents in Backup Power Supply Systems with Low-Power Synchronous Generators," Energies, MDPI, vol. 13(17), pages 1-14, August.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:17:p:4474-:d:406473
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    References listed on IDEAS

    as
    1. Gianfranco Chicco & Andrea Mazza, 2019. "100 Years of Symmetrical Components," Energies, MDPI, vol. 12(3), pages 1-20, January.
    2. Chengliu Ai & Christopher H.T. Lee & James L. Kirtley & Yuanfeng Huang & Haifeng Wang & Zhiwei Zhang, 2019. "A Hybrid Methodology for Analyzing the Performance of Induction Motors with Efficiency Improvement by Specific Commercial Measures," Energies, MDPI, vol. 12(23), pages 1-24, November.
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    Cited by:

    1. Paweł Albrechtowicz, 2021. "Phase-Shifting Transformer Efficiency Analysis Based on Low-Voltage Laboratory Units," Energies, MDPI, vol. 14(16), pages 1-17, August.
    2. Bartosz Rozegnał & Paweł Albrechtowicz & Piotr Cisek, 2021. "A Novel Low Voltage Selective Circuit Breaker with Additional Current Path," Energies, MDPI, vol. 14(23), pages 1-14, December.
    3. Bartosz Rozegnał & Paweł Albrechtowicz & Dominik Mamcarz & Natalia Radwan-Pragłowska & Artur Cebula, 2020. "The Short-Circuit Protections in Hybrid Systems with Low-Power Synchronous Generators," Energies, MDPI, vol. 14(1), pages 1-12, December.
    4. Paweł Albrechtowicz & Jerzy Szczepanik, 2021. "The Comparative Analysis of Phase Shifting Transformers," Energies, MDPI, vol. 14(14), pages 1-16, July.

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