摘要:
A method (400) for increasing the operational flexibility of a turbomachine during a shutdown phase is provided. The turbomachine may include a first section, a second section, and a rotor disposed within the first section and the second section. The method (400) may determine an allowable range of a physical parameter associated with the first section (440) and/or the second section (460). The method (400) may modulate a first valve (450) and/or a second valve (470) to allow steam flow into the first section and the second section respectively, wherein the modulation is based on the allowable range of the physical parameter. In addition, the physical parameter allows the method to independently apportion steam flow between the first section and the second section of the turbomachine, during the shutdown phase.
摘要:
Systems 10 and methods for loading a steam turbine 14 are provided. A method may include: receiving a turbine loading factor; receiving a current steam turbine exhaust temperature; determining a steam flow ramping rate parameter 205 and a steam temperature ramping rate parameter 210 based at least in part on the turbine loading factor and the current steam turbine exhaust temperature, wherein the steam flow ramping rate parameter and the steam temperature ramping rate parameter are determined based at least in part on an inverse relationship between the steam flow ramping rate parameter and the steam temperature ramping rate parameter. The method may further include controlling at least one of: (a) steam flow to the steam turbine based at least in part on the steam flow ramping rate parameter; or (b) steam temperature to the steam turbine 14 based at least in part on the steam temperature ramping rate parameter 210.
摘要:
A method (400) for increasing the operational flexibility of a turbomachine is provided. The turbomachine may include a first section, a second section, and a rotor disposed within the first section and the second section. The method (400) may determine an allowable range of a physical parameter associated with the first section (440) and/or the second section (460). The method (400) may modulate a first valve (450) and/or a second valve (470) to allow steam flow into the first section and the second section respectively, wherein the modulation is based on the allowable range of the physical parameter. In addition, the physical parameter allows the method (400) to independently apportion steam flow between the first section and the second section of the turbomachine, during the loading process.
摘要:
A method (400) for increasing the operational flexibility of a turbomachine during a startup phase is provided. The turbomachine may include a first section, a second section, and a rotor disposed within the first section and the second section. The method (400) may determine an allowable range of a physical parameter associated with the first section (440) and/or the second section (460). The method (400) may modulate a first valve (450) and/or a second valve (470) to allow steam flow into the first section and the second section respectively, wherein the modulation is based on the allowable range of the physical parameter. In addition, the physical parameter allows the method (400) to independently apportion steam flow between the first section and the second section of the turbomachine, during the startup phase.
摘要:
A method (400) for increasing the operational flexibility of a turbomachine is provided. The turbomachine may include a first section, a second section, and a rotor disposed within the first section and the second section. The method (400) may determine an allowable range of a physical parameter associated with the first section (440) and/or the second section (460). The method (400) may modulate a first valve (450) and/or a second valve (470) to allow steam flow into the first section and the second section respectively, wherein the modulation is based on the allowable range of the physical parameter. In addition, the physical parameter allows the method (400) to independently apportion steam flow between the first section and the second section of the turbomachine, during the loading process.
摘要:
A method and a system (100) for limiting steam flow entering a steam turbine (102) are provided. The method and system (100) may intentionally unbalance the steam flow apportioned between sections (110,112) of the steam turbine (102). The steam turbine (102) comprises at least: a first section (112), a second section (114), and a rotor (115) disposed within each section. The method may receive a speed/load command, or the like, which provides reference strokes for a first valve (116), associated with the first section (110); and a second valve (118), associated with the second section (112). The method may also determine an operational parameter that may limit the reference strokes relative to the speed/load command. The operational parameter may determine the allowable steam flow for each section of steam turbine (102), independent of the speed/load command.
摘要:
A method (400) for increasing the operational flexibility of a turbomachine during a startup phase is provided. The turbomachine may include a first section, a second section, and a rotor disposed within the first section and the second section. The method (400) may determine an allowable range of a physical parameter associated with the first section (440) and/or the second section (460). The method (400) may modulate a first valve (450) and/or a second valve (470) to allow steam flow into the first section and the second section respectively, wherein the modulation is based on the allowable range of the physical parameter. In addition, the physical parameter allows the method (400) to independently apportion steam flow between the first section and the second section of the turbomachine, during the startup phase.
摘要:
A method and a system (100) for limiting steam flow entering a steam turbine (102) are provided. The method and system (100) may intentionally unbalance the steam flow apportioned between sections (110,112) of the steam turbine (102). The steam turbine (102) comprises at least: a first section (112), a second section (114), and a rotor (115) disposed within each section. The method may receive a speed/load command, or the like, which provides reference strokes for a first valve (116), associated with the first section (110); and a second valve (118), associated with the second section (112). The method may also determine an operational parameter that may limit the reference strokes relative to the speed/load command. The operational parameter may determine the allowable steam flow for each section of steam turbine (102), independent of the speed/load command.