火電廠主汽溫具有大慣性、大遲延和時(shí)變特性等特性，采用常規(guī)的PID 串級(jí)控制難
以獲得滿意的控制效果。為此，提出一種基于模糊自整定PID 控制器的串級(jí)控制系統(tǒng)，該系統(tǒng)將模糊控制、PID 控制和串級(jí)控制三者有機(jī)地相結(jié)合，提高了主汽溫控制系統(tǒng)的控制品質(zhì)。仿真結(jié)果表明：系統(tǒng)超調(diào)量、調(diào)節(jié)時(shí)間和抗干擾能力明顯優(yōu)于常規(guī)的PID 串級(jí)控制。
關(guān)鍵詞：主汽溫；串級(jí)控制；模糊自整定 PID 控制器
Abstract: Because the fresh steam temperature variation of the thermal power plant is characterized by large inertial time-delay and variation with time, it is difficulty for conventional PID cascade control method to obtain satisfactory control effects. Therefore, a cascade control method based on fuzzy self-tuning PID controller is proposed, which combines fuzzy control, PID control and cascade control. The simulation result shows that the proposed control method is better than the conventional PID cascade control method in the system overshoot, the adjusting time and the capacity of anti-disturbance.
Key words: fresh steam temperature; cascade control; fuzzy self-tuning PID controller