Control of Nonlinear Constrained Ultra-Supercritical Boiler–Turbine Units Using Offset-Free Output-Feedback Stable MPC

Abstract It is extremely challenging to control ultra-supercritical boiler–turbine unit on account of its nonlinearity, coupling among multi-variables, hard input constraints, and unknown disturbances. An offset-free output-feedback stable model predictive control (MPC) (OFOF-SMPC) for nonlinear constrained ultra-supercritical boiler-turbine units is investigated. It is shown that the OFOF-SMPC is composed of a disturbance and state observer, a steady-state target calculator as well as a stable MPC, which can remove unknown disturbances from output channels and ensure the stability of the closed-loop system with input constraints. Simulation results demonstrate the effectiveness of the proposed algorithm.

[1]  Jiong Shen,et al.  Extended state observer based fuzzy model predictive control for ultra-supercritical boiler-turbine unit , 2017 .

[2]  Marcelo C. M. Teixeira,et al.  Stabilizing controller design for uncertain nonlinear systems using fuzzy models , 1999, IEEE Trans. Fuzzy Syst..

[3]  Jiong Shen,et al.  L1 adaptive control for improving load-following capability of nonlinear boiler-turbine units in the presence of unknown uncertainties , 2015, Simul. Model. Pract. Theory.

[4]  Un-Chul Moon,et al.  Step-Response Model Development for Dynamic Matrix Control of a Drum-Type Boiler–Turbine System , 2009, IEEE Transactions on Energy Conversion.

[5]  G. Feng,et al.  A Survey on Analysis and Design of Model-Based Fuzzy Control Systems , 2006, IEEE Transactions on Fuzzy Systems.

[6]  Jun Yang,et al.  Generalized Extended State Observer Based Control for Systems With Mismatched Uncertainties , 2012, IEEE Transactions on Industrial Electronics.

[7]  Xiao Wu,et al.  Nonlinear model predictive control of ultra-supercritical once through boiler-turbine unit , 2015, 2015 Chinese Automation Congress (CAC).

[8]  Jizhen Liu,et al.  A dynamic model used for controller design of a coal fired once-through boiler-turbine unit , 2015 .

[9]  Jiong Shen,et al.  Offset-free fuzzy model predictive control of a boiler-turbine system based on genetic algorithm , 2012, Simul. Model. Pract. Theory.

[10]  Jiong Shen,et al.  A Collaborated Multi-controller Strategy by Using L1 Adaptive Augmentation Control for Power-generation Systems with Uncertainties , 2015, Inf. Technol. Control..

[11]  Xiao Wu,et al.  Fuzzy modeling and stable model predictive tracking control of large-scale power plants , 2014 .

[12]  Xiumin Chu,et al.  A state-compensation extended state observer for model predictive control , 2017, Eur. J. Control.

[13]  Manfred Morari,et al.  Robust constrained model predictive control using linear matrix inequalities , 1994, Proceedings of 1994 American Control Conference - ACC '94.

[14]  Tryphon T. Georgiou,et al.  On the computation of the gap metric , 1988 .

[15]  Kwang Y. Lee,et al.  Multiobjective optimal power plant operation through coordinate control with pressure set point scheduling , 2001 .