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High-fidelity operation model of hybrid pumped hydro-electrochemical energy storage with unit mode transition

Author

Listed:
  • Yang, Jingyue
  • Zhang, Hao
  • Zhang, Tian
  • Guo, Pengcheng
  • Bai, Yu
  • Zhao, Xin
  • Duan, Naixin
  • Dong, Duolin

Abstract

Accurately characterizing the operational status of a hybrid energy storage system is essential to optimizing its performance. This paper provides a real-time dispatch model to characterize the complementary dynamic response capabilities of the pumped hydro storage and electrochemical energy storage. This model defines the transient time and trajectory between the steady states of pumped hydro storage and adopts a 5-min dispatch interval to fully exploit the advantages of the energy storage systems. The integrated regulation ability of the hybrid energy storage system is assessed through intra-day and real-time rolling dispatch simulations for an energy base in Northwest China. Results show that the proposed model more effectively coordinates the operational transitions of pumped hydro storage and electrochemical energy storage, enhancing their joint regulation performance. The 5-min dispatch increased the average regulation power margin of the pumped hydro storage and electrochemical energy storage by 36.48 MW and 28.96 MW, respectively. This study provides a new perspective for the coordinated operation of capacity-type and power-type storage systems.

Suggested Citation

  • Yang, Jingyue & Zhang, Hao & Zhang, Tian & Guo, Pengcheng & Bai, Yu & Zhao, Xin & Duan, Naixin & Dong, Duolin, 2026. "High-fidelity operation model of hybrid pumped hydro-electrochemical energy storage with unit mode transition," Renewable Energy, Elsevier, vol. 268(C).
    • Handle: RePEc:eee:renene:v:268:y:2026:i:c:s0960148126006415
    DOI: 10.1016/j.renene.2026.125815
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