Design and Application of Synthetic Coordinated Control System to Power Plant

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.