| 摘要 |
PROBLEM TO BE SOLVED: To provided a method for controlling steam pressure capable of enhancing the control performance of the steam pressure in boiler turbine power generation facilities suppressing the generation of vibration even though the vibration is generated in the case of setting a large gain.SOLUTION: In a method for controlling a steam pressure including differential control, it is determined that the generation of the vibration of the steam pressure is generated, a fuel quantity correcting amount is corrected by a correcting gain according to a section of a steam pressure variation (&Dgr;P) to a correcting amount by the differential control of the steam pressure variation (&Dgr;P), and the correcting gain is made zero in a section including a value where the steam pressure variation (&Dgr;P) becomes zero, in the case that a time (Tp) from a time 31 when the steam pressure variation (&Dgr;P) deviates from a pressure range set in advance at the first time to a time 34 when the same enters the pressure range at the second time is not shorter than a time (Tv) set in advance, in the case (34) that the steam pressure variation (&Dgr;P) between a steam pressure measured value and a vapor pressure set value deviates from the pressure range 37 set in advance (31), phenomena entering the pressure range 37 occur more than two times. |
