The combustion control system using pressure fluctuation monitoring system of the combustion chamber for M701F type gas-steam combined cycle unit made from Mitsubishi Corportation in Japan has been presented

and an approach to the principle and method for combustion adjustment being made.In the combustion adjustment

the regulating valve and by-pass valve for inlet guide blades of the air compressor are mainly adjusted

thereby

to ensure economic combustion and flow rate of the cooling air through the flow rate of air under condition of maintaining output capacity of the gas turbine not to be variated(the amount of fuel not variated as possible);during the preocess of combustion adjustment

the temperature control has to be considered

a suitable intermediate value has to be selected in the allowable range of temperature control

and in the load limited by the temperature

and the optimal combustion control is realized through changing the setting of bias in temperature control.