Gas turbine control device

A gas turbine control device for controlling a gas turbine including a combustor capable of co-firing a first fuel and a second fuel having a lower calorific value per unit volume than the first fuel, the gas turbine control device comprising:

• a reference value calculation unit for calculating a reference value for a control parameter that is a pilot fuel distribution ratio with respect to a pilot fuel injection nozzle among a plurality of fuel injection nozzles included in the combustor, the reference value corresponding to a case where the first fuel is exclusively combusted;
• a correction value calculation unit for calculating a correction value for correcting the reference value such that the control parameter becomes larger than the reference value and a deviation amount from the reference value increases as a co-firing ratio of the second fuel increases;
• and
• a control unit for controlling the gas turbine to perform a partial load operation based on the control parameter obtained by correcting the reference value using the correction value.

A gas turbine control device for controlling a gas turbine including a combustor capable of co-firing a first fuel and a second fuel having a lower calorific value per unit volume than the first fuel, the gas turbine control device comprising:

• a reference value calculation unit for calculating a reference value for a control parameter that is an opening degree of an inlet guide vane of the gas turbine, the reference value corresponding to a case where the first fuel is exclusively combusted;
• a correction value calculation unit for calculating a correction value for correcting the reference value such that the control parameter becomes larger than the reference value and a deviation amount from the reference value increases as a co-firing ratio of the second fuel increases;
• and
• a control unit for controlling the gas turbine based on the control parameter obtained by correcting the reference value using the correction value.

A gas turbine control device for controlling a gas turbine including a combustor capable of co-firing a first fuel and a second fuel having a lower calorific value per unit volume than the first fuel, the gas turbine control device comprising:

• a reference value calculation unit for calculating a reference value for a control parameter including at least one of a pilot fuel distribution ratio with respect to a pilot fuel injection nozzle among a plurality of fuel injection nozzles included in the combustor, a top hat fuel distribution ratio with respect to a top hat fuel injection nozzle among the plurality of fuel injection nozzles, a fuel distribution ratio between main nozzle groups among the plurality of fuel injection nozzles, or an opening degree of an inlet guide vane of the gas turbine, the reference value corresponding to a case where the first fuel is exclusively combusted;
• a correction value calculation unit for calculating a correction value for correcting the reference value such that the control parameter becomes larger than the reference value and a deviation amount from the reference value increases as a co-firing ratio of the second fuel increases;
• and
• a control unit for controlling the gas turbine based on the control parameter obtained by correcting the reference value using the correction value.

A gas turbine control device for controlling a gas turbine including a combustor capable of co-firing a first fuel and a second fuel having a lower calorific value per unit volume than the first fuel, the gas turbine control device comprising:

• a reference value calculation unit for calculating a reference value for a control parameter that is a top hat fuel distribution ratio with respect to a top hat fuel injection nozzle among a plurality of fuel injection nozzles included in the combustor, the reference value corresponding to a case where the first fuel is exclusively combusted;
• a correction value calculation unit for calculating a correction value for correcting the reference value such that the control parameter becomes smaller than the reference value and a deviation amount from the reference value increases as a co-firing ratio of the second fuel increases;
• and
• a control unit for controlling the gas turbine based on the control parameter obtained by correcting the reference value using the correction value.