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Model-based adaptive sliding mode control of the subcritical boiler-turbine system with uncertainties
- Source :
- ISA Transactions. 79:161-171
- Publication Year :
- 2018
- Publisher :
- Elsevier BV, 2018.
-
Abstract
- As higher requirements are proposed for the load regulation and efficiency enhancement, the control performance of boiler-turbine systems has become much more important. In this paper, a novel robust control approach is proposed to improve the coordinated control performance for subcritical boiler-turbine units. To capture the key features of the boiler-turbine system, a nonlinear control-oriented model is established and validated with the history operation data of a 300 MW unit. To achieve system linearization and decoupling, an adaptive feedback linearization strategy is proposed, which could asymptotically eliminate the linearization error caused by the model uncertainties. Based on the linearized boiler-turbine system, a second-order sliding mode controller is designed with the super-twisting algorithm. Moreover, the closed-loop system is proved robustly stable with respect to uncertainties and disturbances. Simulation results are presented to illustrate the effectiveness of the proposed control scheme, which achieves excellent tracking performance, strong robustness and chattering reduction.
- Subjects :
- 0209 industrial biotechnology
Computer science
020209 energy
Applied Mathematics
ComputerApplications_COMPUTERSINOTHERSYSTEMS
02 engineering and technology
Sliding mode control
Computer Science Applications
Nonlinear system
020901 industrial engineering & automation
Control and Systems Engineering
Linearization
Control theory
Robustness (computer science)
Load regulation
0202 electrical engineering, electronic engineering, information engineering
Feedback linearization
Electrical and Electronic Engineering
Robust control
Instrumentation
Subjects
Details
- ISSN :
- 00190578
- Volume :
- 79
- Database :
- OpenAIRE
- Journal :
- ISA Transactions
- Accession number :
- edsair.doi.dedup.....acdd5ee43b46ebcc60a6e2f9e03202b8