IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0068337
(2008-02-05)
|
등록번호 |
US-9249738
(2016-02-02)
|
우선권정보 |
DE-10 2007 008 296 (2007-02-16) |
발명자
/ 주소 |
- Nemet, Anton
- Kokanovic, Stanka
|
출원인 / 주소 |
|
대리인 / 주소 |
Buchanan Ingersoll & Rooney PC
|
인용정보 |
피인용 횟수 :
1 인용 특허 :
5 |
초록
▼
The invention relates to a method for automatic closed-loop control of one or more combustion temperatures in a gas turbine installation, having the following steps: measurement of a plurality of temperatures of the working fluid of the gas turbine installation at various positions in the gas turbin
The invention relates to a method for automatic closed-loop control of one or more combustion temperatures in a gas turbine installation, having the following steps: measurement of a plurality of temperatures of the working fluid of the gas turbine installation at various positions in the gas turbine installation, measurement of a plurality of pressures of the working fluid at different positions in the gas turbine installation, determination of the water content of the working fluid flowing through the gas turbine installation, taking account of the measured values, and setting of at least one combustion temperature for the gas turbine installation as a function of the determined water content.
대표청구항
▼
1. A method for automatic closed-loop control of one or more combustion temperatures in a gas turbine installation, comprising: measuring a plurality of temperatures of a working fluid of the gas turbine installation at various positions in the gas turbine installation;measuring a plurality of press
1. A method for automatic closed-loop control of one or more combustion temperatures in a gas turbine installation, comprising: measuring a plurality of temperatures of a working fluid of the gas turbine installation at various positions in the gas turbine installation;measuring a plurality of pressures of the working fluid at different positions in the gas turbine installation;determining a water content of the working fluid flowing through the gas turbine using an indirect method based on turbine inlet pressure measurements to deduce the water content of the working fluid flowing through the turbine installation as a function of the temperatures and pressures measured at different respective locations in the gas turbine installation; andsetting of the one or more combustion temperatures for the gas turbine installation as a function of the determined water content,wherein a closed-loop control structure is defined for closed-loop control of the one or more combustion temperatures Tx, where Txis defined by: Tx=f1(T7)·f2(p6p7)·f3(T2)·f4(xd)where xd denotes the water content in the working fluid, T7 is the working fluid temperature at the turbine outlet, p6 is a turbine inlet pressure, p7 is a turbine outlet pressure, T2 is a compressor inlet temperature and f1, f2, f3 and f4 denote functions of the working fluid temperature at the turbine outlet, a ratio of the turbine inlet pressure and the turbine outlet pressure, the compressor inlet temperature, and the water content in the working fluid, respectively wherein a process of polytropic expansion of the working fluid in the turbine is approximated for a relevant operating range of the gas turbine, using an equation T6T7=(p6p7)n-1n=(p6p7)ηp·κ-1κ. 2. The method as claimed in claim 1, wherein the plurality of working fluid temperatures and the compressor inlet temperature or an ambient temperature are measured and are taken into account in the determination of the water content of the working fluid flowing through the gas turbine installation. 3. The method as claimed in claim 1, wherein the turbine inlet pressure, a compressor outlet pressure, a combustion chamber inlet pressure or a combustion chamber outlet pressure is measured and is taken into account in the determination of the water content of the working fluid flowing through the gas turbine installation. 4. The method as claimed in claim 1, wherein the turbine outlet pressure or an ambient pressure and a pressure loss from the turbine outlet to a chimney of the gas turbine installation is or are measured and is or are taken into account in the determination of the water content of the working fluid flowing through the gas turbine installation. 5. The method as claimed in claim 1, wherein the working fluid temperature at the turbine outlet and the turbine inlet pressure or a compressor outlet pressure or a combustion chamber inlet pressure or a combustion chamber outlet pressure, and the turbine outlet pressure or an ambient pressure and a pressure loss from the turbine outlet to a chimney and compressor inlet temperature or an ambient temperature are measured and are taken into account in the determination of the water content of the working fluid flowing through the gas turbine installation. 6. The method as claimed in claim 1, wherein ambient moisture is measured, and a value of the ambient moisture is used to compensate for ageing or dirt effects in the gas turbine. 7. The method as claimed in claim 1, wherein a pitch angle of a set of compressor inlet guide vanes for the gas turbine installation is measured and is used for calculating water content of the working fluid flowing through the gas turbine installation. 8. The method as claimed in claim 1, wherein mass flows of all amounts of water or vapor which are supplied and emitted are also taken into account in the determination of the water content of the working fluid flowing through the gas turbine installation. 9. The method as claimed in claim 8, wherein the mass flows includes water that is supplied as a consequence of an evaporation cooler. 10. The method as claimed in claim 8, wherein the mass flows includes water supplied by means of a fogging or high fogging system. 11. The method as claimed in claim 8, wherein the mass flows includes water which is emitted by virtue of a cooler. 12. The method as claimed in claim 8, wherein the mass flows includes water or vapor injection for increasing power or for closed-loop emission control either into a combustion chamber or into a cooling air system of the gas turbine. 13. A method for automatic closed-loop control of one or more combustion temperatures in a gas turbine installation, comprising: measuring a plurality of temperatures of a working fluid of the gas turbine installation at various positions in the gas turbine installation;measuring a plurality of pressures of the working fluid at different positions in the gas turbine installation;determining a water content of the working fluid flowing through the gas turbine using an indirect method based on turbine inlet pressure measurements to deduce the water content of the working fluid flowing through the turbine installation as a function of the temperatures and pressures measured at different respective locations in the gas turbine installation; andsetting of the one or more combustion temperature for the gas turbine installation as a function of the determined water content,wherein a working fluid temperature T7 is determined using an equation: T7=f1-1(Tx)·f2(p6p7)·f3(T2)·f4(xd) where xd denotes the water content in the working fluid, T7 is the working fluid temperature at the turbine outlet, p6 is a turbine inlet pressure, p7 is a turbine outlet pressure, T2 is a compressor inlet temperature and f1, f2, f3 and f4 denote functions of the working fluid temperature at the turbine outlet, a ratio of the turbine inlet pressure and the turbine outlet pressure, the compressor inlet temperature, and the water content in the working fluid, respectively, wherein one of the one or more combustion temperatures Tx are subjected to closed-loop control by comparing the working fluid temperature T7 determined using the equation directly with a measurement of the working fluid temperature T7 and using the closed control loop to adjust a fuel valve position. 14. The gas turbine installation as claimed in claim 13, conFIGUREd to provide sequential combustion. 15. The gas turbine installation as claimed in claim 13, comprising one combustion chamber. 16. The method as claimed in claim 13, wherein the plurality of working fluid temperatures and the compressor inlet temperature or an ambient temperature are/is measured and are/is taken into account in the determination of the water content of the working fluid flowing through the gas turbine installation. 17. The method as claimed in claim 13, wherein the turbine outlet pressure or an ambient pressure and pressure loss from the turbine outlet to a chimney of the gas turbine installation is or are measured and is or are taken into account in the determination of the water content of the working fluid flowing through the gas turbine installation. 18. The method as claimed in claim 13, wherein the plurality of working fluid temperatures at the turbine outlet and the turbine inlet pressure or a compressor outlet pressure or a combustion chamber inlet pressure or a combustion chamber outlet pressure, and the turbine outlet pressure or an ambient pressure and a pressure loss from the turbine outlet to a chimney and the compressor inlet temperature or an ambient temperature is or are measured and is or are taken into account in the determination of the water content of the working fluid flowing through the gas turbine installation. 19. The method as claimed in claim 13, wherein an ambient moisture is additionally measured, and a value of the ambient moisture is used to compensate for ageing or dirt effects in the gas turbine. 20. The method as claimed in claim 13, wherein a pitch angle of a set of compressor inlet guide vanes for the gas turbine installation is also measured and is used for calculating the water content of the working fluid flowing through the gas turbine installation. 21. The method as claimed in claim 13, wherein mass flows of all amounts of water or vapor which are supplied and emitted are also taken into account in the determination of the water content of the working fluid flowing through the gas turbine installation.
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