Control device, system, control method, power control device, gas turbine, and power control method

A control device of a system in which intake-air is compressed into compressed air by a compressor, fuel supplied from a combustor and the compressed air are mixed and the resultant mixture is combusted to generate a combustion gas, and a turbine is operated by the combustion gas that is generated,

• wherein the control device executes load control of allowing an operation control point for operation control of the system to vary in response to a load of the system, and
• the operation of the system is controlled on the basis of,
• a rated temperature adjustment line for temperature adjustment control of a flue gas temperature at a predetermined load to a rated flue gas temperature at which performance of the system becomes rated performance,
• a preceding setting line for setting of the flue gas temperature at the predetermined load to a preceding flue gas temperature that becomes lower in precedence to the rated flue gas temperature, and
• a limit temperature adjustment line for temperature adjustment control so that the flue gas temperature at the predetermined load does not exceed a limit flue gas temperature that is higher than the rated flue gas temperature.