Optimal IOFL-based economic model predictive control technique for boiler-turbine system

The optimal control design of the boiler-turbine system is vital to ensure feasibility and high responsiveness over desired load variations. Using the traditional linear control techniques realization of this task is difficult, as the boiler-turbine mechanism has strong nonlinearities. Besides, envi...

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Bibliographic Details
Published in:ISA transactions 2024-10, Vol.153, p.143-154
Main Authors: Abdelbaky, Mohamed Abdelkarim, Kong, Xiaobing, Liu, Xiangjie, Lee, Kwang Y.
Format: Article
Language:English
Subjects:
Boiler-turbine system
Economic optimization
Input/output feedback linearization
Iterative algorithm
Model predictive control
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Summary:The optimal control design of the boiler-turbine system is vital to ensure feasibility and high responsiveness over desired load variations. Using the traditional linear control techniques realization of this task is difficult, as the boiler-turbine mechanism has strong nonlinearities. Besides, environmental and economic concerns have replaced existing tracking control ones as the primary concerns of advanced power plants. Thus, this study proposes an optimal economic model predictive controller (EMPC) scheme for this unit on the basis of the input/output feedback linearization (IOFL) method. By employing the IOFL method, this unit is decoupled into a new linearized model that is utilized for developing the suggested optimal IOFL EMPC technique. The proposed control scheme is formulated in an economic quadratic programming form that considers the input-rate and input limits of the unit for optimal economic performance. In addition, an adaptive iterative algorithm is utilized for constraints mapping with guaranteeing a feasible solution in a finite number of steps without violation of original constraints over the entire predictive horizon. The outcomes of the simulation show that the suggested optimal IOFL EMPC scheme offers an improved dynamic and economic output performance over fuzzy hierarchical MPC, fuzzy EMPC, and nonlinear EMPC techniques during various load variations. •An optimal EMPC scheme based on IOFL method is proposed for boiler-turbine unit.•The IOFL EMPC scheme is formulated in an economic QP form including constraints.•An adaptive iterative algorithm ensures feasible solution without limits violation.•The IOFL EMPC scheme enhances dynamic economic performance for boiler-turbine unit.
ISSN:0019-0578
1879-2022
1879-2022
DOI:10.1016/j.isatra.2024.07.013