摘要
超临界火电机组具有大容量、高参数的特点,如何将机组主蒸汽温度快速地控制在额定范围之内是火电厂热工过程控制面临的主要难题。本文针对超临界锅炉机组的主蒸汽温度控制问题,提出一种基于广义Hammerstein模型的主蒸汽温度串级控制方案。内环采用PI控制器克服内部扰动,从而减少扰动对于导前汽温的影响。将内环PI闭环控制系统及惰性区作为广义被控对象,根据不同工况下采集的导前气温设定值和主蒸汽温度值建立主蒸汽温度广义Hammerstein模型,利用Hammerstein模型的特殊结构将传统非线性控制问题转化为线性控制问题。仿真实例表明,本文的控制方法有良好的控制效果,可以兼顾多个工况点的性能。
The super-critical fossil power generating unit has the characteristics of large capacity and high parameters, how to quickly control the main steam temperature to the setpoint is a hard work in the field of fire power station controlling. Considering the control problem of the main steam temperature of super critical boiler machine set, a generalized Hammerstein model based cascade control for the main steam temperature of fire electrical engineering set is proposed in this paper. A PI controller is employed in the inner loop to overcome inner disturbance, which can decrease the influence of the leading area＇s differential temperature. Then a generalized Hammerstein model for the main temperature, which includes PI closed loop and inert segment.main steam temperature is established by using the information of the set point of leading area＇s differential temperature and the main steam temperature in different condition. For the special structure of the Hammerstein model, a traditional nonlinear control problem is simplified to a linear control problem. Simulation results demonstrated that the control approach in this paper has good control effect and performance of more than one operating point is considered.
出处
《计算机与应用化学》
CAS
CSCD
北大核心
2013年第10期1107-1112,共6页
Computers and Applied Chemistry
基金
国家自然科学基金资助项目(61004019
61374044)
上海市科委国际合作项目(12510709400)
