MAJOR VAPOR PRESSURE, TEMPERATURE CONTROL DEVICE FOR ONCE-THROUGH BOILER

摘要

PROBLEM TO BE SOLVED: To prevent the major vapor pressure and the major vapor temperature from interfering at respective control systems by a method wherein a fuel flow rate is set in response to the major vapor pressure deviation, and a water supply flow rate is set in response to the major vapor temperature deviation, and in addition, compensation contents in response to respective deviations are added. ;SOLUTION: At an adder 23, a feed-back compensation signal (i) from a compensation adjuster 22 is subtracted, based on a feed-back control signal (d) from an adjuster 11, and the differential output is output to an adder 13 as a feed-back control signal (j) after a compensation process. At an adder 24, a feed-back control signal (e) from an adjuster 12 and a feed-back compensation signal (h) from a compensation adjuster 21, are added, and the sum output is output to an adder 14 as a feed-back control signal (k) after a compensation process. At an adder 13, a generating amount demand (MWD) (a) and the feed-back control signal (j) are added, and the sum output is made a fuel flow rate set value (f'), and at the adder 14, the MWD (a) and the feed-back control signal (k) are added, and the sum output is made a water supply flow rate set value (g').;COPYRIGHT: (C)1997,JPO