Adaptive control of steam valve of multi-machine power systems

The steam valve control problem in multi-machine power systems is dealt with. A design methodology of nonlinear large-disturbance adaptive control is proposed by using backstepping combined with minimax method. Considering the case that the boundary of uncertain parameter is known, the nonlinear minimax controller and the parameter adaptive law are designed to make sure that the steam valve system is insensitive to large-disturbance, and the interference processing conservative is reduced effectively. Finally, a two-machine power system is considered as an example, in which the generator may get large-disturbance suddenly, such as the mechanical power disturbance. The simulation results show that the proposed control scheme can improve the transient stability of the steam valve control system effectively.