SYSTEMS AND METHODS TO RESPOND TO GRID OVERFREQUENCY EVENTS FOR A STOICHIOMETRIC EXHAUST RECIRCULATION GAS TURBINE
First Claim
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1. A method, comprising:
- combusting a fuel and an oxidant in a combustor of an exhaust gas recirculation (EGR) gas turbine system that produces electrical power and provides a portion of the electrical power to an electrical grid; and
controlling, via one or more processors, one or more parameters of the EGR gas turbine system to decrease the portion of the electrical power provided to the electrical grid in response to an over-frequency event associated with the electrical grid, wherein controlling the one or more parameters comprises decreasing a flow rate of fuel to the combustor in response to the over-frequency event.
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Abstract
A method includes combusting a fuel and an oxidant in a combustor of an exhaust gas recirculation (EGR) gas turbine system that produces electrical power and provides a portion of the electrical power to an electrical grid. The method further includes controlling, via one or more processors, one or more parameters of the EGR gas turbine system to decrease the portion of the electrical power provided to the electrical grid in response to an over-frequency event associated with the electrical grid, wherein controlling the one or more parameters comprises decreasing a flow rate of fuel to the combustor in response to the over-frequency event.
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Citations
20 Claims
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1. A method, comprising:
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combusting a fuel and an oxidant in a combustor of an exhaust gas recirculation (EGR) gas turbine system that produces electrical power and provides a portion of the electrical power to an electrical grid; and controlling, via one or more processors, one or more parameters of the EGR gas turbine system to decrease the portion of the electrical power provided to the electrical grid in response to an over-frequency event associated with the electrical grid, wherein controlling the one or more parameters comprises decreasing a flow rate of fuel to the combustor in response to the over-frequency event. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A system, comprising:
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an exhaust gas recirculation (EGR) gas turbine system, comprising; a combustor configured to receive and combust a fuel with an oxidant; a turbine driven by combustion products from the combustor; a generator driven via a shaft of the turbine, wherein the generator is configured to generate electrical power and to export a portion of the electrical power to an electrical grid; and a control system comprising one or more processors, the control system comprising; a droop governor control system configured to control the electrical power; and an equivalence ratio control system configured to control one or more parameters of the EGR gas turbine system to decrease the portion of the electrical power exported to the electrical grid in response to an over-frequency event, wherein the equivalence ratio control system is configured to provide control signals to decrease a flow rate of fuel to the combustor in response to the over-frequency event when the EGR gas turbine system is operating in stoichiometric mode. - View Dependent Claims (13, 14, 15, 16, 17)
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18. A non-transitory, computer readable medium storing instructions executable by one or more processors, the instructions including:
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instructions, that when executed by the one or more processors, cause the one or more processors to determine that an over-frequency event is occurring in an electrical grid coupled to an EGR gas turbine system; instructions, that when executed by the one or more processors, cause the one or more processors to decrease a flow rate of fuel to a combustor of the EGR gas turbine system in response to the over-frequency event; and instructions, that when executed by the one or more processors, cause the one or more processors to decrease a flow rate of oxidant to the combustor after decreasing the flow rate of fuel to the combustor, wherein the EGR gas turbine system is operating in a stoichiometric combustion mode. - View Dependent Claims (19, 20)
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Specification