GE Vernova Technology Patente

A system for monitoring for a combustor anomaly in a gas turbine system (GT, 100) is provided. The system includes an emissions probe (180) for each combustor element (116) in the GT system and emissions analyzer(s) (190) operatively coupled to the emissions probes to periodically measure an emissions level of the exhaust flow from each emissions probe. A combustor anomaly detection system is connected to the emissions analyzer(s) and determines whether the emissions level at a select emissions probe of the emissions probes deviates from an expected emissions level by more than a predetermined threshold. Where the emissions level so deviates, the system identifies that a combustor element anomaly exists for the combustor element from which the exhaust flow originates and adjusts operation of the combustor element having the combustor element anomaly. The system provides accurate identification of combustor anomalies without the use of a large number of temperature and/or pressure sensors.

Methods and systems are provided for servicing a turbomachine having a rotor with a plurality of hook elements for receiving a retention device. Current data indicating each current hook element having a dowel pin hole and a respective current number of stakes, a defined spacing rule, and a maximum number of stakes per dowel pin hole are received. For each current hook element, first potential combinations with other hook elements are determined based on the defined spacing rule, and the current number of stakes. First solution combinations are identified from the first potential combinations, the current number of stakes at each of the hook elements in each of the first solution combinations being less than the maximum number of stakes. A user interface is controlled to indicate at least one desired solution of the first solution combinations having a highest number of potential future services.

There is provided a method, and a controller, for controlling a plurality of submodules (212) in a valve (224) of a power converter (120), the method comprising: determining, by a controller (160), a first switching time for a first submodule of the plurality of submodules (212); determining, by the controller (160), a second switching time for a second submodule of the plurality of submodules (212), wherein the first switching time differs from the second switching time by a time difference; wherein the time difference is based on a property of resonance in the power converter (120), wherein the resonance in the power converter is that caused by switching at least one submodule of the plurality of submodules (212) in the valve (224); and providing, by the controller (160), one or more switching commands to the valve (224) to cause the first submodule to switch at the first switching time and the second submodule to switch at the second switching time.

There is provided a method (300), and a controller (160), for controlling a plurality of submodules (212) in a valve (224) of a power electronics device (290). The method comprises determining, by the controller (160), a time period in which selected submodules of the plurality of submodules (212) are to be switched in order to control an output voltage of the valve (224); determining, by the controller (160), for each of the selected submodules, a respective switching time, within the time period, based on a voltage demand for the time period and a voltage of each of the selected submodules, wherein at least one of the respective switching times is different to another of the respective switching times; generating, by the controller (160), a respective switching command (270) for each of the selected submodules; and providing, by the controller, the respective switching commands (270) to the valve (224), whereby to control the selected submodules to switch at the respective switching times within the time period.

Systems (100) and methods are provided for calibrating a hydraulic starter (50) for a turbomachine (10). A hydraulic fluid source (54) supplies fluid at a high pressure or at a low pressure for rotatably driving the hydraulic starter, and a valve (64) is movable to adjust a flow rate of the fluid supplied from the hydraulic fluid source to the hydraulic starter. The hydraulic fluid source and operation of the valve are automatically controlled by a computing system (102) to sequentially perform a plurality of base modes with the valve (64) being in either a fully closed position or a fully opened position. The plurality of base modes includes at least one standby mode test and at least one crank speed mode test. A rotational speed of the turbomachine detected by a speed sensor (66) during each of the plurality of base modes is monitored by the computing system for calibrating the hydraulic starter.

A system (150) for controlling ventilation to a turbine enclosure (92) includes an air inlet filter system (152), a ventilation fan (154) to extract an air flow (156) from the air inlet filter system (152), and an air delivery system (160) including a plurality of conduits (162). Each conduit (162) delivers the air flow (156) to one of a plurality of ventilation inlets (164) defined in the turbine enclosure (92). A motorized volume control damper (170) is operably coupled to each of the plurality of ventilation inlets (164) and is configured to control a volume of air flow (156) entering a respective ventilation inlet (164) through a respective conduit (162). A controller (180) is configured to control each motorized volume control damper (170) to evenly distribute the air flow (156) to each of the plurality of ventilation inlets (164) regardless of a pressure drop (ΔP) across the ventilation fan (154).

A method (300) for repairing a steel alloy article is provided. The method includes depositing (302), using a first welding process, a first weld repair layer across a surface of the steel alloy article to be repaired. The first weld repair layer forms a heat-affected zone (HAZ) in the steel alloy article beneath the surface. The method also includes tempering (304) the heat-affected zone by depositing (358), using a second welding process, a second weld repair layer across the first weld repair layer. The first welding technique is different than the second welding process and induces a lower heat input into the steel alloy article than the second welding process, wherein a thickness of the first weld repair layer is thinner than a thickness of the second weld repair layer.

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A vibration damping system (120) includes a vibration damping element (166) for a turbine nozzle (112) or blade (114). A body opening (160) extends through the turbine nozzle (112) or blade (114) between the tip end (132) and the base end (130) thereof, e.g., through the airfoil (134) among potentially other parts of the nozzle (112) or blade (114). A vibration damping element (166) includes a plurality of stacked plate members (170) within the body opening (160). Each plate member (170) is in surface contact with at least one adjacent plate member (170) to cause friction that dampens vibration of the nozzle (112) or blade (114). The body opening (160) has an inner dimension and each plate member (170) has an outer dimension sized to frictionally engage the inner dimension of the body opening (160) to damp vibration. Plate members (170) may each include a central opening (180) therein, and a fixed elongated body (186) may extend through the central opening (180).

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