Study On The New Control Strategy Of The Coordinated Control System

Coordinated control system is a complicated multi-variable control system. It is valuableto study the Coordinated Control System for improving the automatic degree and securityeconomical operation level of thermal power plant.In this paper, based on the mechanism mathematical model, a type of non-linear dynamicsimulation model of unit plant was designed. Analysed the basic principles of the statefeedback and observer, the concept of incremental mode state observer was proposed. Basedon the mechanism mathematical model of thermal power plant, a type of incremental modestate observer was designed. This paper proposes a new type control method in which thestate feedback based on incremental mode state observer is combined with conventional PIDcontrol. The great inertia and time lag can be overcome and the load adaptability can beimproved by using the state feedback, the steady state index of control system is ensured byusing PID control. Simulation shows that the control algorithm has the advantage of controlperformance and robust property in the Coordinated Control System and has wide applicationprospect.