摘要
自适应控制具有良好的鲁棒性,调节速度快和抗干扰性能优越。针对火电厂660 MW超临界机组主汽压力被控对象具有非线性、强耦合等特点,采用自适应控制系统结构实现对锅炉主汽压力的优化控制,保证系统运行的高效性和稳定性。通过主汽压力归一化的MIT-MRAC控制系统的仿真实验,可以证明该方法能够有效地解决系统变量之间的耦合关系,能够根据当前负荷的变化做出相应的控制。当系统受到燃料率等方面的干扰时,经过系统的自动调节后能够很快地消除扰动的影响,能够做到稳、快、准地实现主蒸汽压力有效的调节,保证燃料的充分燃烧。这种控制方法能使复杂生产过程控制在最佳运行状态,降低煤耗,保证系统的安全性与可靠性。
Adaptive control has high robustness, rapid response capability and anti- interference performance. The main steam pressure control of 660 MW supercritical unit is a strong coupling and time-varying nonlinear system with many variables complex, MRAC method is then applied torealize the optimal control of boiler main steam pressureand ensure system efficiency and reliability. The simulation results show that the MIT-MRACcan effectively solve the coupling relationship between system variables, and it can take controls according to the changes of the current load. When the system is disturbed by the fuel rate, it can quickly eliminate the influence of disturbance after the automatic adjustment of the system, the main steam pressure can be adjusted stably, fast and accurately and the fuel sufficient combustion be ensured. This control method can make the complex process running in the bestoperation condition, reduce effectively coal consumption, and ensure system security and reliability.
出处
《锅炉技术》
北大核心
2018年第1期6-9,共4页
Boiler Technology
基金
内蒙古自然科学基金项目(2016MS0621)
关键词
超临界机组
自适应控制
主汽压力
仿真
supercritical unit
adaptive control
main steam pressure
simulation
