Coordinated Predictive Control of Boiler Reheated Steam Temperature Using Tilter and Attemperator

To overcome the limitation existing in current reheated steam temperature control systems, a predictive control method was proposed by coordinatedly adjusting the tilter angle and attemperator spray, based on improved control methods for boiler reheated steam temperature from aspects of control algorithm and switching logic, and subsequently the control effectiveness was compared with that of conventional predictive control and cascade PID control. Simulation results show that the method proposed can help to realize smooth swithing between tilter angle adjustment and attemperator spray regulation without any disturbance, thus improving the control performance and operation stability of the system, and lowering the switching frequency between above two ways.