For the turbine speed governor system with input constraints, the nonlinear large disturbance attenuation switching<br> control scheme is investigated based on the backstepping method for the single-machine steam valve system. Backstepping controller avoids linearizing model of the system, and makes the controller more accurate. For power interference, short circuit and so on. Minimax makes the system more quickly suppression the interference and more accurate return to equilibrium, which does
