Apparatus for the prevention of critical process variable excursions in one or more turbomachines
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F02C-009/00
F01D-017/00
출원번호
UP-0427515
(2006-06-29)
등록번호
US-7594386
(2009-10-12)
발명자
/ 주소
Narayanan, Krishnan
Fisher, Paul F
출원인 / 주소
Compressor Controls Corporation
대리인 / 주소
Sturm & Fix LLP
인용정보
피인용 횟수 :
60인용 특허 :
10
초록▼
Many variables in processes such as those using turbocompressors and turbines must be limited or constrained. Limit control loops are provided for the purpose of limiting these variables. By using a combination of closed loop and open loop limit control schemes, excursions into unfavorable operation
Many variables in processes such as those using turbocompressors and turbines must be limited or constrained. Limit control loops are provided for the purpose of limiting these variables. By using a combination of closed loop and open loop limit control schemes, excursions into unfavorable operation can be more effectively avoided. Transition between open loop and closed loop may be enhanced by testing the direction and magnitude of the rate at which the limit variable is changing. If the rate of change indicates recovery is imminent, control is passed back to the closed loop limit control function.
대표청구항▼
We claim: 1. An apparatus for providing limit control, not antisurge control, of a compression process having a limit variable, L, values of said limit variable being divided into a first region wherein closed loop limit control is used and a second region in which open loop limit control is used,
We claim: 1. An apparatus for providing limit control, not antisurge control, of a compression process having a limit variable, L, values of said limit variable being divided into a first region wherein closed loop limit control is used and a second region in which open loop limit control is used, the apparatus comprising: (a) a first calculator for calculating the value of the limit variable, L, based on parameters associated with a turbocompressor; (b) a closed loop limit controller in effect when the value of the limit variable, L, is in the first region; and (c) an open loop limit controller in effect when the value of the limit variable, L, is in the second region. 2. The apparatus of claim 1 including means to return control to the closed loop controller when the value of a limit variable, L, returns in the first region. 3. The apparatus of claim 1 wherein the open loop limit controller comprises means for changing a value of a manipulated variable as quickly as possible a predetermined increment. 4. The apparatus of claim 3 including a second calculator for determining a variable predetermined increment during operation. 5. The apparatus of claim 1 including a suction pressure sensor for sensing a suction pressure of the turbocompressor as the limit variable, L. 6. The apparatus of claim 1 including a discharge pressure sensor for sensing a discharge pressure of the turbocompressor as the limit variable, L. 7. The apparatus of claim 1 wherein the turbocompressor comprises a plurality of stages and the apparatus additionally comprises an interstage pressure sensor for sensing an interstage pressure of the turbocompressor as the limit variable, L. 8. A apparatus for providing limit control of a process having a limit variable, L, values of said limit variable being divided into a first region wherein closed loop limit control is used and a second region in which open loop limit control is used, the apparatus comprising: (a) an open loop limit controller, in effect when the value of a limit variable, L, is in the second region; (b) a derivative calculator for calculating a value of a first temporal derivative, dL/dt, of the limit variable, L; and (c) a closed loop limit controller in effect if the value of the first temporal derivative, dL/dt, has a sign indicating the value of L is changing toward the first region. 9. The apparatus of claim 8 wherein the values of the limit variable, L, are divided into three regions: a first region wherein closed loop limit control is used and a second region in which open loop limit control is used, and a third region wherein no limit control is required, the apparatus additionally comprising: (a) means for setting a closed loop limit control set point in a neighborhood of a boundary between the first and third regions; (b) means for setting an open loop limit control set point toward the second region relative to the closed loop limit control set point; and (c) an open loop limit controller in effect when a value of a limit variable, L, is at the open loop limit control set point or on an opposite side of the open loop limit control set point relative to the closed loop limit control set point. 10. The apparatus of claim 8 additionally comprising a comparator for testing a magnitude of dL/dt before providing closed loop limit control. 11. The apparatus of claim 8 additionally comprising a function calculator for determining a set point for the closed loop limit controller as a function of dL/dt. 12. The apparatus of claim 8 additionally comprising a function calculator for determining a set point for the open loop limit controller as a function of dL/dt. 13. The apparatus of claim 10 additionally comprising a logic function for bounding a set point for the closed loop limit controller. 14. The apparatus of claim 11 additionally comprising a logic function for bounding a set point for the open loop limit controller. 15. The apparatus of claim 8 additionally comprising a manipulated variable, M, adjusted to control the value of the limit variable, L.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (10)
Schroeder Ulrich,FRX, Device for sensing the angular position for controlling a synchronous motor excited by a permanent magnet.
Kohler Rolf (Schwieberdingen DEX) Schmidt Peter J. (Schwieberdingen DEX) Schmitt Manfred (Schwieberdingen DEX), Method and apparatus for controlling the operating characteristic quantities of an internal combustion engine.
Staroselsky Naum (Des Moines IA) Mirsky Saul (West Des Moines IA) Reinke Paul A. (Des Moines IA), Method and apparatus for preventing surge in a dynamic compressor.
Minta, Moses; Mittricker, Franklin F.; Rasmussen, Peter C.; Starcher, Loren K.; Rasmussen, Chad C.; Wilkins, James T.; Meidel, Jr., Richard W., Low emission power generation and hydrocarbon recovery systems and methods.
Oelkfe, Russell H.; Huntington, Richard A.; Mittricker, Franklin F., Low emission power generation systems and methods incorporating carbon dioxide separation.
Minto, Karl Dean; Denman, Todd Franklin; Mittricker, Franklin F.; Huntington, Richard Alan, Method and system for combustion control for gas turbine system with exhaust gas recirculation.
Mittricker, Franklin F.; Starcher, Loren K.; Rasmussen, Chad C.; Huntington, Richard A.; Hershkowitz, Frank, Methods and systems for controlling the products of combustion.
Mittricker, Franklin F.; Starcher, Loren K.; Rasmussen, Chad; Huntington, Richard A.; Hershkowitz, Frank, Methods and systems for controlling the products of combustion.
Mittricker, Franklin F.; Huntington, Richard A.; Starcher, Loren K.; Sites, Omar Angus, Methods of varying low emission turbine gas recycle circuits and systems and apparatus related thereto.
Wichmann, Lisa Anne; Simpson, Stanley Frank, Methods, systems and apparatus relating to combustion turbine power plants with exhaust gas recirculation.
Huntington, Richard A.; Denton, Robert D.; McMahon, Patrick D.; Bohra, Lalit K.; Dickson, Jasper L., Processing exhaust for use in enhanced oil recovery.
Gupta, Himanshu; Huntington, Richard; Minta, Moses K.; Mittricker, Franklin F.; Starcher, Loren K., Stoichiometric combustion of enriched air with exhaust gas recirculation.
Denton, Robert D.; Gupta, Himanshu; Huntington, Richard; Minta, Moses; Mittricker, Franklin F.; Starcher, Loren K., Stoichiometric combustion with exhaust gas recirculation and direct contact cooler.
Stoia, Lucas John; DiCintio, Richard Martin; Melton, Patrick Benedict; Romig, Bryan Wesley; Slobodyanskiy, Ilya Aleksandrovich, System and method for a multi-wall turbine combustor.
Huntington, Richard A.; Minto, Karl Dean; Xu, Bin; Thatcher, Jonathan Carl; Vorel, Aaron Lavene, System and method for a stoichiometric exhaust gas recirculation gas turbine system.
Valeev, Almaz Kamilevich; Ginesin, Leonid Yul'evich; Shershnyov, Borys Borysovich; Sidko, Igor Petrovich; Meshkov, Sergey Anatolievich, System and method for a turbine combustor.
Slobodyanskiy, Ilya Aleksandrovich; Davis, Jr., Lewis Berkley; Minto, Karl Dean, System and method for barrier in passage of combustor of gas turbine engine with exhaust gas recirculation.
Minto, Karl Dean; Slobodyanskiy, Ilya Aleksandrovich; Davis, Jr., Lewis Berkley; Lipinski, John Joseph, System and method for controlling the combustion process in a gas turbine operating with exhaust gas recirculation.
Huntington, Richard A.; Dhanuka, Sulabh K.; Slobodyanskiy, Ilya Aleksandrovich, System and method for diffusion combustion in a stoichiometric exhaust gas recirculation gas turbine system.
Huntington, Richard A.; Dhanuka, Sulabh K.; Slobodyanskiy, Ilya Aleksandrovich, System and method for diffusion combustion with fuel-diluent mixing in a stoichiometric exhaust gas recirculation gas turbine system.
Huntington, Richard A.; Dhanuka, Sulabh K.; Slobodyanskiy, Ilya Aleksandrovich, System and method for diffusion combustion with oxidant-diluent mixing in a stoichiometric exhaust gas recirculation gas turbine system.
Subramaniyan, Moorthi; Hansen, Christian Michael; Huntington, Richard A.; Denman, Todd Franklin, System and method for exhausting combustion gases from gas turbine engines.
Huntington, Richard A.; Dhanuka, Sulabh K.; Slobodyanskiy, Ilya Aleksandrovich, System and method for load control with diffusion combustion in a stoichiometric exhaust gas recirculation gas turbine system.
Huntington, Richard A.; Mittricker, Franklin F.; Starcher, Loren K.; Dhanuka, Sulabh K.; O'Dea, Dennis M.; Draper, Samuel D.; Hansen, Christian M.; Denman, Todd; West, James A., System and method for oxidant compression in a stoichiometric exhaust gas recirculation gas turbine system.
Biyani, Pramod K.; Leyers, Scott Walter; Miranda, Carlos Miguel, System and method for protecting components in a gas turbine engine with exhaust gas recirculation.
Biyani, Pramod K.; Saha, Rajarshi; Dasoji, Anil Kumar; Huntington, Richard A.; Mittricker, Franklin F., System and method for protecting components in a gas turbine engine with exhaust gas recirculation.
O'Dea, Dennis M.; Minto, Karl Dean; Huntington, Richard A.; Dhanuka, Sulabh K.; Mittricker, Franklin F., System and method of control for a gas turbine engine.
Oelfke, Russell H.; Huntington, Richard A.; Dhanuka, Sulabh K.; O'Dea, Dennis M.; Denton, Robert D.; Sites, O. Angus; Mittricker, Franklin F., Systems and methods for carbon dioxide capture in low emission combined turbine systems.
Thatcher, Jonathan Carl; West, James A.; Vorel, Aaron Lavene, Systems and methods for controlling exhaust gas flow in exhaust gas recirculation gas turbine systems.
Mittricker, Franklin F.; Huntington, Richard A.; Dhanuka, Sulabh K.; Sites, Omar Angus, Systems and methods for controlling stoichiometric combustion in low emission turbine systems.
Borchert, Bradford David; Trout, Jesse Edwin; Simmons, Scott Robert; Valeev, Almaz; Slobodyanskiy, Ilya Aleksandrovich; Sidko, Igor Petrovich; Ginesin, Leonid Yul'evich, Systems and methods for high volumetric oxidant flow in gas turbine engine with exhaust gas recirculation.
Vorel, Aaron Lavene; Thatcher, Jonathan Carl, Systems and methods of estimating a combustion equivalence ratio in a gas turbine with exhaust gas recirculation.
Thatcher, Jonathan Carl; Slobodyanskiy, Ilya Aleksandrovich; Vorel, Aaron Lavene, Systems and methods to respond to grid overfrequency events for a stoichiometric exhaust recirculation gas turbine.
Allen, Jonathan Kay; Borchert, Bradford David; Trout, Jesse Edwin; Slobodyanskiy, Ilya Aleksandrovich; Valeev, Almaz; Sidko, Igor Petrovich; Subbota, Andrey Pavlovich, Turbine system with exhaust gas recirculation, separation and extraction.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.