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Two-stage day-ahead and intraday low-carbon dispatch method based on enhancing the peak-load regulation capability of cogeneration units with a novel multi-stage Tesla valve thermal storage device

Author

Listed:
  • Wang, Yibo
  • Lin, Ze
  • Wang, Bowen
  • Liu, Chuang
  • Cai, Guowei
  • Liu, Hongdan
  • Ge, Junxiong

Abstract

With the increasing grid-connected capacity of renewable energy, the challenges of peak-load regulation for cogeneration units have intensified. To address the aforementioned issues, a two-stage day-ahead and intraday dispatch method, considering multi-stage Tesla valve thermal storage device to enhance the peak-load regulation capability of cogeneration units, is proposed. Firstly, the port characteristics of the Tesla valve are analyzed, and one NTSD based on multi-stage Tesla valve is innovatively proposed. Building on the analysis of its heat transfer and flow characteristics, the NTSD model is constructed. Then, the modeling analysis of two operational strategies for the NTSD demonstrates that its installation enhances the peak-load regulation capability of cogeneration units. To further exploit the peak-load regulation potential of cogeneration units, a two-stage day-ahead and intraday economic dispatch model aimed at minimizing system operating costs is established. Finally, the case study reveals that compared to TTSD, the NTSD improves peak-load regulation capacity by 11.92 % and 24.15 % in the day-ahead and intraday stages, respectively, and achieves cost savings of 1.05 % and 0.46 %. The results validate the significant potential of the proposed method in enhancing the economic efficiency and flexibility of power systems.

Suggested Citation

  • Wang, Yibo & Lin, Ze & Wang, Bowen & Liu, Chuang & Cai, Guowei & Liu, Hongdan & Ge, Junxiong, 2025. "Two-stage day-ahead and intraday low-carbon dispatch method based on enhancing the peak-load regulation capability of cogeneration units with a novel multi-stage Tesla valve thermal storage device," Energy, Elsevier, vol. 316(C).
    • Handle: RePEc:eee:energy:v:316:y:2025:i:c:s0360544225001094
    DOI: 10.1016/j.energy.2025.134467
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