Abstract: A topside platform for a voltage source converter high voltage direct current, VSC HVDC, symmetrical monopole converter station. The topside platform including a first floor and a second floor, an incoming AC switchgear module, and first and second transformer modules, wherein the incoming AC switchgear module is configured to distribute a first alternating current, AC, signal from an AC grid to the first and second transformer modules, wherein the first and second transformer modules are arranged on the first floor of the topside platform and are configured to transform the first AC signal into a second AC signal; and first and second converter modules configured to convert the second AC signal into a direct current, DC, signal for a DC circuit, wherein the first and second converter modules are positioned on the second floor of the topside platform, wherein the incoming AC switchgear module is positioned between the converter modules.

Abstract: The disclosure provides a system to heat a portion of a gas turbine (GT) engine of a power generation system in a standby mode. The system includes a first heated fluid manifold and a first conduit coupling a heated fluid supply external to the GT engine to one or more fatigue-prone components within the GT engine. A first plurality of valves is configured to control an amount of heated fluid flow through the first conduit between the heated fluid supply and the one or more fatigue-prone components. A controller is in communication with the first plurality of valves. The controller adjusts an open extent of at least one of the first plurality of valves to control a temperature of the one or more fatigue-prone components. The external heated fluid supply may be an auxiliary system or a second GT engine operating in non-standby mode.

Abstract: A system is provided for load testing a lift beam. The system includes a load testing framework configured to support the lift beam, a first connector configured to couple with a lift connector of the lift beam, and a second connector configured to couple with a load connector of the lift beam. The system also includes at least one drive configured to force the first and second connectors away from one another to load test the lift beam.

Abstract: A system and method for controlling current distribution to electrical brushes used in a dynamoelectric machine is disclosed. The approach includes using an arrangement of resistor devices electrically connected to the electrical brushes to control a distribution of a flow of the electrical current between an external source and the electrical brushes. The arrangement of the resistor devices is configured to control an amount of the flow of the electrical current that is distributed to individual brushes and/or one or more groups of brushes while the dynamoelectric machine is operating.

Abstract: A system and method for selective activation and deactivation of electrical brushes used in a dynamoelectric machine for current density optimization is disclosed. The approach includes using an arrangement of switches electrically connected to the electrical brushes to selectively activate and deactivate the brushes during the operation of the dynamoelectric machine. This entails opening and closing selective ones of the switches for a predetermined time period to adjust the average current density of the electrical current passing through the electrical brushes to be within a predetermined current density range while the dynamoelectric machine is operating.

Abstract: A method of blending at least two fuels includes providing at least two fuels to a cyclonic mixer via a fuel supply system, the fuel supply system including a fuel supply circuit for each fuel of the at least two fuels, mixing, via at least one vortex formed in the cyclonic mixer, the at least two fuels to form a fuel mixture, determining, via one or more sensors, a measured interchangeability index of the fuel mixture, comparing the measured interchangeability index to a predetermined interchangeability index, adjusting, via the fuel supply system, one or more parameters of at least one of the at least two fuels based on the comparison between the measured interchangeability index and the predetermined interchangeability index, and providing the fuel mixture to a combustion system.

Abstract: A system for detecting a fault type and faulted phase in a power grid includes a controller and a relay. The relay is configured to monitor a line of the power grid and generate a monitoring signal. The controller may be configured to determine, in response to the monitoring signal received from the relay, sequence voltages and sequence currents in the line. The controller may further determine, in response to the sequence voltages and sequence currents, an absence or a presence of a weak-infeed condition in the line. The controller may further determine, in response to the monitoring signal and the absence or the presence of the weak-infeed condition, a first plane sequence signature and a second plane sequence signature. The controller may further determine a fault type and faulted phase in the power grid in response to the first plane sequence signature and the second plane sequence signature.

Abstract: An airfoil includes a leading edge, a trailing edge, a pressure side wall, and a suction side wall. The pressure side wall and the suction side wall each extend between the leading edge and the trailing edge. A camber axis is defined halfway between the pressure side wall and the suction side wall. A cooling circuit is defined in the airfoil. The cooling circuit includes a trailing edge cooling circuit. The trailing edge cooling circuit has a pressure side channel that is disposed at least partially on a first side of the camber axis and a suction side channel that is disposed at least partially on a second side of the camber axis. The pressure side channel and the suction side channel each converge towards the trailing edge as the pressure side channel and the suction side channel extend towards the trailing edge.

Abstract: This application provides an inner compressor casing suspension device for lifting an inner compressor casing-inner diffuser casing assembly within an outer compressor casing. The inner compressor casing suspension device may include one more forward inner compressor casing suspension devices extending from the outer compressor casing to the inner compressor casing-inner diffuser casing assembly with each of the one or more forward inner compressor casing suspension devices including a C-clamp and a forward lifting device, and one or more aft inner compressor casing suspension devices extending from the outer compressor casing to the inner compressor casing-inner diffuser casing assembly with each of the one or more aft inner compressor casing suspension devices including an aft lifting device.

Abstract: A method for producing an additively manufactured, graded composite transition joint (AM-GCTJ) includes preparing a grating or lattice pattern from a first alloy A; the grating or lattice pattern includes pores in the grating or lattice patterns. The grating pattern is built from a first end to a second end being denser on the first end than on second end, and gradually reduces density by increasing the pore size and/or reducing density of the grating or lattice pattern; adding a second alloy B powder to the second end of grating or lattice pattern. The second alloy B powder is filled towards the first end. A composite is formed of first alloy A and second alloy B powder in the AM-GCTJ. The composite is subjected to hot isostatic pressing (HIP) to densify the composite. The second alloy B is graduated from the first end to the second end O of AM-GCTJ.

Abstract: A system includes a turbine having an exhaust flow path, an inner turbine wall radially disposed along the exhaust flow path, an outer turbine wall disposed along the exhaust flow path and radially outward from the inner turbine wall, and an outer flow control vane configured to selectively extend radially inward from the outer turbine wall. A radial extent of the outer flow control vane is less than a radial distance between the inner turbine wall and the outer turbine wall. The outer flow control vane is disposed downstream of a last stage vane of the turbine and upstream of a last stage blade of the turbine. The turbine also includes an actuation assembly configured to actuate the outer flow control vane to cause the outer flow control vane to extend radially inward. The system also includes a controller configured to instruct the actuation assembly to actuate the outer flow control vane.

Abstract: A fuel injection assembly for a combustor of a gas turbine engine includes a body with a head section that defines an air intake chamber. A mixing chamber is disposed below the air intake chamber. A deflection member is disposed in the air intake chamber and includes an upper deflection surface and sides spaced apart from inner wall surfaces of the air intake chamber such that peripheral air passages are defined for air to pass from the air intake chamber into the mixing chamber. A plurality of radially extending and longitudinally spaced-apart ribs is disposed along longitudinal side walls of the mixing chamber. A fuel plenum is disposed along the longitudinal side walls of the mixing chamber, and a plurality of fuel injection holes is defined from the fuel plenum through the longitudinal side walls of the mixing chamber and at least some of the ribs.

Abstract: A system and method are provided for manufacturing a tower structure. Accordingly, an interlocking form ring is additively manufactured with a first printhead assembly. The interlocking form ring defines a plurality of recesses in a radially inner or a radially outer face. A cementitious material is deposited within one or more of the recesses with a second printhead assembly. At least one reinforcing member is positioned within the recess with the second printhead assembly. The second printhead assembly is positioned adjacent to the cementitious material during the curing thereof so as to provide a slip form for the curing of the cementitious material.

Abstract: A method includes applying a material coating to a surface of a machine component, wherein the material coating is formed from a combination of a hardfacing material, aluminum-containing particles, and a braze material. The method also includes thermally treating the material coating at a temperature to generate an oxide layer comprising aluminum from the aluminum-containing particles, wherein the oxide layer is configured to reduce oxidation of the hardfacing material, and the braze material is configured to facilitate binding between the material coating and the surface of the machine component.

Abstract: A lift system and method for installation and removal of a combustion can from a turbomachine are provided. The lift system includes a rail, a portable cart assembly, and a slide assembly. The portable cart assembly includes a combustion can cradle assembly coupled to a telescopic member. The combustion can cradle assembly is configured to removably couple to a combustion can of the turbomachine. The slide assembly is removably couplable to the portable cart assembly and the rail. The slide assembly is movable with the portable cart assembly along the rail to adjust a position of the combustion can cradle assembly.

Abstract: A tooling assembly for installation relative to a first and second turbomachine component is provided. The tooling assembly includes an axial mounting portion removably couplable to the first turbomachine component. The axial mounting portion includes a first plate, a second plate spaced apart from the first plate, and at least one turnbuckle assembly that extends between, and is coupled to, the first plate and the second plate. At least one of the first plate and the second plate include a radial compression portion. The radial compression portion includes a compression bar radially movable relative to the axial mounting portion and configured to contact the second turbomachine component.

Abstract: Vibrational damping assemblies, turbomachine airfoils, and exhaust diffusers are provided. A vibrational damping assembly includes at least one pin coupled to the turbomachine component. The at least one pin has a pin body and a disk coupled to the pin body. The vibrational damping assembly further includes at least one plate disposed between the disk and the turbomachine component. The at least one plate is movable between the disk and the turbomachine component relative to the plurality of pins and relative to the turbomachine component to dampen vibrations experienced by the turbomachine component.

Abstract: A method of blending at least two fuels includes providing at least two fuels to a helical static mixer via a fuel supply system, the fuel supply system including a fuel supply circuit for each fuel of the at least two fuels, mixing, via a plurality of helical structures of the helical static mixer, the at least two fuels to form a fuel mixture, determining, via one or more sensors, a measured interchangeability index of the fuel mixture, comparing the measured interchangeability index to a predetermined interchangeability index, adjusting, via the fuel supply system, one or more parameters of at least one of the at least two fuels based on the comparison between the measured interchangeability index and the predetermined interchangeability index, and providing the fuel mixture to a combustion system.

Abstract: A combustor for a gas turbine system includes a combustion liner including a primary combustion zone and a secondary combustion zone. The combustor body is additively manufactured and made of a first material. The combustor also includes axial fuel stage (AFS) immersed injectors extending radially into the combustion liner in the secondary combustion zone. Each AFS immersed injector extends through an opening in the combustion liner and is additively manufactured with a second material different than the first material. A coupler fixes each AFS immersed injector in a respective opening in the combustion liner. The additive manufacturing results in as much as a 70% reduction in parts within a given combustor and allows use of high temperature and high oxidation tolerant, hot gas path (HGP) materials for the AFS immersed injectors.

Abstract: A modeling system for a plant system of a power plant is provided. The modeling system enables receiving a selection of one or more pre-engineered sub-modules for a plant system module, wherein each pre-engineered sub-module is configured to be scalable over a defined range both for an entire class product range and each potential power plant configuration, and each pre-engineered sub-module is parametrized within the defined range with a pre-defined parametric relationship. The modeling system enables receiving values for one or more variables for the defined range for the one or more pre-engineered sub-modules. The modeling system enables generating a pre-engineered and parametrized sub-module model for each of the one or more pre-engineered sub-modules based on the values for the variables and generating a plant system module model from the pre-engineered and parametrized sub-module models by assembling the pre-engineered and parametrized sub-module models together according to pre-defined rules.