Fuzzy Control of Deaerator Water-Level in Nuclear Power Station Based on MATLAB/Simulink

Deaerator system was one of major components in nuclear power station, and the deaerator water level control was important for safe and stable operation of the nuclear power station. The deaeration system was difficult multi variables process system, which was strong coupling between water-level and pressure. In this paper, a self-tuning fuzzy PID controller was designed based on PID control and fuzzy control theory, which instead of PID controller to control deaerator water-level. Simulation based on Simulink, simulation results showed that the overshoot was 40% by using traditional PID controller, while the overshoot was 12% by using self-tuning fuzzy PID controller. On the other hand, a fuzzy decoupling control scheme was designed to solve the problem of strong coupling between water-level and pressure. Simulation based on Simulink, simulation results showed that the adaptive fuzzy PID decoupling control could get quicker response, overshoot and regulation time was shorter.