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Power dynamic allocation strategy for urban rail hybrid energy storage system based on iterative learning control

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  • Wang, Xin
  • Luo, Yingbing
  • Qin, Bin
  • Guo, Lingzhong

Abstract

In urban rail transit, hybrid energy storage system (HESS) is often designed to achieve “peak shaving and valley filling” and smooth out DC traction network power fluctuation. In this paper, a variable gain K iterative learning control (K-ILC) is proposed to balance the DC regulated voltage characteristics and the optimal lifetime of the battery storage system in the HESS. Firstly, according to the traction power demand obtained from the train running speed demand, a moving average filters algorithm (MAF) is used to assign the high-frequency power command to the onboard ultracapacitors and the low-frequency power command to the batteries and traction network, respectively. Then, in order to prolong the battery life, a variable gain ratio is introduced in the traditional PD open-loop iterative learning control by designing the power allocation switching rules and the optimal change trajectory of battery life. This will provide the control of the battery charging and discharging current so as to prevent overcharge and overdischarge. To verify the effectiveness of the proposed strategy, experiments are performed both in MATLAB/Simulink and in the RT-LAB semi-Physical real-time simulation system. The experimental results show that the proposed control strategy effectively stabilizes the bus voltage and extends the battery lifetime.

Suggested Citation

  • Wang, Xin & Luo, Yingbing & Qin, Bin & Guo, Lingzhong, 2022. "Power dynamic allocation strategy for urban rail hybrid energy storage system based on iterative learning control," Energy, Elsevier, vol. 245(C).
  • Handle: RePEc:eee:energy:v:245:y:2022:i:c:s0360544222001669
    DOI: 10.1016/j.energy.2022.123263
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    References listed on IDEAS

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    1. Liu, Huanlong & Chen, Guanpeng & Xie, Chixin & Li, Dafa & Wang, Jiawei & Li, Shun, 2020. "Research on energy-saving characteristics of battery-powered electric-hydrostatic hydraulic hybrid rail vehicles," Energy, Elsevier, vol. 205(C).
    2. Pan, Deng & Zhao, Liting & Luo, Qing & Zhang, Chuansheng & Chen, Zejun, 2018. "Study on the performance improvement of urban rail transit system," Energy, Elsevier, vol. 161(C), pages 1154-1171.
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    Citations

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    Cited by:

    1. Amine, Hartani Mohamed & Aissa, Benhammou & Rezk, Hegazy & Messaoud, Hamouda & Othmane, Adbdelkhalek & Saad, Mekhilef & Abdelkareem, Mohammad Ali, 2023. "Enhancing hybrid energy storage systems with advanced low-pass filtration and frequency decoupling for optimal power allocation and reliability of cluster of DC-microgrids," Energy, Elsevier, vol. 282(C).
    2. Bingqiang Li & Saleem Riaz & Yiyun Zhao, 2023. "Experimental Validation of Iterative Learning Control for DC/DC Power Converters," Energies, MDPI, vol. 16(18), pages 1-16, September.
    3. Yang, Songpo & Chen, Yanyan & Dong, Zhurong & Wu, Jianjun, 2023. "A collaborative operation mode of energy storage system and train operation system in power supply network," Energy, Elsevier, vol. 276(C).
    4. Ying Wang & Ya Guo & Xiaoqiang Chen & Yunpeng Zhang & Dong Jin & Jing Xie, 2023. "Research on the Energy Management Strategy of a Hybrid Energy Storage Type Railway Power Conditioner System," Energies, MDPI, vol. 16(15), pages 1-16, August.

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