Abstract: The present disclosure relates to cable guiding assemblies for wind turbine power cables. A cable guiding assembly comprises an outer part and a central part. Each part has a top surface, a bottom surface, a laterally inner surface and a laterally outer surface. The laterally inner surface has a plurality of recesses suitable for receiving power cables. An outer portion of the central part is configured to be attached to an inner portion of the outer part.

Abstract: A system capable of appropriately cooling a generator and a power cable connected to the generator, disposed in a hot section of a turbo-fan engine, regardless of a rating of the engine is provided. The system includes: a junction box; a bypass air duct that supplies, to the junction box, air extracted from a portion of a bypass flow path of the engine on a side further downstream than a fan outlet; a core air duct that supplies, to the junction box, air extracted from a portion of a core flow path of the engine on a side further upstream than a compressor outlet; and a cooling air duct that extends from the junction box to a space for accommodating the generator, and valves capable of being independently controlled to open and close are provided at downstream ends of the bypass air duct and the core air duct.

Abstract: Disclosed are improved devices, systems and methods for powered generator systems which incorporate a solid-state transient power response system to provide supplemental electrical power to the power output during a transient period of increased electrical load, which permits the generator system sufficient time to progressively “spin up” the generator and/or otherwise increase power output at a desired rate to meet the increased electrical load demand in a desired manner.

Abstract: An exemplary two-step method for power system inertia online estimation is described. The first step is to accurately estimate the POI-level aggregated inertia. The second step is to calculate the system-level inertia constant by weighting all the POI-level aggregated inertia and to monitor the inertia spatial distribution. In one example embodiment, the PMU is installed at POI, the frequency spatial difference is considered, and the mechanical power is carefully treated.

Abstract: A system in a water body uses buoyant force of gaseous Hydrogen and Oxygen to generate electrical power with one or more turbines that includes power resulting from the buoyant force while transporting the Hydrogen or Oxygen to a higher elevation, without loss of electrons, for conversion to electricity at the higher elevation. Conversion of Hydrogen and Oxygen to water through a Hydrogen Fuel Cell or by burning at the higher elevation may generate additional steam power, hydropower, or purified water. Portable submersible modules may transport the system below or above the water to and from the base of a plumbing portion of the system. The amount of gaseous fuel energy available at the higher elevation is not detrimentally impacted by the generation of electricity by the turbine.

Abstract: A zero-fossil-fuel-using non-polluting apparatus to (1) use wind power to (2) generate a steady flow of hydroelectricity (3) from increasing the height level of water from a water table or river or lake and (4) storing that water and its potential energy in (5) a water tower, and then (6) releasing that water's potential energy in a (7) steady gravity-driven flow in a downward-flowing pipeline to (8) operate in-pipe electricity generators to establish a reliable non-fluctuating source of hydroelectricity from (9) many in-pipe hydroelectricity generators in pipelines to create electricity when the water tower water is released to the in-pipe hydroelectricity generators which creates (10) a steady non-fluctuating stream of water to turn the turbines of many in-pipe hydroelectric generators to create (11) a steady, non-fluctuating flow of electricity regardless of whether the wind is blowing or the sun is shining.

Abstract: There is provided a method (100) of installing a pitch tube (27) into an electrical power generator (24) for a wind turbine, the method comprising: installing (105a) the pitch tube (27) so that it is coaxial with a rotational axis (R) of the generator (24); supporting (105b) a bearing arrangement (50) associated with the pitch tube (27) at an end of the generator (24) using one or more primary supports (52), wherein each of the primary supports (52) comprises a first end (58) connected to the bearing arrangement (50) and a second end (60) connected to a component (32) associated with a rotating reference frame of the generator (24); and supporting (110) the bearing arrangement (50) using one or more secondary supports (54), wherein each of the secondary supports (54) comprises a first end (62) connected to the bearing arrangement (50) and a second end (64) connected to a component (42) associated with a stationary reference frame of the generator (24).

Abstract: A method for operating a power system connected to a power grid includes providing an active filter in the converter power path. Further, the method includes determining a change in attenuation of harmonics of the power system over a predetermined frequency spectrum that is needed to comply with one or more grid code requirements of the power grid. Thus, the method includes actively controlling, via a controller, the active filter to provide the change to the attenuation of the harmonics of the power system so as to mitigate the harmonics of the power system.

Abstract: The invention relates to a method for operating a power system of a wind turbine. The power system comprises first and second parallel connected DC-to-AC converters and at least one transformer, where each transformer comprises a primary section connected to a power line, and where the at least one transformer comprises first and second secondary sections connected to outputs of the respective first and second DC-to-AC converters. The method comprises providing a reactive correction reference, changing first and second reactive powers generated by the respective first and second DC-to-AC converters according to the reactive correction reference, so that one of the first and second reactive powers is increased while the other is decreased with amounts corresponding to the reactive correction reference so that the first and second reactive powers are unequal.

Abstract: A gas turbine engine includes a compressor section and a turbine section together defining a core air flowpath. Additionally, a rotary component is rotatable with at least a portion of the compressor section and at least a portion of the turbine section. An electric machine is mounted coaxially with the rotary component and positioned at least partially inward of the core air flowpath along a radial direction of the gas turbine engine. A cavity wall defines at least in part a buffer cavity surrounding at least a portion of the electric machine to thermally insulate the electric machine, e.g., from the relatively high temperatures within the core air flowpath.

Abstract: Provided is an arrangement for removing and/or exchanging a hydraulic fluid accumulator installed within a hub of a wind turbine, the arrangement including: a first pair of mounting legs each having at an upper portion connector for connecting to a hub component; a second pair of mounting legs each having at an upper portion connector for connecting to a hub component; a first bar connecting the first pair of mounting legs at a lower portion; a second bar connecting the second pair of mounting legs at a lower portion; an elongate resting structure for carrying an accumulator, the resting structure being at one end slidably supported by the first bar and at another end slidably supported by the second bar and being movable in a parallel manner traverse, in particular perpendicular, to a longitudinal direction the resting structure.

Abstract: A system includes a generator control unit (GCU). The GCU includes a first rectifier and a second rectifier. Each of the first rectifier and the second rectifier has a separate input to receive AC power from a separate respective permanent magnet generator (PMG). A method includes supplying AC power from a first PMG of a variable frequency generator (VFG) to a first rectifier of a generator control unit GCU that is operatively connected to control the VFG. The method includes supplying AC power from a second PMG to a second rectifier of the GCU. The first PMG supplies a lower AC voltage to the first rectifier than the second PMG supplies to the second rectifier.

Abstract: A generator module includes a housing arranged for mounting to a rear face of an internal combustion engine, a generator stator fixed in the housing, a generator rotor arranged radially inside of the generator stator, and a bearing arranged to support a radial inside of the generator rotor on the housing. The generator rotor may include a rotor carrier and a plurality of stacked plates secured to the rotor carrier. The bearing may be at least partially radially aligned with the plurality of stacked plates.

Abstract: An exciter drive circuit comprises a direct current (DC) link to provide a positive DC voltage to a positive voltage exciter rail and a negative DC voltage to a negative voltage exciter rail. An exciter winding includes a first exciter terminal connected to the positive voltage exciter rail and an opposing second exciter terminal connected to the negative voltage exciter rail. A flyback circuit establishes a first flyback current path that conducts the current from exciter winding in response to an inductive flyback event. A flyback fault protection circuit establishes a second flyback current path that conducts the current from exciter winding in response to the inductive flyback event and a fault present in the flyback circuit. The second flyback current path delivers the current output by the exciter winding from the negative voltage exciter rail to the positive voltage exciter rail.

Abstract: A method for mitigating voltage disturbances at a point of interconnection (POI) of a grid-forming inverter-based resource (IBR) due to flicker includes receiving a voltage reference command and a voltage feedback. The voltage feedback contains information indicative of the voltage disturbances at the POI due to the flicker. The method also includes determining a power reference signal for the IBR based on the voltage reference command and the voltage feedback. Moreover, the method includes generating a current vector reference signal based on the power reference signal, the current vector reference signal containing a frequency component of the voltage disturbances. Further, the method includes generating a transfer function of a regulator based on the frequency component to account for the flicker effect. In addition, the method includes generating a current vector based on a comparison of the current vector reference signal and a current vector feedback signal.

Abstract: The present disclosure relates to a field of door/window hardware accessories, in particular to a door/window pulley, a pulley device, and a door/window. The present disclosure provides the bearing and the anti-deformation metal ring that can be in contact with the track, the anti-deformation metal ring use rigidity itself to effectively avoid generating indentation, and the door/window pulley is also difficult to be pressed to cause deformation. Moreover, the inner part of the injection molded body is filled between the bearing and the anti-deformation metal ring, which not only well transfers pressure bore by the anti-deformation metal ring when load-bearing to the bearing, but also restores the anti-deformation metal ring after slight deformation by giving an outward elastic support to the anti-deformation metal ring using elasticity of the injection molded body.

Abstract: A method of mitigating high frequency harmonics in an output current of an electrical power system connected to a power grid includes providing an active harmonic filter in a stator power path connecting a stator of the generator to the power grid. Further, the method includes controlling, via a controller, the active harmonic filter to selectively extract a high frequency harmonic component from the output current. The method also includes determining, via the controller, whether the high frequency harmonic component is a positive sequence harmonic or a negative sequence harmonic. Moreover, the method includes compensating, via the controller, for the high frequency harmonic component based on whether the high frequency harmonic component is the positive sequence harmonic or the negative sequence harmonic to mitigate the high frequency harmonics in the output current.

Abstract: Embodiments of the present disclosure include a retrofit auxiliary nacelle yaw position control system that enables advanced nacelle yaw position control of a wind turbine by comparing a desired nacelle yaw position signal with the actual nacelle yaw position and generating a virtual relative wind direction signal that is provided to the existing turbine control unit. This method and system enable implementation of wake steering, collective yaw optimization and dynamic yaw optimization of a collection of wind turbines referred to as a wind plant. Modification of the existing turbine control unit is not required, greatly simplifying the implementation process of advanced yaw control strategies on existing wind plants.

Abstract: A method for controlling an inverter-based resource (IBR) having a power converter and a generator connected to an electrical grid includes determining an available active power of the electrical grid. The method also includes determining an available active power of the IBR based on an effect of a speed and a rating of the generator. Further, the method includes determining a minimum available active power based on the available active power of the electrical grid and the available active power of the IBR. Moreover, the method includes determining an active power limit change for the IBR based on one or more thermal margins of the IBR. In addition, the method includes determining an active power estimation as a function of the minimum available active power and the active power limit change. The method further includes providing the active power estimation to a supervisory controller for controlling the IBR.

Abstract: A rotary detonation rocket engine generator system can include an axial drive shaft operably coupleable to an electrical generator. At least one support arm is radially coupled to the axial drive shaft and has corresponding rotary detonation rocket engines. An air-fuel mixing chamber receives ambient air and fuel to form an air-fuel mixture and deliver the air-fuel mixture to an annular combustion chamber. At least one pulse detonation combustion chamber is in fluid communication with the annular combustion chamber to receive an oxidizer and fuel to form an oxidizer-fuel mixture. The at least one pulse detonation combustion chamber creates a detonation wave that travels along the at least one pulse detonation chamber to the annular combustion chamber and ignites the air-fuel mixture as the detonation wave travels around the annular combustion chamber to generate thrust force that causes rotation of the axial drive shaft to drive the electrical generator.