초록 ▼

Ambient air is compressed into a compressed ambient gas flow with a main air compressor. The compressed ambient gas flow having a compressed ambient gas flow rate is delivered to a turbine combustor and mixed with a fuel stream having a fuel stream flow rate and a portion of a recirculated gas flow

Ambient air is compressed into a compressed ambient gas flow with a main air compressor. The compressed ambient gas flow having a compressed ambient gas flow rate is delivered to a turbine combustor and mixed with a fuel stream having a fuel stream flow rate and a portion of a recirculated gas flow to form a combustible mixture. The combustible mixture is burned and forms the recirculated gas flow that drives a turbine. The recirculated gas flow is recirculated from the turbine to the turbine compressor using a recirculation loop. At least one emission level is measured by at least a first emission sensor in the recirculated gas flow and at least a first control signal is generated. The fuel stream flow rate is adjusted based on the at least a first control signal to achieve substantially stoichiometric combustion.

대표청구항 ▼

1. A method for controlling a stoichiometric exhaust gas recirculation power plant arrangement, comprising the steps of: compressing ambient air into a compressed ambient gas flow with at least one main air compressor;delivering at least a first portion of the compressed ambient gas flow, with a com

1. A method for controlling a stoichiometric exhaust gas recirculation power plant arrangement, comprising the steps of: compressing ambient air into a compressed ambient gas flow with at least one main air compressor;delivering at least a first portion of the compressed ambient gas flow, with a compressed ambient gas flow rate, to a turbine combustor that is fluidly connected to the at least one main air compressor via a turbine compressor bypass conduit;delivering a fuel stream, having a fuel stream flow rate, to the turbine combustor for mixing with the at least a first portion of the compressed ambient gas flow and with at least a first portion of a recirculated gas flow to form a combustible mixture;burning the combustible mixture in the turbine combustor and thereby forming the recirculated gas flow and driving a turbine connected to a turbine compressor via a turbine shaft;recirculating the recirculated gas flow from the turbine to the turbine compressor using a recirculation loop;measuring at least one emission level by at least a first emission sensor in the recirculated gas flow;using the at least one emission level measured by the at least a first emission sensor to generate at least a first control signal; andadjusting the fuel stream flow rate based on the at least a first control signal to achieve substantially stoichiometric combustion. 2. The method of claim 1, further comprising delivering a secondary flow through a secondary flow path, wherein the secondary flow path delivers at least a second portion of the recirculated gas flow from the turbine compressor to the turbine for cooling and sealing the turbine and thereafter into the recirculation loop. 3. The method of claim 1, wherein the step of adjusting the fuel stream flow rate further comprises adjusting one or more gas control valves. 4. The method of claim 1, further comprising adjusting the compressed ambient gas flow rate based on the at least a first control signal. 5. The method of claim 4, wherein the step of adjusting the compressed ambient gas flow rate further comprises adjusting a plurality of inlet guide vanes of the at least one main air compressor. 6. The method of claim 1, further comprising measuring at least a second emission level by at least a second emission sensor in the recirculated gas flow and using the at least a second emission level measured by the at least a second emission sensor to generate at least a second control signal. 7. The method of claim 6, further comprising adjusting the compressed ambient gas flow rate based on the at least a second control signal. 8. A method for controlling at least one master train of a stoichiometric exhaust gas recirculation power plant arrangement, comprising the steps of: compressing ambient air into a compressed ambient gas flow with at least one main air compressor;delivering at least a first portion of the compressed ambient gas flow, with a master compressed ambient gas flow rate, to a master turbine combustor that is fluidly connected to the at least one main air compressor via a master turbine compressor bypass conduit;delivering a master fuel stream, having a master fuel stream flow rate, to the master turbine combustor for mixing with the at least a first portion of the compressed ambient gas flow and with at least a first portion of a master recirculated gas flow to form a master combustible mixture;burning the master combustible mixture in the master turbine combustor and thereby forming the master recirculated gas flow and driving a master turbine connected to a master turbine compressor via a master turbine shaft;recirculating the master recirculated gas flow from the master turbine to the master turbine compressor using a master recirculation loop;measuring at least one master emission level by at least a first master emission sensor in the master recirculated gas flow;using the at least one master emission level measured by the at least a first master emission sensor to generate at least a first master control signal; andadjusting the master fuel stream flow rate based on the at least a first master control signal to achieve substantially stoichiometric combustion. 9. The method of claim 8, further comprising delivering a master secondary flow through a master secondary flow path, wherein the master secondary flow path delivers at least a second portion of the master recirculated gas flow from the master turbine compressor to the master turbine for cooling and sealing the master turbine and thereafter into the master recirculation loop. 10. The method of claim 8, wherein the step of adjusting the master fuel stream flow rate further comprises adjusting one or more master gas control valves. 11. The method of claim 8, further comprising adjusting the compressed ambient gas flow rate based on the at least a first master control signal. 12. The method of claim 11, wherein the step of adjusting the compressed ambient gas flow rate further comprises adjusting a plurality of inlet guide vanes of the at least one main air compressor. 13. The method of claim 8, further comprising measuring at least a second master emission level by at least a second master emission sensor in the master recirculated gas flow and using the at least a second master emission level measured by the at least a second master emission sensor to generate at least a second master control signal. 14. The method of claim 13, further comprising adjusting the compressed ambient gas flow rate based on the at least a second master control signal. 15. The method of claim 8, further comprising controlling at least one slave train of a stoichiometric exhaust gas recirculation power plant arrangement, comprising the steps of: delivering at least a second portion of the compressed ambient gas flow, with a slave compressed ambient gas flow rate, to a slave turbine combustor that is fluidly connected to the at least one main air compressor via a slave turbine compressor bypass conduit;delivering a slave fuel stream, having a slave fuel stream flow rate, to the slave turbine combustor for mixing with the at least a second portion of the compressed ambient gas flow and with at least a first portion of a slave recirculated gas flow to form a slave combustible mixture;burning the slave combustible mixture in the slave turbine combustor and thereby forming the slave recirculated gas flow and driving a slave turbine connected to a slave turbine compressor via a slave turbine shaft;recirculating the slave recirculated gas flow from the slave turbine to the slave turbine compressor using a slave recirculation loop;measuring at least one slave emission level by at least a first slave emission sensor in the slave recirculated gas flow;using the at least one slave emission level measured by the at least a first slave emission sensor to generate at least a first slave control signal; andadjusting the slave fuel stream flow rate based on the at least a first slave control signal to achieve substantially stoichiometric combustion. 16. The method of claim 15, further comprising delivering a slave secondary flow through a slave secondary flow path, wherein the slave secondary flow path delivers at least a second portion of the slave recirculated gas flow from the slave turbine compressor to the slave turbine for cooling and sealing the slave turbine and thereafter into the slave recirculation loop. 17. The method of claim 15, wherein the step of adjusting the slave fuel stream flow rate further comprises adjusting one or more slave gas control valves. 18. The method of claim 15, further comprising adjusting a plurality of inlet guide vanes of the slave turbine compressor based on the at least a first slave control signal. 19. The method of claim 15, further comprising measuring at least a second slave emission level by at least a second slave emission sensor in the slave recirculated gas flow and using the at least a second slave emission level measured by the at least a second slave emission sensor to generate at least a second slave control signal. 20. A stoichiometric exhaust gas recirculation power plant arrangement, comprising: at least one main air compressor for compressing ambient air into a compressed ambient gas flow; andone or more gas turbine assemblies, each comprising: a turbine compressor bypass conduit;a turbine combustor, fluidly connected to the at least one main air compressor via the turbine compressor bypass conduit, for mixing at least a first portion of the compressed ambient gas flow, having a compressed ambient gas flow rate, with at least a first portion of a recirculated gas flow and a fuel stream, having a fuel stream flow rate, to form a combustible mixture and for burning the combustible mixture and forming the recirculated gas flow;a turbine connected to the turbine combustor and to a turbine shaft, and being arranged to be driven by the recirculated gas flow from the turbine combustor;a turbine compressor, fluidly connected to the turbine combustor, and connected to the turbine shaft and being arranged to be driven thereby;a recirculation loop for recirculating the recirculated gas flow from the turbine to the turbine compressor; anda controller, configured to adjust the fuel stream flow rate to achieve substantially stoichiometric combustion, using at least a first control signal generated by a first emission sensor measuring at least one emission level in the recirculated gas flow.