Observer-Based Output Feedback Integral Control for Coal-Fired Power Plant

This chapter explores the control of multivariable coal-fired power plants (CFPP) characterized by interconnected nonlinear subsystems with varying time lags. Employing singular perturbation and time-scale theories, the study develops an integral state feedback controller with an observer using a three-time-scale approach. This controller ensures zero steady-state error, utilizes a three-stage feedback control with a two-time-scale separation for reduced complexity, and employs an observer constructed through time-scale decoupling. Practical testing on a 300 MW CFPP model demonstrates superior performance compared to another published controller, highlighting the effectiveness of the proposed three-time-scale control strategy in managing plant behavior under various transients.