摘要
大型火电机组过热蒸汽温度作为被控对象具有滞后性、非线性、时变性,采用常规PID串级控制难以达到较好的控制效果。综合模糊及PI控制器的优点,提出了一种二模态控制策略,并将其应用于某超临界600MW机组过热蒸汽温度的控制,在DCS上进行了控制策略的设计组态和调试。基于虚拟处理单元(VDPU)的仿真表明,该算法可以有效地适应被控对象在运行中参数变化的影响,控制品质良好。
The superheated steam temperature of a large - scale generating unit has long time - delay, nonlinearity, time - variation and large time constant, which makes the effect of traditional PID control strategy not satisfactory. Base on the characteristics of Fuzzy and PI controllers,a double - mode con- trol strategy is presented and applied to a 600 MW supercritical generating unit for temperature control of superheated steam. The design configuration and debugging of this control strategy is accomplished on a DCS. Simulation results based on VDPU show that this method can effectively adapt to the changing of objective parameters with good control performance compared with PID control.
出处
《热力发电》
CAS
北大核心
2009年第5期80-83,共4页
Thermal Power Generation
