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Related Experiment Videos

Cascade generalized predictive control strategy for boiler drum level.

Min Xu1, Shaoyuan Li, Wenjian Cai

  • 1Institute of Automation, Shanghai Jiao Tong University, Shanghai 200030.

ISA Transactions
|August 9, 2005
PubMed
Summary
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This study introduces a cascade model predictive control (MPC) for boiler drum level control. The MPC approach effectively manages disturbances and constraints, outperforming traditional PID controllers in simulations and real-world boiler applications.

Area of Science:

  • Engineering
  • Control Systems
  • Chemical Engineering

Background:

  • Boiler drum level control is critical for safe and efficient power plant operation.
  • Conventional controllers like PID struggle with disturbances and system constraints.
  • Non-minimum phase characteristics pose challenges in boiler control systems.

Purpose of the Study:

  • To propose a novel cascade model predictive control (MPC) scheme for enhanced boiler drum level control.
  • To address limitations of existing control methods in handling disturbances and constraints.
  • To demonstrate the superiority of the proposed MPC scheme over conventional controllers.

Main Methods:

  • Implementation of a cascade control structure utilizing generalized predictive control (GPC) for both inner and outer loops.

Related Experiment Videos

  • Modeling and simulation of the boiler drum level system.
  • Comparative analysis with well-tuned cascade Proportional-Integral-Derivative (PID) controllers.
  • Experimental validation on a 75-MW boiler plant.

    • Main Results:

    • The cascade GPC effectively rejects measured and unmeasured disturbances, maintaining a constant drum level under varying loads.
    • The proposed method successfully handles non-minimum phase characteristics and system constraints.
    • Simulation results indicate superior performance compared to traditional cascade PID controllers.
    • Field implementation on a 75-MW boiler demonstrated significant improvements over conventional schemes.

    Conclusions:

    • Cascade generalized predictive control offers a robust and effective solution for boiler drum level control.
    • The proposed MPC scheme provides enhanced performance and disturbance rejection capabilities.
    • This advanced control strategy represents a significant improvement over conventional boiler control methods.