Method of controlling a power generation system
First Claim
1. A method of controlling a gas turbine system, the method comprising:
- controlling an inlet guide vane position to maintain a turbine exhaust temperature at a corrected value that is a function of a compressor inlet temperature and a turbine normalized load.
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Accused Products
Abstract
A method of controlling a gas turbine system (10) may include controlling an inlet guide vane position (98) to maintain a turbine (24) exhaust temperature at a corrected value that is a function of a compressor (12) inlet temperature and a turbine (24) normalized load. The method may include selecting the minimum value (138) of a part load tunable value, a part load maximum value and a fixed maximum value of a turbine (24) exhaust temperature for the corrected value. A corrected value setpoint may be determined (94) for the gas turbine system (10) operating at a part load condition where at least one of a fuel flow rate and the inlet guide vane position is controlled (98) so the corrected value does not exceed the corrected value setpoint. The corrected value may prevent a turbine (24) engine from exceeding its firing temperature during operation and ensure the engine operates within combustor dynamics and emissions limits.
47 Citations
21 Claims
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1. A method of controlling a gas turbine system, the method comprising:
controlling an inlet guide vane position to maintain a turbine exhaust temperature at a corrected value that is a function of a compressor inlet temperature and a turbine normalized load. - View Dependent Claims (2, 3, 4, 5)
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6. A method of controlling a gas turbine system comprising a compressor receiving air through inlet guide vanes, a combustor receiving compressed air from the combustor and fuel from a fuel system to produce hot combustion gas, and a turbine for expanding the hot combustion gas to extract work, the method comprising:
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determining a corrected turbine exhaust temperature setpoint;
calculating a corrected turbine exhaust temperature; and
controlling at least one of an inlet guide vane position and a fuel flow rate to maintain the corrected turbine exhaust temperature within a limit of the corrected turbine exhaust temperature setpoint. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13)
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14. A closed loop inlet guide vane control apparatus for a gas turbine engine, the apparatus comprising:
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an inlet guide vane positioner;
an inlet guide vane position sensor;
a combustor inlet temperature sensor;
a turbine outlet temperature sensor; and
a processor responsive to a signal from the turbine outlet temperature sensor and a signal from the combustor inlet temperature sensor to produce an output signal for controlling the inlet guide vane positioner. - View Dependent Claims (15, 16)
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17. A method of controlling a gas turbine engine, the method comprising:
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calculating normalized power level as a function of a maximum power level achievable at a given ambient temperature;
controlling combustion in a combustor of the gas turbine engine to maintain an average blade path temperature below a predetermined maximum temperature;
controlling fuel delivery to the combustor in response to a power level demand; and
controlling inlet guide vane position to regulate a temperature responsive to a flame temperature in the combustor to a set point temperature compensated for a temperature responsive to inlet air temperature and for normalized power level. - View Dependent Claims (18, 19, 20, 21)
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Specification