Multi-model prediction control method of carbon dioxide after combustion capture system
A predictive control and multi-model technology, applied in the direction of control/regulation system, adaptive control, general control system, etc., can solve the problems of stability degradation and predictive controller control performance degradation, etc.
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[0063] Apply the multi-model predictive control method of the present invention to the CO after combustion of a certain 1MW thermal power unit 2 In the simulation model of the capture system, the control goal is to make the CO 2 Capture rate and reboiler temperature track set point for CO 2 Large-scale variable operating conditions of the capture system.
[0064] Post-combustion CO of the present invention 2 A multi-model predictive control method for capture systems based on chemisorption-based post-combustion CO 2 The capture system is the controlled object, the lean liquid valve opening and the steam turbine low-pressure cylinder extraction valve opening are the system control inputs, and the CO 2 The capture rate and reboiler temperature are the output of the system. First, based on the subspace identification method, using the data generated by the system operation, the local state space model of the system is established at different operating points; then the gap mea...
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