General Electric Company

Joel Donnell Holt

Diego Fernando Rancruel

Ashok Dattatraya Acharya

William Barrett Julian

Michael Joseph Alexander

Tailai Hu

Leslie Yung-Min Tong

Robert John Gdaniec

David John Fischer

Frederick William Block

Gordon Raymond Smith

Kelvin Rafael Estrada

Richard Lee Nichols

Erhan Karaca

Kevin Jon O'Dell

Richard John Rucigay

John Anthony Conchieri

Gerardo F Varillas

Christopher John Morawski

Andrew John Groth

William Barret Julian

In one embodiment, a system is provided. The system includes a combustor configured to combust a fuel, and a three-way valve fluidly coupled the combustor and disposed upstream of the combustor. The system also includes a fuel circuit comprising a fuel supply, wherein the fuel circuit is disposed upstream of the three-way valve and is configured to provide the fuel to the three-way valve. The system additionally includes a fuel conduit section fluidly coupling the fuel circuit to the combustor. The system further includes an inert fluid supply configured to provide an inert fluid to the three-way valve and a compressor discharge (CPD) fluid source configured to provide a purge fluid to the three-way valve. The three-way valve is configured to purge the fuel from a first portion of the fuel conduit section by using the purge fluid.

Turbine conduit purge systems

Certain embodiments of the invention may include systems, methods, and apparatus for determining online stress and life consumption of a heat recovery steam generator (HRSG). According to an example embodiment of the invention, a method for assessing components of a HRSG is provided. The method includes receiving HRSG design parameters; determining thermal stress data associated with the one or more HRSG components based at least in part on one or more historical, real-time, or calculated temperature sensor data associated with the one or more HRSG components; and determining cycle-related life consumption data associated with the one or more HRSG components based at least in part on the HRSG design parameters and the determined thermal stress data.

Systems, methods, and apparatus for determining online stress and life consumption of a heat recovery steam generator

Certain embodiments of the invention may include systems, methods, and apparatus for determining online stress and life of a heat recovery steam generator. According to an example embodiment of the invention, a method for assessing components of a heat recovery steam generator (HRSG) is provided. The method includes receiving HRSG design parameters; monitoring thermal stress data from one or more temperature sensors in communication with one or more HRSG components; and determining cycle-related life consumption data associated with the one or more HRSG components based at least in part on the HRSG design parameters and the monitored thermal stress data.

The embodiments described herein include a system and a method. In a first embodiment, a system includes a controller configured to control power plant operations. The system further includes a heat recovery steam generator (HRSG) monitor communicatively coupled to the controller and configured to receive inputs corresponding to the power plant operations. The system additionally includes an HRSG life prediction model configured to predict an operating life for an HRSG component. The HRSG monitor uses the HRSG life prediction model and the inputs to communicate a control action to the controller.

Systems and methods for heat recovery steam generation optimization

A combined cycle power plant includes a gas turbomachine, a steam turbomachine operatively coupled to the gas turbomachine, and a heat recovery steam generator operatively coupled to the gas turbomachine and the steam turbomachine. The heat recovery steam generator includes a high pressure reheat section provided with at least one high pressure superheater and at least one reheater. The combined cycle power plant further includes a controller operatively connected to the gas turbomachine, the steam turbomachine and the heat recovery steam generator. The controller is selectively activated to initiate a flow of steam through the heat recovery steam generator following shutdown of the gas turbomachine to lower a temperature of at least one of the high pressure superheater and the at least one reheater and reduce development of condensate quench effects during HRSG purge of a combined cycle power plant shutdown.

Combined cycle power plant including a heat recovery steam generator

Embodiments of the present disclosure include systems and a method. In one embodiment, a system is provided. The system includes a risk calculation system configured to calculate a risk based on a static input and a dynamic input, and a decision support system configured to use the risk to derive a decision. The system also includes a plant control system configured to update operations of a plant based on the decision, wherein the decision predicts future plant conditions.

System and method for optimizing plant operations

Systems and methods for performing islanding operations are usable to monitor and collect plant loads and turbine loads of a power plant. Such monitoring and collecting can be used to preemptively determine islanding configurations. According to one embodiment of the invention, a system can be provided. The system can be operable to receive power generation unit information, receive power plant information of the power plant, determine an islanding configuration for the power plant, transmit the islanding configuration to the at least one power generation unit of the power plant, receive breaker status information of at least one breaker coupled to the at least one power generation unit of the power plant and for all breakers connecting power plant to an external grid, and control at least one power generation unit of the power plant.

Systems and methods for performing islanding operations

A combined cycle power plant is provided and includes a gas turbine engine to generate power from combustion of a fuel and air mixture, a heat recovery steam generator (HRSG) disposed downstream from the gas turbine engine to receive heat energy from the gas turbine engine from which steam is produced, the HRSG including a superheating element and a drum element, and a steam turbine engine to be receptive of the steam produced in the HRSG and to generate power from the received steam, the HRSG further including a valve operably disposed to isolate the superheating element from the drum element when a risk of condensate formation in the HRSG exists.

Combined cycle power plant

In one embodiment, the invention provides a lubrication system for a machine comprising: a direct current (DC) motor; a battery system for powering the DC motor; a lubricating system in communication with the DC motor, the lubricating system including a supply of lubricating oil and a pump for delivering the lubricating oil to at least one component of the machine requiring lubrication; a hydraulic motor operably coupled to a shaft of the DC motor; a supply of a pressurized fluid in communication with the hydraulic motor; and a control device for discharging the supply of pressurized fluid into the hydraulic motor to power the hydraulic motor, whereby the hydraulic motor, when powered by the supply of pressurized fluid, is operable to turn the shaft of the DC motor, thereby reducing an operating current supplied to the DC motor by the battery system.

Hydraulic-assisted lubrication system and method

A combined cycle power plant startup system is provided. The system includes a steam turbine, a HRSG, a condenser, and a bypass system. The steam turbine may include a turbine section. The HRSG may be operably connected to the steam turbine for providing steam to the steam turbine. The HRSG may include a reheater. The bypass system may be configured to adjust the steam pressure downstream of the reheater by routing steam downstream of the reheater to the condenser. The bypass system may include at least one bypass line, at least one control valve operably connected to the at least one bypass line, a pressure gauge configured to monitor the steam pressure downstream of the reheater, and a controller configured to communicate with the pressure gauge and operate the at least one control valve.

Method and apparatus for combined cycle power plant startup

A method for assembling a fuel supply system for use with a power generation system. The method includes coupling a fuel heater to a fuel source for heating a fuel. A first heating assembly is coupled to the fuel heater for heating a first flow of water channeled to the fuel heater. A heat recovery steam generator assembly  is coupled to the fuel heater for channeling a second flow of heated water to the fuel heater. A valve assembly is coupled between the first heating assembly, the heat recovery steam generator assembly, and the fuel heater to enable a flow of heated water from the first heating assembly and the heat recovery steam generator assembly to be selectively channeled to the fuel heater.

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Scotia, NY, United States of America

Joel Donnell Holt