Systems and methods to improve shut-down purge flow in a gas turbine system
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F02C-009/28
F01D-021/00
F01D-025/30
F02C-009/00
F02C-009/48
F22B-035/00
F01K-013/00
F01K-023/10
F02C-006/18
G05B-015/02
출원번호
US-0247129
(2016-08-25)
등록번호
US-10082087
(2018-09-25)
발명자
/ 주소
Alexander, Michael Joseph
Davis, Jr., Lewis Berkley
Snider, David August
출원인 / 주소
GENERAL ELECTRIC COMPANY
대리인 / 주소
Fletcher Yoder, P.C.
인용정보
피인용 횟수 :
0인용 특허 :
5
초록▼
A system includes a controller including a memory storing instructions and a processor that executes the instructions. The instructions cause the controller to receive a first input signal of a first temperature at an inlet of a gas turbine of a gas turbine and heat recovery steam generator (HRSG) s
A system includes a controller including a memory storing instructions and a processor that executes the instructions. The instructions cause the controller to receive a first input signal of a first temperature at an inlet of a gas turbine of a gas turbine and heat recovery steam generator (HRSG) system and a second input signal of a rotational speed of the gas turbine. The instructions also cause the controller to calculate the exhaust flow rate of the gas turbine and HRSG system based on the first input signal and the second input signal. Further, the instructions cause the controller to control the gas turbine and HRSG system to isolate a fuel source at a portion of normal operating speed of the gas turbine sufficient to achieve a predetermined purging volume during coast down of air flow through the gas turbine and HRSG system based on the exhaust flow rate.
대표청구항▼
1. A system, comprising: a controller of a gas turbine and heat recovery steam generator (HRSG) system, comprising: a memory storing instructions to perform operations of the gas turbine and HRSG system; anda processor configured to execute the instructions, wherein the instructions, when executed b
1. A system, comprising: a controller of a gas turbine and heat recovery steam generator (HRSG) system, comprising: a memory storing instructions to perform operations of the gas turbine and HRSG system; anda processor configured to execute the instructions, wherein the instructions, when executed by the processor, cause the controller to: receive a first input signal representative of a first temperature at an inlet of a compressor section of a gas turbine of the gas turbine and HRSG system and a second input signal representative of a rotational speed of the gas turbine;calculate an exhaust flow rate of the gas turbine and HRSG system based on at least the first input signal and the second input signal; andcontrol the gas turbine and HRSG system, during shut-down of the gas turbine and HRSG system, to isolate a fuel source from the gas turbine at a portion of normal operating speed of the gas turbine sufficient to achieve a predetermined purging volume during coast down of air flow through the gas turbine and HRSG system based on the exhaust flow rate. 2. The system of claim 1, wherein the instructions, when executed by the processor, cause the controller to receive a third input signal representative of a second temperature at an exhaust flow path of the gas turbine and HRSG system. 3. The system of claim 2, comprising: a first temperature sensor that provides the first input signal, wherein the first temperature sensor is positioned at the inlet of the compressor section of the gas turbine;a rotational speed sensor that provides the second input signal; anda second temperature sensor that provides the third input signal, wherein the second temperature sensor is positioned along an exhaust of the gas turbine or an exhaust stack of an HRSG of the gas turbine and HRSG system. 4. The system of claim 2, wherein the exhaust flow rate is calculated based on at least the third input signal in addition to the first input signal and the second input signal. 5. The system of claim 1, wherein the predetermined purging volume is based on at least a volume of the HRSG. 6. The system of claim 1, wherein the instructions, when executed by the processor, cause the controller to control the gas turbine and HRSG system to isolate the fuel source when the gas turbine reaches the portion of normal operating speed of the gas turbine sufficient to achieve the purging volume while the gas turbine operates at a rotational speed greater than a minimum purge flow requirement of the gas turbine. 7. The system of claim 1, wherein the instructions, when executed by the processor, cause the controller to maintain the gas turbine at or above a minimum purge flow speed until the purge volume is achieved. 8. A method, comprising: utilizing a controller to: receive a first measurement of a first temperature of a gas turbine and heat recovery steam generator (HRSG) system from a first sensor, wherein the measurement of the first temperature comprises at least a temperature at an inlet of a gas turbine of the gas turbine and HRSG system;receive a second measurement of a rotational speed of the gas turbine from a second sensor;calculate an exhaust volume flow rate of the gas turbine and HRSG system based on at least the first temperature and the rotational speed of the gas turbine;obtain a purging volume of the gas turbine and HRSG system that is based on at least a volume of an HRSG of the gas turbine and HRSG system; andcontrol the gas turbine and HRSG system, during shut-down of the gas turbine and HRSG system, to isolate a fuel source from the gas turbine at a portion of normal operating speed of the gas turbine of the gas turbine and HRSG system sufficient to achieve the purging volume during coast down of air flow through the gas turbine and HRSG system based on the exhaust volume flow rate. 9. The method of claim 8, wherein the first sensor comprises a temperature sensor positioned at an inlet of a compressor section of the gas turbine, and the second sensor comprises a rotational speed sensor of the gas turbine. 10. The method of claim 8, comprising utilizing the controller to receive a third measurement of a second temperature of the gas turbine and HRSG system from a third sensor, wherein the third sensor comprises a temperature sensor positioned at an exhaust of the gas turbine or an exhaust stack of the HRSG, and calculating the exhaust volume flow rate of the gas turbine and HRSG system is based on at least the third parameter. 11. The method of claim 8, wherein the second sensor comprises a rotational speed sensor of the gas turbine. 12. The method of claim 8, wherein controlling the gas turbine and HRSG system to isolate the fuel source at a portion of normal operating speed of the gas turbine is based at least in part on a deceleration rate of a rotational speed of the gas turbine after the fuel source is isolated. 13. The method of claim 8, wherein instructing the gas turbine and HRSG system to isolate the fuel occurs when the gas turbine reaches the portion of normal operating speed of the gas turbine sufficient to achieve the purging volume while the gas turbine operates at a rotational speed greater than a minimum purging speed of the gas turbine. 14. A tangible, non-transitory, machine-readable-medium, comprising machine-readable instructions to: receive a first measurement of a first temperature of a power generation system from a first sensor;receive a second measurement of a rotational speed of a gas turbine of the power generation system from a second sensor;calculate an exhaust flow rate of the power generation system based on at least the first temperature and the rotational speed of the gas turbine; andcontrol the power generation system, during shut-down of the power generation system, to isolate a fuel source from the gas turbine at a portion of normal operating speed of the power generation system sufficient to achieve a purging volume during coast down of air flow through the power generation system based on at least the exhaust flow rate. 15. The machine-readable-medium of claim 14, wherein the purging volume is based on at least a volume of a defined portion of the power generation system that comprises a heat recovery steam generator. 16. The machine-readable-medium of claim 14, wherein the power generation system comprises a gas turbine and a heat recovery steam generator. 17. The machine-readable-medium of claim 14, wherein the first sensor comprises a first temperature sensor positioned at an inlet of a compressor section of a gas turbine of the power generation system. 18. The machine-readable-medium of claim 14, wherein the second sensor comprises a rotational speed sensor configured to measure a rotational speed of a gas turbine of the power generation system. 19. The machine-readable-medium of claim 14, wherein the purging volume is achieved while the power generation system remains at a speed greater than a minimum purging speed of the power generation system. 20. The machine-readable-medium of claim 14, comprising machine-readable instructions to: receive a third measurement of a second temperature of the power generation system from a third sensor, wherein the third sensor comprises a second temperature sensor positioned at an exhaust of a gas turbine of the power generation system or an exhaust stack of a heat recovery steam generator of the power generation system, and wherein calculating the exhaust flow rate of the power generation system is based on at least the third measurement.
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이 특허에 인용된 특허 (5)
Holt, Joel Donnell; Smith, Gordon Raymond, Combined cycle power plant.
Snider, David August; Morawski, Christopher John, Method for meeting a purge flow requirement for a power plant and a power plant having a purge control system.
Law, Joseph Robert; Brooks, Robert Lester; Hamil, Earl Jay; Danner, Lawrence Melville; Ervin, Amie Leavengood, System and methods for heat recovery steam generators hot purging.
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