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Modified active disturbance rejection control for fluidized bed combustor.

Zhenlong Wu1, Donghai Li1, Yali Xue1

  • 1State Key Lab of Power Systems, Department of Energy and Power Engineering, Tsinghua University, Beijing 100084, China.

ISA Transactions
|March 19, 2020
PubMed
Summary
This summary is machine-generated.

A modified active disturbance rejection control (MADRC) improves fluidized bed combustor (FBC) boiler performance. This advanced control strategy enhances stability and disturbance rejection for better temperature regulation in power systems.

Keywords:
Control performanceFluidized bed combustorHigh order systemModified active disturbance rejection controlPeltier temperature control platform

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Area of Science:

  • Control Engineering
  • Thermodynamics
  • Power Systems Engineering

Background:

  • Fluidized bed combustor (FBC) boilers face control challenges like nonlinearity and coupling.
  • Integration of sustainable energy necessitates faster FBC boiler response to automatic generation control (AGC) commands.
  • Maintaining stable bed temperature during rapid load changes is critical for FBC boiler operation.

Purpose of the Study:

  • To develop and validate a modified active disturbance rejection control (MADRC) for high-order FBC boiler systems.
  • To enhance the control quality and robustness of FBC boilers under dynamic operating conditions.
  • To provide a theoretical stability analysis and practical tuning guidelines for the proposed MADRC.

Main Methods:

  • A modified active disturbance rejection control (MADRC) algorithm was designed for K/(Ts+1)^n type systems.
  • Theoretical stability analysis of the MADRC was performed and proven.
  • A tuning procedure and toolbox were developed for practical implementation.
  • Simulations and experiments on a Peltier temperature control platform were conducted for validation.

Main Results:

  • The MADRC demonstrated superior estimation and control performance compared to PI and standard ADRC controllers.
  • The MADRC significantly reduced overshoot and settling time in FBC boiler temperature control.
  • The MADRC exhibited robust disturbance rejection capabilities against input and coal quality variations.
  • Statistical indices confirmed the enhanced control quality provided by the MADRC.

Conclusions:

  • The proposed MADRC effectively addresses the control challenges in FBC boilers, particularly under dynamic AGC demands.
  • The MADRC offers improved stability, faster response, and superior disturbance rejection for FBC boiler temperature control.
  • The developed tuning procedure and toolbox facilitate the practical application of MADRC in industrial settings.