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A Comprehensive Evaluation of Different Power Quantities in DC Electric Arc Furnace Power Supplies

Author

Listed:
  • Pegah Hamedani

    (Department of Railway Engineering & Transportation Planning, University of Isfahan, Isfahan 8174673441, Iran)

  • Cristian Garcia

    (Department of Electrical Engineering, Universidad de Talca, Curico 3340000, Chile)

  • Jose Rodriguez

    (Faculty of Engineering, Universidad San Sebastian, Santiago 4080871, Chile)

Abstract

Conventionally, DC arc furnaces are fed by thyristor rectifiers to control the level of current or power transferred to the load. With the advancement of high-power transistors, other structures such as diode rectifiers and DC choppers have been introduced and developed for the feeding system of DC electric arc furnaces. In this paper, the effect of different power supply systems on power quality indexes is discussed. In this regard, two types of feeding systems are considered, including a power supply system based on thyristor rectifiers and a power supply system based on diode rectifiers and DC choppers. In addition, different control methods, including constant current control (CCC) and constant power control (CPC), on DC electric arc furnaces are applied. For evaluating the power quality indexes, voltage and current harmonic distortion, unbalance of voltage and current, and power factor on the AC side are investigated for different power supply systems. Simulation results were performed with PSCAD/EMTDC software. It is shown that the power supply systems with diode rectifiers and DC choppers have superiority in comparison to the types based on thyristor rectifiers. According to the results, the average current THD is reduced from 16.55% in the thyristor rectifier to 8.40% in the chopper rectifiers with the CCC method and from 19.27% in the thyristor rectifier to 7.38% in the chopper rectifiers with the CPC method. Moreover, the average voltage THD is reduced from 5.67% in the thyristor rectifier to 3.02% in the chopper rectifiers with the CCC method. The result is similar to the CPC method. Furthermore, for a specific power supply system, the harmonic distortion is lower in the case of the CPC method than in the CCC method.

Suggested Citation

  • Pegah Hamedani & Cristian Garcia & Jose Rodriguez, 2023. "A Comprehensive Evaluation of Different Power Quantities in DC Electric Arc Furnace Power Supplies," Energies, MDPI, vol. 16(9), pages 1-24, May.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:9:p:3888-:d:1139314
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    References listed on IDEAS

    as
    1. Zbigniew Olczykowski & Zbigniew Łukasik, 2021. "Evaluation of Flicker of Light Generated by Arc Furnaces," Energies, MDPI, vol. 14(13), pages 1-23, June.
    2. Zbigniew Łukasik & Zbigniew Olczykowski, 2020. "Estimating the Impact of Arc Furnaces on the Quality of Power in Supply Systems," Energies, MDPI, vol. 13(6), pages 1-30, March.
    3. Zbigniew Olczykowski, 2022. "Arc Voltage Distortion as a Source of Higher Harmonics Generated by Electric Arc Furnaces," Energies, MDPI, vol. 15(10), pages 1-23, May.
    4. Zbigniew Olczykowski, 2021. "Electric Arc Furnaces as a Cause of Current and Voltage Asymmetry," Energies, MDPI, vol. 14(16), pages 1-18, August.
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