Steam generator water level SMC-ADRC cascade control based on improved power reaching law

In order to effectively control the water level of steam generator (SG), SG water level control objects mathematically are derived in the paper, in the context of cascade PID control system proposed two-order active disturbances rejection control(ADRC), and on this basis to further put forward a variable structure sliding mode control (SMC) strategy to replace the nonlinear state feedback control error rate of ADRC. Performance of SMC-ADRC control system demonstrated is better than ADRC control systems, time and location to reach steady-state may slip regulation, transient and steady-state performance are better, robustness and strong anti-jamming capability.