Patent ID: 8694170

Claim:
An operation control device for a gas turbine that drives a generator by rotating a turbine with combustion gas generated in a combustor by supplying the combustor with fuel and compressed air from a compressor provided with an inlet guide vane at a front stage, the operation control device for a gas turbine comprising: an inlet guide vane (IGV) control flag generator configured to activate an inlet guide vane emergency fully-open flag when a system frequency drops to or below a predetermined threshold value and an output of the generator is in a load band at or above a predetermined value, or when the system frequency drops to or below the predetermined threshold value and a degree of opening of the inlet guide vane is set to a predetermined standard fully-open degree of opening; an inlet guide vane degree-of-opening setting portion configured to, when the inlet guide vane emergency fully-open flag is active, set the degree of opening of the inlet guide vane to an emergency fully-open degree of opening, which is greater than the standard fully-open degree; a temperature controller configured to generate an exhaust gas temperature setting value or a blade path temperature setting value for the turbine; and a fuel controller configured to control an amount of fuel to be supplied to the combustor based on the exhaust gas temperature setting value or the blade path temperature setting value; wherein the temperature controller includes: a switching portion configured to switch functions in accordance with the degree-of-opening of the inlet guide vane; a setting portion configured to set a temperature adjustment setting by using the function set by the switching portion; a setting value generation portion configured to generate the exhaust gas temperature setting value or the blade path temperature setting value for the turbine by using the temperature adjustment setting set by the setting portion.