Gas turbine control device, gas turbine control method, and storage medium
AssigneeMitsubishi Heavy Industries, Ltd.
InventorsRei Ikeda, Masahiko Nakahara
Life of this patent
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Abstract
A gas turbine includes a purge gas supply system for supplying purge gas to a fuel oil injection nozzle for injecting fuel oil to a combustion chamber. A gas turbine control device sets a supply pressure target value of purge gas, based on the operating state acquired from the gas turbine, and controls a purge gas supply pressure adjustment part so that supply pressure of purge gas becomes the supply pressure target value. The increase rate of the supply pressure target value is limited to be less than or equal to an increase rate upper limit. The increase rate upper limit is corrected so that the increase rate upper limit is increased when it is determined that the correction is necessary based on the operating state.
Claims11
A gas turbine control device for controlling a gas turbine that includes:
- a combustor having a fuel oil injection nozzle for injecting fuel oil into a combustion chamber;
- a fuel oil supply system for supplying the fuel oil to the fuel oil injection nozzle;
- a purge gas supply system for supplying purge gas to the fuel oil injection nozzle;
- and
- a purge gas supply pressure adjustment part for adjusting supply pressure of the purge gas;
- the gas turbine control device comprising:
- an operating state acquisition part for acquiring an operating state of the gas turbine;
- a supply pressure target value setting part for setting a supply pressure target value of the purge gas, based on the operating state;
- an increase rate limiting part for obtaining a limited supply pressure target value by limiting an increase rate of the supply pressure target value to be less than or equal to an increase rate upper limit;
- a determination part for determining whether correction of the increase rate upper limit is necessary, based on the operating state;
- an increase rate upper limit correction part for correcting the increase rate upper limit so that the increase rate upper limit is increased if it is determined by the determination part that the correction is necessary;
- and
- a control part for controlling the purge gas supply pressure adjustment part so that the supply pressure of the purge gas becomes the limited supply pressure target value.
A gas turbine control method for controlling a gas turbine that includes:
- a combustor having a fuel oil injection nozzle for injecting fuel oil into a combustion chamber;
- a fuel oil supply system for supplying the fuel oil to the fuel oil injection nozzle;
- a purge gas supply system for supplying purge gas to the fuel oil injection nozzle;
- and
- a purge gas supply pressure adjustment part for adjusting supply pressure of the purge gas;
- the gas turbine control method comprising:
- a step of acquiring an operating state of the gas turbine;
- a step of setting a supply pressure target value of the purge gas, based on the operating state;
- a step of obtaining a limited supply pressure target value by limiting an increase rate of the supply pressure target value to be less than or equal to an increase rate upper limit;
- a step of determining whether correction of the increase rate upper limit is necessary, based on the operating state;
- a step of correcting the increase rate upper limit so that the increase rate upper limit is increased if it is determined that the correction is necessary;
- and
- a step of controlling the purge gas supply pressure adjustment part so that the supply pressure of the purge gas becomes the limited supply pressure target value.
A computer-readable storage medium that stores a gas turbine control program for controlling a gas turbine that includes:
- a combustor having a fuel oil injection nozzle for injecting fuel oil into a combustion chamber;
- a fuel oil supply system for supplying the fuel oil to the fuel oil injection nozzle;
- a purge gas supply system for supplying purge gas to the fuel oil injection nozzle;
- and
- a purge gas supply pressure adjustment part for adjusting supply pressure of the purge gas;
- the gas turbine control program being capable of causing a computer device to execute:
- a step of acquiring an operating state of the gas turbine;
- a step of setting a supply pressure target value of the purge gas, based on the operating state;
- a step of obtaining a limited supply pressure target value by limiting an increase rate of the supply pressure target value to be less than or equal to an increase rate upper limit;
- a step of determining whether correction of the increase rate upper limit is necessary, based on the operating state;
- a step of correcting the increase rate upper limit so that the increase rate upper limit is increased if it is determined that the correction is necessary;
- and
- a step of controlling the purge gas supply pressure adjustment part so that the supply pressure of the purge gas becomes the limited supply pressure target value.
Dependencies are inferred from the claim text.