Fully Actuated System Approach for Effective Control of Superheated Steam Temperature Control Systems

Under the framework of high-order fully actuated (HOFA) system theory, this article investigates the control of superheated steam temperature in thermal power units which aims to stabilize the superheated steam temperature at setpoint. Using the fully actuated property, we derive the HOFA system mathematically from the rigorously developed mechanistic model of the superheated steam temperature system. Based on the HOFA framework, we design a control law to achieve a linear closed-loop system, enabling eigenstructure assignment for desired performance. The simulations demonstrate that the HOFAbased controller rapidly regulates the temperature with minimal overshoot, small steady-state error, and a small settling time. Comparative studies with conventional PID control highlight the superiority of the HOFA approach in handling nonlinearity and large inertia, significantly reducing settling time while improving stability.