Method for controlling gas turbine power plant, gas turbine power plant, method for controlling carbon-containing fuel gasifier, and carbon-containing fuel gasifier

A method for controlling a gas turbine power plant equipped with

• a carbon-containing fuel gasifier including a gasifier unit that gasifies a fuel containing carbon to produce a synthetic gas and a coolant wall that is disposed on the gasifier unit and to which a coolant is directed,
• a combustor that combusts the synthetic gas to produce combustion gas,
• a gas turbine that is rotated by the combustion gas produced by the combustor, and
• a power-generating unit that generates electrical power as the gas turbine is rotated,
• the method comprising:
• controlling the amount of fuel fed to the carbon-containing fuel gasifier depending on the amount of heat absorbed by the coolant directed to the coolant wall.

A gas turbine power plant comprising:

• a carbon-containing fuel gasifier including a gasifier unit that gasifies a fuel containing carbon to produce a synthetic gas and a coolant wall that is disposed on the gasifier unit and to which a coolant is directed;
• a combustor that combusts the synthetic gas to produce combustion gas;
• a gas turbine that is rotated by the combustion gas produced by the combustor;
• a power-generating unit that generates electrical power as the gas turbine is rotated;
• and
• a control unit that controls the amount of fuel fed to the carbon-containing fuel gasifier depending on the amount of heat absorbed by the coolant directed to the coolant wall.