Abstract: Embodiments of the present invention employ a closed loop controls philosophy, which actively controls the starting means of a powerplant machine, throughout the start-up process. Here, the present invention may provide a method for adjusting a nominal operating schedule of the starting means, which may have the form of a Load Commutated Inverter (LCI). Embodiments of the method may adjust the nominal operating schedule based, in part, on an operating parameter, which is associated with the gas turbine 100. The operating parameter may include, but is not limited to: a rotor speed, a desired start-up time, or the like. Here, the control system may receive data on the operating parameter associated with the gas turbine.

Abstract: An embodiment of the present invention may incorporate a physics based approach (hereinafter “model”) to determine the level of the liquid. The model may incorporate the physical properties of the fluids within the container, and measurements of the fluid under consideration. The model may also incorporate data from measuring devices, such as, but not limiting of, a delta-pressure (DP) transmitter. The model may then calculate, within a reasonable level of accuracy, the level of the fluid within the container.

Abstract: A method and controller for identifying lean blowout conditions in a Dry Low NOx (DLN) combustor during a premix mode. An effective approach to quickly and reliably identify a blowout during operation in the premix mode is by the effect on fuel normalized power (FNP). FNP is a useful signal, in that a power reduction from a blowout may be distinguished much slower changes in power resulting from global fuel demand (changing load request). A difference between the FNP and a filtered FNP parameter may be compared against a predetermined threshold. If the difference exceeds the threshold, a lean blowout is identified and a signal may be transmitted to the turbine controller to reposition combustor operation away from blowout conditions.

Abstract: Embodiments of the present invention employ a closed loop controls philosophy, which actively controls the starting means of a powerplant machine, throughout the start-up process. Here, the present invention may provide a method for adjusting a nominal operating schedule of the starting means, which may have the form of a Load Commutated Inverter (LCI). Embodiments of the method may adjust the nominal operating schedule based, in part, on an operating parameter, which is associated with the gas turbine 100. The operating parameter may include, but is not limited to: a rotor speed, a desired start-up time, or the like. Here, the control system may receive data on the operating parameter associated with the gas turbine.

Abstract: A method is provided for performing a transfer from gas fuel operation to liquid fuel operation in a gas turbine with a dual fuel system. The method includes initiating a predetermined uncontrolled liquid fuel prefill flow rate through the liquid fuel system, sensing an onset of the uncontrolled liquid fuel flow to the combustor nozzles, and initiating transfer from gas fuel operation to liquid fuel operation when the flow of uncontrolled liquid fuel at the combustor nozzles is sensed. The onset of uncontrolled liquid fuel flow to the combustor nozzles is determined by monitoring changes of Fuel Normalized Power (FNP), a parameter sensitive to uncontrolled liquid fuel flow, and determining when FNP exceeds a threshold algorithm value.

Abstract: An embodiment of the present invention may incorporate a physics based approach (hereinafter “model”) to determine the level of the liquid. The model may incorporate the physical properties of the fluids within the container, and measurements of the fluid under consideration. The model may also incorporate data from measuring devices, such as, but not limiting of, a delta-pressure (DP) transmitter. The model may then calculate, within a reasonable level of accuracy, the level of the fluid within the container.

Abstract: A method and controller for identifying lean blowout conditions in a Dry Low NOx (DLN) combustor during a premix mode. An effective approach to quickly and reliably identify a blowout during operation in the premix mode is by the effect on fuel normalized power (FNP). FNP is a useful signal, in that a power reduction from a blowout may be distinguished much slower changes in power resulting from global fuel demand (changing load request). A difference between the FNP and a filtered FNP parameter may be compared against a predetermined threshold. If the difference exceeds the threshold, a lean blowout is identified and a signal may be transmitted to the turbine controller to reposition combustor operation away from blowout conditions.

Abstract: A method is provided for performing a transfer from gas fuel operation to liquid fuel operation in a gas turbine with a dual fuel system. The method includes initiating a predetermined uncontrolled liquid fuel prefill flow rate through the liquid fuel system, sensing an onset of the uncontrolled liquid fuel flow to the combustor nozzles, and initiating transfer from gas fuel operation to liquid fuel operation when the flow of uncontrolled liquid fuel at the combustor nozzles is sensed. The onset of uncontrolled liquid fuel flow to the combustor nozzles is determined by monitoring changes of Fuel Normalized Power (FNP), a parameter sensitive to uncontrolled liquid fuel flow, and determining when FNP exceeds a threshold algorithm value.