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Research on Low-Frequency Stability under Emergency Power Supply Scheme of Photovoltaic and Battery Access Railway Traction Power Supply System

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  • Ying Wang

    (School of Automation and Electrical Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China
    Key Laboratory of Opt-Electronic Technology and Intelligent Control Ministry of Education, Lanzhou 730070, China)

  • Yueyang Xin

    (School of Automation and Electrical Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China)

  • Ziyun Xie

    (School of Automation and Electrical Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China)

  • Xiuqing Mu

    (School of Automation and Electrical Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China)

  • Xiaoqiang Chen

    (School of Automation and Electrical Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China
    Key Laboratory of Opt-Electronic Technology and Intelligent Control Ministry of Education, Lanzhou 730070, China)

Abstract

Photovoltaics and batteries can be connected to a traction power supply system through a railway power conditioner (RPC) to switch between different control strategies. This can address power quality issues or provide emergency traction for locomotives that unexpectedly lose power and even break through traditional energy barriers in the railway field, achieving a low-carbon power supply for railway energy, and a mutual backup with substations. However, methods to coordinate the control strategies of PV and the battery locomotive traction have not been clearly revealed, nor has the actual stability of the system. In this study, to address the above issues, an emergency power supply scheme is proposed for the first time that utilizes a dual-mode RPC inverter combined with a coordinated control strategy for the PV and battery, achieving the traction of locomotives. In addition, a one-dimensional impedance model was established for the PV system, battery system, locomotive (CRH3), and RPC projected onto the dq coordinate system, and the critical amplitude margin (CAM) was defined to quantitatively analyze the sensitivity and laws of different parameters concerning the low-frequency stability of the system. At the same time, impedance ratios and passive criteria were used to reveal the stability mechanism, and parameter adjustment criteria and design suggestions were put forward. Finally, the feasibility of the emergency power supply scheme of the “PV–battery locomotive network” coupling system and the correctness of the low-frequency stability study were verified using the Starsim semi-physical experiment platform.

Suggested Citation

  • Ying Wang & Yueyang Xin & Ziyun Xie & Xiuqing Mu & Xiaoqiang Chen, 2023. "Research on Low-Frequency Stability under Emergency Power Supply Scheme of Photovoltaic and Battery Access Railway Traction Power Supply System," Energies, MDPI, vol. 16(12), pages 1-32, June.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:12:p:4814-:d:1175403
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    References listed on IDEAS

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    1. Mohamed Tanta & José Gabriel Pinto & Vitor Monteiro & Antonio P. Martins & Adriano S. Carvalho & Joao L. Afonso, 2020. "Topologies and Operation Modes of Rail Power Conditioners in AC Traction Grids: Review and Comprehensive Comparison," Energies, MDPI, vol. 13(9), pages 1-30, May.
    2. Jian Wang & Xuying Yang & Sonia Kumari, 2023. "Investigating the Spatial Spillover Effect of Transportation Infrastructure on Green Total Factor Productivity," Energies, MDPI, vol. 16(6), pages 1-18, March.
    3. Qiwei Lu & Zhixuan Gao & Bangbang He & Cheng Che & Cong Wang, 2020. "Centralized-Decentralized Control for Regenerative Braking Energy Utilization and Power Quality Improvement in Modified AC-Fed Railways," Energies, MDPI, vol. 13(10), pages 1-31, May.
    4. Teng Li & Yongbin Shi, 2022. "Power Quality Management Strategy for High-Speed Railway Traction Power Supply System Based on MMC-RPC," Energies, MDPI, vol. 15(14), pages 1-20, July.
    5. 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.
    6. Mohamed Tanta & Jose Cunha & Luis A. M. Barros & Vitor Monteiro & José Gabriel Oliveira Pinto & Antonio P. Martins & Joao L. Afonso, 2021. "Experimental Validation of a Reduced-Scale Rail Power Conditioner Based on Modular Multilevel Converter for AC Railway Power Grids," Energies, MDPI, vol. 14(2), pages 1-27, January.
    7. Xinyu Zhang & Lei Wang & William Dunford & Jie Chen & Zhigang Liu, 2018. "Integrated Full-Frequency Impedance Modeling and Stability Analysis of the Train-Network Power Supply System for High-Speed Railways," Energies, MDPI, vol. 11(7), pages 1-19, July.
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