IDEAS home Printed from https://ideas.repec.org/a/eee/energy/v358y2026ics0360544226015240.html

Flexible peak shaving control scheme for ultra-supercritical coal-fired power unit coupled with molten salt heat storage system

Author

Listed:
  • Huang, Ting
  • Zhao, Chunhui
  • Zhang, Haoran

Abstract

-The rapid development of intermittent renewable energy sources forces the coal-fired power units couple with molten salt heat storage technology to achieve deeper and faster peak shaving. However, complex ultra-supercritical coal-fired power unit-molten salt heat storage system (USCCFU-MSHSS) exhibits significant dynamic differences in wide-load range. Existing control methods have not fully considered the model structures, control requirements and constraints differences of power unit and heat storage system at various peak shaving modes. Therefore, a flexible peak shaving control scheme based on the concept of multi-modal control is proposed for USCCFU-MSHSS to achieve the precise, rapid and economic load control under deep and basic peak shaving modes. Unlike the conventional single-mode controller, the proposed scheme employs specialized control strategies for distinct peak shaving modes, matching the control method to specific operating task. First, by analyzing the thermodynamic characteristics of USCCFU-MSHSS under various peak shaving conditions, a multi-modal model is established to accurately describe its parameters variations in wide-load range. Second, we formulate a multi-objective optimization problem for USCCFU-MSHSS in deep and basic peak shaving modes, incorporating the coal consumption, carbon emissions, control requirements of power unit, and safety constraints of heat storage system. Third, for the deep peak shaving process, we design a Kalman filter-enhanced active disturbance rejection control (KF-ADRC) strategy, optimized by strength Pareto evolutionary algorithm based on reference direction (SPEAR), to reject unknown disturbances and compute optimal control laws. Furthermore, to maximize the revenue during basic peak shaving conditions, we propose the multi-objectives model predictive control (MO-MPC) approach to optimally adjust the water-to-coal ratio and main steam valve position. Finally, the effectiveness of the proposed flexible peak shaving control scheme is validated based on various peak shaving test results of an actual 660MW-40MW USCCFU-MSHSS.

Suggested Citation

  • Huang, Ting & Zhao, Chunhui & Zhang, Haoran, 2026. "Flexible peak shaving control scheme for ultra-supercritical coal-fired power unit coupled with molten salt heat storage system," Energy, Elsevier, vol. 358(C).
    • Handle: RePEc:eee:energy:v:358:y:2026:i:c:s0360544226015240
    DOI: 10.1016/j.energy.2026.141418
    as

    Download full text from publisher

    File URL: http://www.sciencedirect.com/science/article/pii/S0360544226015240
    Download Restriction: Full text for ScienceDirect subscribers only
    File URL: https://libkey.io/10.1016/j.energy.2026.141418?utm_source=ideas
    LibKey link: if access is restricted and if your library uses this service, LibKey will redirect you to where you can use your library subscription to access this item
    ---><---

    As the access to this document is restricted, you may want to

    for a different version of it.

    More about this item

    Keywords

    ;
    ;
    ;
    ;
    ;

    Statistics

    Access and download statistics

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:eee:energy:v:358:y:2026:i:c:s0360544226015240. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    We have no bibliographic references for this item. You can help adding them by using this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: Catherine Liu (email available below). General contact details of provider: http://www.journals.elsevier.com/energy .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.