Fuzzy Adapting PID Based Boiler Drum Water Level Controller

The Boiler control is one of the most basic thermal power plant controls. Boiler water level control system includes steam drum water level, steam flow and water supply. The control objective is to control the water level of boiler drum. Fuzzy Adaptive PID controller is designed for controlling the boiler drum water level at a certain range. Fuzzy adaptive controller seeking the three parameters of PID controller and the relationship between e and ec, make the best adjustment for PID parameters on the steam drum water level system automatically. MATLABSIMULINK models of the boiler drum water level system are developed for the PID, Fuzzy-PID, and Fuzzy Adaptive PID controller. The simulation result of Fuzzy Adaptive PID controller shows that the system is more stable, can meet the load and frequent fluctuations of water supply pressure, and improve the quality control of the internal and external disturbances.