【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。更多还原

【Abstract】 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 from 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.更多还原