An innovative bed temperature-oriented modeling and robust control of a circulating fluidized bed combustor

被引：0
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作者：
Hadavand, Aboozar [1 ]
Jalali, Ali Akbar [1 ]
Famouri, Parviz [2 ]
机构：
[1] Department of Electrical Engineering, Iran University of Science and Technology, Elm-o-Sanat street, Narmak, Tehran 16846, Iran
[2] Lane Department of Computer Science and Electrical Engineering, West Virginia University, Morgantown, WV 26506, United States
来源：
Chemical Engineering Journal | 2008年 / 140卷 / 1-3期
关键词：
Circulating fluidized bed (CFB) combustion systems are increasingly used as superior coal burning systems in power generation due to their higher efficiency and lower emissions. However; because of their non-linearity and complex behavior; it is difficult to build a comprehensive model that incorporates all the system dynamics. In this paper; a mathematical model of the circulating fluidized bed combustion system based on mass and energy conservation equations was successfully extracted. Using these correlations; a state space dynamical model oriented to bed temperature has been obtained based on subspace method. Bed temperature; which influences boiler overall efficiency and the rate of pollutants emission; is one of the most significant parameters in the operation of these types of systems. Having dynamic and parametric uncertainties in the model; a robust control algorithm based on linear matrix inequalities (LMI) have been applied to control the bed temperature by input parameters; i.e. coal feed rate and fluidization velocity. The controller proposed properly sets the temperature to our desired range with a minimum tracking error and minimizes the sensitivity of the closed-loop system to disturbances caused by uncertainties such as change in feeding coal; while the settling time of the system is significantly decreased. © 2007 Elsevier B.V. All rights reserved;
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页码：497 / 508
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