Abstract: Methods, systems, and devices are disclosed for wind power generation. In one aspect, a wind power generator includes a support base; inductors positioned over the support base in a circular array; an annulus ring track fixed to the base support and providing a circular track around which the inductors are located; an annulus ring rotor placed on the annulus ring track and engaged to rollers in the circular track so that the annulus ring rotor can rotate relative to the an annulus ring track, in which the annulus ring rotor include separate magnets to move through the circular array of inductors to cause generation of electric currents; and a wind rotor assembly coupled to the annulus ring rotor and including wind-deflecting blades that rotate with the rotor and a hollow central interior for containing a wind vortex formed from deflecting wind by the blades to convert into the electric energy.

Abstract: A method for optimizing reactive power generation of an electrical power system includes generating, via a plurality of cluster-level controllers, a cluster-level reactive power command for each cluster of electrical power subsystems based on a system-level reactive power command. The method also includes determining, via the cluster-level controllers, a subsystem-level reactive power command for each of the electrical power subsystems based on the cluster-level reactive power command. Further, the method includes evaluating, via a plurality of subsystem-level controllers, reactive power capability of a plurality of reactive power sources within each of the electrical power subsystems. Moreover, the method includes generating, via each of the subsystem-level controllers, an actual reactive power for each of the electrical power subsystems based on the evaluation by allocating a portion of the subsystem-level reactive power command to each of the plurality of reactive power sources.

Abstract: A liquid cooling method for a hydroelectric generator which cools the winding of the rotor via a primary cooling liquid circuit, the cooling liquid being maintained in the circuit by the produced centrifugal force. The dissipation of the thermal energy takes place via a secondary cooling liquid which flows once vertically through the system. Accordingly, the thermal exchange takes place via a co-rotating heat exchanger in the center of the rotor. A device for carrying out such a method is also disclosed.

Abstract: A hydroelectric energy system includes a stator including a first plurality of electricity-generating elements. The system also includes a rotor including a second plurality of electricity-generating elements. The rotor is disposed radially outward of an outer circumferential surface of the stator and is configured to rotate around the stator about an axis of rotation. The rotor is a flexible belt structure having a variable thickness and extending along a portion of an axial length of the stator. The system further includes at least one hydrodynamic bearing mechanism configured to support the rotor relative to the stator during rotation of the rotor around the stator. The at least one hydrodynamic bearing mechanism includes a bearing surface made of wood or a composite material.

Abstract: A system exchanges pressure and heat from a source stream to a sink stream. The system includes a source exchanger and a sink exchanger. The source exchanger includes a first pressure exchanger and a first heat exchanger. The first pressure exchanger converts pressure of the source stream to electrical energy. The first heat exchanger converts temperature from the source stream via a first temperature differential to electrical energy. The sink exchanger includes a second pressure exchanger and a second heat exchanger. The second pressure exchanger uses electrical energy received from the source exchanger to change a pressure of the sink stream. The second heat exchanger uses electrical energy received from the source exchanger to change a temperature of the sink stream. Related apparatus, systems, techniques, and articles are also described.

Abstract: Systems and methods for operating an energy storage system in a doubly fed induction generator wind turbine system are provided. An energy storage system can include a transformer configured to transform AC power from a first voltage to AC power at a second voltage and a bi-directional AC to DC power converter coupled to the transformer. The bi-directional AC to DC power converter can be configured to convert the AC power at the second voltage to a DC power. The energy storage system can further include an energy storage device coupled to the bi-directional AC to DC power converter. The energy storage system can be configured to receive power generated by a rotor of the DFIG via an AC line bus. The energy storage device can be configured to store the power received by the energy storage system.

Abstract: A wind turbine control system includes a thrust sensor and a braking system, and allows an increase in wind rotor load to be detected instantaneously and corrective action to be initiated. The system includes additional features such as deceleration control. In one embodiment, a turbine controller regulates the rate of deceleration of the rotor shaft.

Abstract: An energy conversion device includes a container body configured to hold a liquid; a housing affixed above the container body by a handler connected to a surface of the container body, wherein a primary roller is configured to rotate at a first end of the housing and a free roller is configured to rotate at a second end of the housing; a piston attached at a first end to an outer perimeter of the primary roller; an inflatable balloon attached to a second end of the piston within the container body, wherein vertical movement of the piston causes the primary roller to rotate; an air chamber configured to supply air to a lower opening in the inflatable balloon via a balloon valve; and an interconnect located on a side of the free roller configured for connection to one of an energy-driven device or a turbine generator.

Abstract: This underwater device is twin-motor underwater floating-type power generation device that is provided with: a device main body that is equipped with a pair of pods that have a turbine, and with a connecting beam that connects these pods together in parallel with each other; a sinker; and tether cables that tether the device main body to the seabed via this sinker. The respective turbines of the pods are each provided with variable pitch turbine blades. This device is also provided with a depth meter that detects deviation in posture in the roll direction that is generated in the pair of pods, and a posture controller that controls the pitch of the variable pitch turbine blades of the respective turbines so as to nullify any deviation in posture in the roll direction that has been generated in the pair of pods and has been detected by the depth meter.

Abstract: The wind turbine array includes a plurality of wind turbines, a supporting frame, and a bollard. The plurality of wind turbines mount in the supporting frame. The bollard: 1) raises the supporting frame above a supporting surface; 2) transfers the load path of the supporting frame and the plurality of wind turbines to the supporting surface; and, 3) adjusts the azimuth of the supporting frame to optimize the orientation of the plurality of turbines relative to the direction of the wind. The plurality of wind turbines use the wind to generate electricity that is subsequently fed into an electric load.

Abstract: A solid or liquid fuel to plasma to electricity power source that provides at leas; one of electrical and thermal power comprising (i) at least one reaction cell for the catalysis of atomic hydrogen to form hydrinos, (ii) a chemical feel mixture comprising at least two components chosen from: a source of H2O catalyst or H2O catalyst; a source of atomic hydrogen or atomic hydrogen; reactants to form the source of H2O catalyst or H2O catalyst and a source of atomic hydrogen or atomic hydrogen; one or more reactants to initiate the catalysis of atomic hydrogen; and a material to cause the feel to be highly conductive, (iii) a fuel injection system such as a railgun shot injector, (iv) at least one set of electrodes that confine the fuel and an electrical power source that provides repetitive short bursts of low-voltage, high-current electrical energy to initiate rapid kinetics of the hydrino reaction and an energy gain due to forming hydrinos to torn! a brilliant-light emitting plasma, (v) a product recovery sys

Abstract: A kit for a wind station having a fixed speed wind turbine with a generator configured to be coupled to a grid by a coupling device so that the turbine operates at a fixed frequency equal to the frequency of the grid. The kit includes a back-to-back power converter configured for connection between the generator and the grid, and the power converter includes a machine side converter, a grid side converter and a DC link between both converters, a controller for controlling the power converter, and a connection point for receiving at least one parameter of the generator of the turbine. The connection point is communicated with the controller, and the controller is configured to act upon the power controller depending on said parameter.

Abstract: A combined cycle dual closed loop electric generating system, having a gas turbine assembly (having a combustion chamber, a compressor, a first pump, a first driveshaft, a gas turbine and a first generator) and a steam turbine assembly (having a second pump, a second driveshaft, a steam turbine and a second generator). The first portion of the working fluid circulates through the gas turbine assembly and a first heat exchanger. The second portion of the working fluid circulates through the steam turbine assembly and the first heat exchanger. The first heat exchanger transfers a first heat energy from the gas turbine loop to the steam turbine loop. The gas turbine assembly generates a first portion of an electric output. The steam turbine assembly generates a second portion of the electric output.

Abstract: A method for controlling temperature of a switching device of a power converter of an electrical power system includes monitoring, via one or more sensors, at least one operating condition of the electrical power system. Further, the method includes monitoring a temperature of the switching device. Moreover, the method includes controlling, via a control system communicatively coupled to the one or more sensors, torque of a generator of the electrical power system based on the at least one operating condition of the electrical power system so as maintain the temperature of the switching device below a predetermined threshold.

Abstract: According to one embodiment, there is provided a variable-speed operation control apparatus of a hydroelectric power generation system including a power generator interconnected to a power system through a main circuit and a water turbine directly connected to the power generator. The apparatus includes a branch circuit branched from the main circuit and including a frequency converter which performs conversion between an output frequency of the power generator and a system frequency of the power system, wherein the power generator is interconnected to the power system through the branch circuit when a flow rate of water is less than a fixed level.

Abstract: In a case where external electricity feed is being performed, a water temperature threshold Tref is set to a temperature T2 that is lower than in a case where the external electricity feed is not being performed, and canister puree is executed when an engine is in operation and a cooling water temperature Tw is the water temperature threshold Tref or higher. Thereby, it is possible to increase the opportunity to perform the canister purge, and to enhance evaporative emission performance. Furthermore, in the case where the external electricity feed is being performed, a maximum purge rate Pmax is set to a value P2 that is greater than in the case where the external electricity feed is not being performed. Thereby, it is possible to quickly complete the canister purge.

Abstract: A water power plant for the generation of electric current from includes a housing around which a flowing medium passes on an outer side, a stator of an electric generator and a rotor of the generator, which is rotatably mounted relative to the stator. The rotor includes a rotor ring with an annular surface and an arrangement of inwardly extending turbine blades, thereby defining a free-standing axis of rotation. The housing defines an inlet portion with a first front-side cutting edge which delimits a circular inlet opening, from which extends an inlet-side guide surface to the rotor, and an outlet portion with an outlet opening, between which a flow path passing the rotor ring can be formed. It is provided that the inlet opening has a free inlet cross-section which is maximally as large as a cross-sectional area delimited by the rotor ring.

Abstract: An energy harvester including a stand supporting the energy harvester in a fluid flow, i.e. a stream or current; at least one bluff body extending from the stand and positioned substantially perpendicular to the fluid flow, wherein each bluff body moves relative to the stand at least in a direction perpendicular to the fluid flow, wherein sufficient flow causes oscillating movement of the bluff body; and an electrical generator coupled to the stand and coupled to at least one bluff body converting the oscillating movement to electrical power, wherein the rate of electrical power generation per movement of the bluff body (or harvesting) is varied throughout a range of amplitudes of the oscillation of the bluff body and wherein the harvesting rate of at least one amplitude of the body oscillation is greater than the harvesting rate of at least one lower amplitude of the body oscillation.

Abstract: Assemblies systems, and methods are disclosed for generating energy from natural forces and, more particularly, to energy generation using tidal action. A tidal energy conversion assembly includes a displacement vessel housing a directional converter that is coupled to an electrical power generator. The tidal energy conversion assembly further includes an anchor cable having a first end, a second end connected to the directional converter, and a length in between the first end and the second end. The anchor cable may be threaded through an anchor at a stationary location, such as a sea floor. The rising, falling, and/or drag forces of the tide cause a change in the length of the anchor cable thus exerting a force on the directional converter. The directional converter converts this force into rotational energy that may be harnessed by the electrical power generator to generate electricity for consumption.

Abstract: The hydroelectric power generating system includes a reservoir for retaining a body of water and an outer vessel that surrounds a peripheral wall of the reservoir. A circumferential canal extends between an upper portion of the reservoir peripheral wall and the outer vessel. One or more penstocks extend below the canal between the reservoir and the outer vessel. Each penstock has one or more hydroelectric turbine generators installed therealong. A plurality of primary wind turbines can be disposed on a peripheral wall of the reservoir and a plurality of air columns can be disposed within the reservoir to generate auxiliary power.