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Medium-Voltage AC Static Switch Solution to Feed Neutral Section in a High-Speed Railway System

Author

Listed:
  • Jose Maria Canales

    (Mondragon Goi Eskola Politeknikoa, Mondragon University, 20500 Mondragon, Spain)

  • Iosu Aizpuru

    (Mondragon Goi Eskola Politeknikoa, Mondragon University, 20500 Mondragon, Spain
    These authors contributed equally to this work.)

  • Unai Iraola

    (Mondragon Goi Eskola Politeknikoa, Mondragon University, 20500 Mondragon, Spain
    These authors contributed equally to this work.)

  • Jon Andoni Barrena

    (Mondragon Goi Eskola Politeknikoa, Mondragon University, 20500 Mondragon, Spain
    These authors contributed equally to this work.)

  • Manex Barrenetxea

    (Mondragon Goi Eskola Politeknikoa, Mondragon University, 20500 Mondragon, Spain
    These authors contributed equally to this work.)

Abstract

A high-speed train (HST) is a single-phase load supplied by a three-phase AC grid. The HST produces unbalanced three-line currents affecting the power quality of the grid. To balance the asymmetries on average, railway feeding sections are supplied that rotate the three phases of the grid. An electric isolation segment, called the neutral section (NS), between different sections is necessary. The HST must pass through this 1.6 km NS without power supply. In this paper, a medium-voltage AC static switch solution to feed the high-speed train in the NS is proposed. Thyristor technology is selected to design the 25 KVAC static switch. A medium-voltage power electronics procedure design is proposed to ensure proper operation in the final application. An NS operation is analyzed to identify impacts within the electric system and solution requirements are developed. Then, a low-scale prototype is used to experimentally validate the solution based on thyristor technology and the medium-voltage AC static switch is designed. Limitations on power and voltage at the Mondragon University Medium-Voltage Laboratory do not allow testing of the AC static switch at nominal conditions. A partial test procedure to test sections of the AC static switch is proposed and applied to validate the solution. Finally, experimental results for the Cordoba–Malaga (Spain) high-speed railway in real conditions with an HST crossing the NS at 300 km/h are shown.

Suggested Citation

  • Jose Maria Canales & Iosu Aizpuru & Unai Iraola & Jon Andoni Barrena & Manex Barrenetxea, 2018. "Medium-Voltage AC Static Switch Solution to Feed Neutral Section in a High-Speed Railway System," Energies, MDPI, vol. 11(10), pages 1-17, October.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:10:p:2740-:d:175334
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    References listed on IDEAS

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    1. Xiaoqiong He & Aiping Guo & Xu Peng & Yingying Zhou & Zhanghai Shi & Zeliang Shu, 2015. "A Traction Three-Phase to Single-Phase Cascade Converter Substation in an Advanced Traction Power Supply System," Energies, MDPI, vol. 8(9), pages 1-15, September.
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    Cited by:

    1. Si Wu & Mingli Wu & Yi Wang, 2021. "A Novel Co-Phase Power-Supply System Based on Modular Multilevel Converter for High-Speed Railway AT Traction Power-Supply System," Energies, MDPI, vol. 14(1), pages 1-17, January.
    2. Luis A. M. Barros & António P. Martins & José Gabriel Pinto, 2023. "Balancing the Active Power of a Railway Traction Power Substation with an sp-RPC," Energies, MDPI, vol. 16(7), pages 1-22, March.
    3. Anastasios Dounis, 2019. "Special Issue “Intelligent Control in Energy Systems”," Energies, MDPI, vol. 12(15), pages 1-9, August.
    4. Qiwei Lu & Bangbang He & Zhixuan Gao & Cheng Che & Xuteng Wei & Jihui Ma & Zhichun Zhang & Jiantao Luo, 2019. "An Optimized Regulation Scheme of Improving the Effective Utilization of the Regenerative Braking Energy of the Whole Railway Line," Energies, MDPI, vol. 12(21), pages 1-19, October.

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