The main steam temperature system of power plant boiler has obvious characteristics of large delay

so the conventional control methods are difficult to obtain the desired control performances.The structure design principle and parameter tuning methods of model-driven two-degree-of-freedom PID(MDTDOF-PID)were analyzed and applied to the main steam temperature control

in which the PD feedback compensator was used to improve the large delay of the main steam temperature and the main controller was designed by the internal model control(IMC).By comparing the MD-TDOF-PID control system with the conventional PID and the internal model control by simulation test

the experimental results show that the MD-TDOF-PID control system could quickly track the change of set point without overshoot

it had strong robustness

which can effectively improve the control performance of processes.