| The feed-water control in supercritical once-through boiler is regarded as the most considerable parameter of the unit operation that has contributed to the demand of unit safety and efficiency in the operating process. The application of MATLAB System Identification Toolbox was point to the mathematical model in the feed-water control system concerning the intermediate point enthalpy. And the control of feed-forward and feed-back based on the feed-water temperature signal was employed with respect to the very extent in the delay, inertia and time-variant property, which improved the control quality of the water-fuel ratio in particular. The simulation results showed that the favorable control mode was accounted for the capable of decreasing the intermediate point enthalpy variation at different disturbs value and the quality of control. |
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