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Two-Stage Real-Time Frequency Regulation Strategy of Combined Heat and Power Units with Energy Storage

Author

Listed:
  • Yan Zhang

    (School of Electrical Engineering, Dalian University of Technology, Dalian 116024, China)

  • Yang Shen

    (School of Electrical Engineering, Dalian University of Technology, Dalian 116024, China)

  • Rui Zhu

    (School of Electrical Engineering, Dalian University of Technology, Dalian 116024, China)

  • Zhu Chen

    (Huaneng Dalian Power Plant, Dalian 116113, China)

  • Tao Guo

    (Huaneng Dalian Power Plant, Dalian 116113, China)

  • Quan Lv

    (School of Electrical Engineering, Dalian University of Technology, Dalian 116024, China)

Abstract

In view of the frequency regulation (FR) policy in Northeast China, a two-stage real-time rolling optimization model for power plants participating in FR ancillary services is established. The optimization object of the first stage is to maximize the overall profitability of the power plant and to obtain FR performance sub-indicators ( K 1 , K 2 , K 3 ) and the electric power curve of combined heat and power (CHP) units with energy storage. The second stage of the model performs load distribution with the objective of minimizing operating cost, subject to the constraint of electric and heat power balance for CHP units and energy storage. Meanwhile, rolling optimization combined with dynamic correction is used to ensure the accuracy of the two-stage FR optimization model by updating the operating status of the CHP units and energy storage and reducing the prediction errors of the FR commands. The above models have been validated by actual case studies of a CHP plant in Northeast China. They can ensure the economic and sustainable operation of CHP units and energy storage, enabling the CHP plant to benefit in the FR ancillary services market. The models offer a useful reference for CHP enterprises in terms of FR.

Suggested Citation

  • Yan Zhang & Yang Shen & Rui Zhu & Zhu Chen & Tao Guo & Quan Lv, 2025. "Two-Stage Real-Time Frequency Regulation Strategy of Combined Heat and Power Units with Energy Storage," Energies, MDPI, vol. 18(8), pages 1-21, April.
    • Handle: RePEc:gam:jeners:v:18:y:2025:i:8:p:1953-:d:1632428
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    References listed on IDEAS

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