GAS TURBINE EQUIPMENT, DEVICE AND METHOD FOR CONTROLLING FUEL GAS OF THE SAME

摘要

PROBLEM TO BE SOLVED: To stably combust a gas turbine combustor even when calories of a main fuel gas suddenly and greatly change.

SOLUTION: A fuel gas control device includes: a main control unit 110 that adjusts a flow volume of a control gas to be fed to a main fuel gas line 20 by control gas adjusting valves 31, 41 to control a unit calorie of a fuel gas flowing into a gas turbine 10 to be closer to a set calorie; a single component calorie computing unit 123 that obtains a unit calorie of a single BFG (Blast Furnace Gas) by using the unit calorie of the fuel gas and the gas flow volume of the control gas; and a valve regulation control unit 125 that preferentially instructs full-closing of the control gas adjusting valves with respect to an instruction on the control gas adjusting valves by the main control unit, under the condition that the unit calorie of the fuel gas exceeds a predetermined regulation value. The valve regulation control unit 125 does not instruct full-closing of the control gas adjusting valves if the level of the unit calorie of the fuel gas on a basis of a set calorie is opposite to the regulation value, regardless of the above condition being satisfied.

COPYRIGHT: (C)2013,JPO&INPIT