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Practical Experiments with a Ready-Made Strategy for Energizing a Suitable Pre-Magnetized Three-Column Three-Phase Dy Transformer in Unloaded State for Inrush Current Computations

Author

Listed:
  • Marian Łukaniszyn

    (Department of Drive Automation and Robotics, Faculty of Electrical Engineering, Automatic Control and Informatics, Opole University of Technology, Prószkowska Street 76, 45-272 Opole, Poland)

  • Łukasz Majka

    (Department of Electrical Engineering and Computer Science, Faculty of Electrical Engineering, Silesian University of Technology, Akademicka Street 10, 44-100 Gliwice, Poland
    These authors are participants in research fellowship at Opole University of Technology.)

  • Bernard Baron

    (Department of Drive Automation and Robotics, Faculty of Electrical Engineering, Automatic Control and Informatics, Opole University of Technology, Prószkowska Street 76, 45-272 Opole, Poland)

  • Marcin Sowa

    (Department of Electrical Engineering and Computer Science, Faculty of Electrical Engineering, Silesian University of Technology, Akademicka Street 10, 44-100 Gliwice, Poland
    These authors are participants in research fellowship at Opole University of Technology.)

  • Krzysztof Tomczewski

    (Department of Drive Automation and Robotics, Faculty of Electrical Engineering, Automatic Control and Informatics, Opole University of Technology, Prószkowska Street 76, 45-272 Opole, Poland)

  • Krzysztof Wróbel

    (Department of Drive Automation and Robotics, Faculty of Electrical Engineering, Automatic Control and Informatics, Opole University of Technology, Prószkowska Street 76, 45-272 Opole, Poland)

Abstract

This article presents the results of an experimental verification of three-phase Dy transformer dynamics under no-load conditions. This study is motivated by previous ferroresonance analyses where the occurrence of inrush currents has been observed. The measurements covered all available electrical quantities in a transient state (12 measured and 3 additionally computed waveforms) during the device’s start-up under no-load conditions, as well as in a long-term steady state. A detailed analytical analysis is carried out for the obtained comprehensive set of measurement results. As a result of the conducted research, the mathematical model of the pre-magnetized three-phase Dy transformer is modified. Particular attention is paid to the issue of residual magnetism of the transformer core and its consideration in further research. The original strategy for energizing a three-column three-phase Dy transformer with a suitable pre-magnetization of its columns and original control switching system with a given/set value of the initial phase in the supply voltage is put to the test. The evolution of the induced inrush phenomenon up to the quasi-steady state under given (forced) conditions is documented (currents, voltages and the dynamics of changes taking place in the core (hysteresis loops)). This article represents a continuation of ongoing work on the study of transient states (dynamics of transformer inrush currents). At present, the Dy three-phase transformer is analyzed because of the requirements of industrial operators.

Suggested Citation

  • Marian Łukaniszyn & Łukasz Majka & Bernard Baron & Marcin Sowa & Krzysztof Tomczewski & Krzysztof Wróbel, 2024. "Practical Experiments with a Ready-Made Strategy for Energizing a Suitable Pre-Magnetized Three-Column Three-Phase Dy Transformer in Unloaded State for Inrush Current Computations," Energies, MDPI, vol. 17(10), pages 1-22, May.
    • Handle: RePEc:gam:jeners:v:17:y:2024:i:10:p:2298-:d:1391790
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    References listed on IDEAS

    as
    1. Lewandowski, M. & Walczak, J., 2015. "Analysis of the impact of interpolator’s order on the accuracy of electric current spectrum estimation method in the presence of noise," Applied Mathematics and Computation, Elsevier, vol. 267(C), pages 554-561.
    2. Srđan Divac & Marko Rosić & Stan Zurek & Branko Koprivica & Krzysztof Chwastek & Milan Vesković, 2023. "A Methodology for Calculating the R - L Parameters of a Nonlinear Hysteretic Inductor Model in the Time Domain," Energies, MDPI, vol. 16(13), pages 1-14, July.
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