Dynamic Simulation and Plant-wide Control for Flexible Operation of Subcritical Coal-fired Power Plant Integrated with Solvent-based Post-combustion CO₂ Capture

Due to increasing public concern on green-house gas effect, solvent-based post-combustion carbon capture (PCC) process has been widely applied to coal-fired power plant to address this problem. Due the strong interaction between capture process and power plant, advanced controllers are required for the integrated system. To operate the integrated system in a flexible manner, this paper aims to:1) link the small-scale PCC process with a small-scale coal-fired power plant in gCCS software; 2) develop feed-back control structures for target tracking and 3) design feed-forward controllers to quickly track the power output target and resist the variation of flue gas flowrate. Case studies were presented to investigate the system performance. Simulation results reveal that the feed-forward controller can satisfactorily lower the time needed for power output and reduce the disturbance of flue gas.