| 摘要 |
PURPOSE:To aim at optimizing the control of temperature of combustion gas of a gas turbine, by computing a variation in the temperature of exhaust gas due to a variation in the relative humidity of air at the inlet of a gas turbine compressor to compensate the instruction value of exhaust gas temperature control. CONSTITUTION:The relative humidity of air at the inlet of a gas turbine compressor is detected and is transmitted to a second function unit 20 which computes and delivers an exhaust gas temperature change control signal DELTATX upon the relative humidity being phi. An adder adds DELTATX to an exhaust gas temperature signal TX0 which is obtained from a first function unit 19 when the relative humidity is zero, and delivers an exhaust gas temperature control signal TX upon the relative humidity being phi%. A comparator 17 compares this control signal with an exhaust gas temperature signal TXM from an intermediate value selector 15 to control the supply amount of fuel. With this arrangement the temperature of combustion gas is controlled to be optimum irrespective of the relative humidity of air at the inlet of the gas turbine. |
