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Connection and Control Strategy of PV Converter Integrated into Railway Traction Power Supply System

Author

Listed:
  • Peng Cheng

    (China Institute of Energy and Transportation Integrated Development, North China Electric Power University, Beijing 102206, China)

  • Chao Wu

    (Department of Energy Technology, Aalborg University, DK 9220 Aalborg, Denmark)

  • Huiwen Kong

    (China Institute of Energy and Transportation Integrated Development, North China Electric Power University, Beijing 102206, China)

  • Frede Blaabjerg

    (Department of Energy Technology, Aalborg University, DK 9220 Aalborg, Denmark)

  • Yu Quan

    (College of Automation, Hangzhou Dianzi University, Hangzhou 310018, China)

Abstract

In order to supply the single-phase locomotive load and mitigate the negative sequence current, this paper develops a V/V transformer-based connection and control strategy of three-phase photovoltaic (PV) converters integrated into railway traction power supply systems. In this V/V transformer-based connection, the two-phase traction voltage is converted into the three-phase voltage. This approach can offer a common low voltage AC bus, which is more convenient for more access to three-phase PV converters. Based on this V/V transformer-based connection, an individual phase current control strategy with the hybrid current reference is fully designed. In this control strategy, the current reference, containing two parts, is generated. One is the asymmetrical part for powering the single-phase locomotive load and mitigating the negative sequence current. The other is the symmetrical part for feeding the surplus power back to the utility grid. Then, each phase current replaces the dual-sequence current to be controlled to track the corresponding phase current reference. Consequently, PV converters can flexibly inject the symmetrical and asymmetrical currents without the dual-sequence extraction for a simpler implementation. Finally, the effectiveness of the developed connection and control strategy is validated by the simulation studies.

Suggested Citation

  • Peng Cheng & Chao Wu & Huiwen Kong & Frede Blaabjerg & Yu Quan, 2020. "Connection and Control Strategy of PV Converter Integrated into Railway Traction Power Supply System," Energies, MDPI, vol. 13(22), pages 1-17, November.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:22:p:5989-:d:446025
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    References listed on IDEAS

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    1. Francesco Mancini & Benedetto Nastasi, 2020. "Solar Energy Data Analytics: PV Deployment and Land Use," Energies, MDPI, vol. 13(2), pages 1-18, January.
    2. Hannah Mareike Marczinkowski & Luísa Barros, 2020. "Technical Approaches and Institutional Alignment to 100% Renewable Energy System Transition of Madeira Island—Electrification, Smart Energy and the Required Flexible Market Conditions," Energies, MDPI, vol. 13(17), pages 1-22, August.
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