Patent ID: 7191588

Claim:
A combustor controller controlling a combustor, which is mounted to a gas turbine being installed to a same shaft of a generator, and supplying the relevant gas turbine with combustion gas so as to rotate it, comprising: a fuel flow rate operating section which sets a flow rate of fuel being supplied to said combustor based on a differential value between an output of said generator and an aimed output of said generator; a turbine inlet temperature operating section which determines a turbine inlet temperature serving as a temperature of combustion gas flowing into said gas turbine from said combustor based on a flow rate and a temperature of fuel and air, respectively, flowing into said combustor; a pilot ratio operating section which sets a pilot ratio serving as a ratio of a pilot fuel, being supplied to a pilot nozzle inside said combustor that performs diffusion combustion of a pilot light, versus entire fuel flow rate serving as a total of said pilot fuel and a main fuel, being supplied to a main nozzle inside said combustor that performs premixed combustion by mixing air and fuel, based on a turbine inlet temperature determined by said turbine inlet temperature operating section; and an air flow rate operating section which sets a flow rate of air flowing inside said combustor based on a turbine inlet temperature determined by said turbine inlet temperature operating section; and is characterized by: wherein, flow rates of said pilot fuel and said main fuel are controlled based on a pilot ratio determined by said pilot ratio operating section and said fuel flow rate determined by said fuel flow rate operating section; and wherein, combustion state of said combustor is controlled by controlling a flow rate of air flowing into inside of said combustor by air flow rate determined by said air flow rate operating section.