At present

the coordinated control system of heating units adopts PID controller

but the pressure in front of the steam turbine and the heating extraction flow of the unit will fluctuate in the process of generating power regulation. Similarly

the pressure in front of the steam turbine and the generating power will fluctuate in the process of heating extraction flow regulation. To solve the above problems

a 330 MW heating unit is taken as the research object to identify the linear state space model of the unit based on the nonlinear heating unit model

and forecast the state variables and unit output based on the state space model. According to the input and output variables of the heating unit

the model predictive controller of the heating unit is designed. The model predictive controller completes the coordinated control of the unit after output prediction and rolling optimization. The simulation test under varying load condition shows that

the model predictive control scheme is feasible. Compared with the PID control scheme

the model predictive control scheme can solve the fluctuation problem of other outputs of heating units in the process of load regulation.