摘要
锅炉主汽温直接影响全厂的热效率和设备的安全运行。为了改善主汽温的控制效果,针对主汽温控制系统大惯性、大迟延和时变的特点,在利用现场数据辨识得出主汽温模型的基础上,提出一种基于两级Smith预估补偿的:PID串级控制系统。在主副回路分别加入Smith预估器,同时对主副回路进行补偿。仿真结果表明,该控制方法在正常工况和参数变化的情况下,超调量和调节时间等方面都有所改善,提高了控制系统的鲁棒性和抗干扰能力。
Main steam temperature directly affects thermal efficiency of the whole plant and the safe operation of the equipment.In order to improve the effect of the main steam temperature control,considering the characteristics of large inertia,large time delay and time-variation of the main steam temperature,the paper proposed a PID Cascade Control System with two-stage Smith compensation,based on identifying the main steam temperature model using the data on set.In this paper,the main and auxiliary circuits were both added in Smith predictor,to compensate the primary and secondary loop at the same time.Simulation result shows that the overshoot,setding time of the control method have been improved under the normal operating condition and parameters changing conditions,which improves the robustness of the control system and anti-jamming capability.
出处
《计算机仿真》
CSCD
北大核心
2016年第5期148-151,共4页
Computer Simulation
关键词
主汽温
史密斯预估器
时延
鲁棒性
Main steam temperature
Smith predictor
Time delay
Robust
