| 摘要 |
PROBLEM TO BE SOLVED: To obtain a control device for the drum level of a boiler, in which the controllability is improved by preventing the drum-level control from becoming unstable due to shape variation of a structure in a drum for steam separation. SOLUTION: The control device is provided with a controller, in which a correction gain 41 is set lower by a required amount in a level zone, in which the drum level control becomes unstable due to shape variation of the structure in the drum for steam separation, and the set value and a drum-level error 27 is multiplied together for the control.
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