摘要
采用状态空间统一描述基于增量式函数观测器IFO-KΔx的状态反馈+PID综合型协调控制系统,通过数学分析,给出了控制系统稳定的充分条件。在一台600 MW机组机炉协调控制的工程实践中取得实际效果表明,在协调方式累计降负荷375 MW,机前压力从16.5MPa滑压减至13.0 MPa,当负荷指令以18 MW/min和8 MW/min两种速率变化时,实际负荷和机前压力均接近同样的速率达到目标值。这有效地解决了机炉协调受控对象所具有的非线性、参数慢时变、迟滞与大惯性以及耦合等难以控制的问题,证明了该设计方案和理论分析的正确性。
The state-space method is used to describe the synthetic coordinated control system that is combined with state feedback based on incremental function observer （IFO-KΔx）and PID controller. The sufficient condition of the control system stabilization is given by mathematical analysis. It is applied to a boiler-turbine coordinated control system of 600 MW generator unit. The engineering application result shows that, when total changing active power of 375 MW with 18 MW/min or 8 MW/min of different load change rate, and steam pressure fi＇om 16.5 MPa to 13.0 MPa. The power and pressure all reach the targets with the rate of set-points respectively. So the difficult problems, that the controlled object has characters of non-linear, parameters slow time variable, the great inertia, the large time lag and regulate coupling, are solved effectively. And the correctness of the design scheme and theory analysis is all testified.
出处
《控制工程》
CSCD
2007年第4期426-429,共4页
Control Engineering of China
