Abstract: A sea wave power generation device includes: a motion bar, a platform, a platform-supporting upper upright post for supporting the platform, a platform-supporting lower upright post, a hydraulic lift post, a flywheel set for connecting power generation equipment, and a platform lift control device, wherein sea wave pushes floating ball to drive the motion bar to move upwards, a rack section of the motion bar drives a first flywheel on first side to rotate, which drives a generator to generate power through a spindle; wherein after the sea wave, the floating ball drives the motion bar to move downwards under action of gravity. The rack section of the motion bar drives a second flywheel on second side to rotate, which drives the generator to generate power through the spindle, in such a manner that continuous power generation is achieved.

Abstract: An output by a wind farm including multiple wind power generation devices is controlled by an output control device. To control the output, (1) a potential estimator estimates an outputtable maximum power amount by each wind power generation device, (2) a control amount determiner determines a control amount of the whole wind farm based on the maximum power amount estimated by the potential estimator, (3) a control timing adjuster adjusts a control timing of the control amount of the whole wind farm, (4) a control amount distributer distributes the control amount having undergone the control timing adjustment based on an available power generation amount of each wind power generation device.

Abstract: A wind energy installation having a wind rotor, a generator which is driven thereby and interacts with a converter in order to produce electrical power, rotation-speed regulation and converter control which interacts therewith, wherein the rotation-speed regulation outputs a nominal rotation speed signal (nref). Furthermore, additional regulation is provided, which has an input for an additional power and is designed to produce a rotation speed change signal therefrom, taking account of a rotator inertia moment, and to output this as an output signal, which is added to the nominal rotation speed signal via a logic element. Kinetic energy is taken from the wind rotor in a controlled manner by reducing the rotation speed and is converted by the generator to additional electrical energy. This allows primary regulation power to be made available deliberately by rotation speed variation, to be precise even in unsteady wind conditions.

Abstract: A method of operating a wind turbine is provided. The wind turbine comprises a turbine rotor with at least one blade having a variable pitch angle, a power generator, and a power converter connected to the power generator via a first circuit breaker and to a power grid via a second circuit breaker. According to the method, overvoltage events at the power grid are monitored. If an overvoltage event is detected, the method comprises opening the first circuit breaker and the second circuit breaker, disabling active operation of the power converter, connecting a power dissipating unit to the power generator to dissipate power output from the power generator, and moving the pitch angle of the at least one blade towards a feathered position.

Abstract: The present invention relates a wind turbine generator with an electrical generator, a dump load unit, for dissipating power, a wind turbine power controller and a damping controller both arranged to control wind turbine components based on a damping reference signal, the damping reference signal is a combined signal, and comprises a first reference signal and a second reference signal, the second reference signal is an oscillating part, the wind turbine power controller is controlling the power from the electrical generator according to the first reference signal and the damping controller is controlling the dump load unit to dissipate power according to the second reference signal. The invention also relates to a method for damping oscillations with wind turbine generators.

Abstract: Apparatus for generating and supplying electrical power to AC loads on an aircraft may include a prime mover, an exciter generator rotatably coupled to the prime mover and a main generator with a main generator rotor electrically coupled to the exciter generator to receive AC power from the exciter generator. One or more capacitors may be electrically coupled to the main generator rotor to increase a power factor of the main generator rotor.

Abstract: A high-altitude wind power generation system with a cycloidal turbine and a motor-generator, and a method of operating the same. The system includes a buoyant apparatus configured to be inflated when buoyancy generating gas is injected therein; a cycloidal turbine configured to be placed under the buoyant apparatus, and comprise a rotary shaft arranged to be substantially horizontal to the ground, and a plurality of blades arranged along a circumferential direction of the rotary shaft while their pitch center lines are long extended to be parallel with a center line of the rotary shaft and are spaced apart from the rotary shaft at a preset distance as being arranged to be substantially perpendicular to a flowing direction of fluid blowing from a front, having pitch angles individually adjustable with respect to the pitch center line; and a motor-generator configured to connect with the rotary shaft of the cycloidal turbine.

Abstract: An on-vehicle power generation control unit includes current detecting unit; communication unit; holding unit; maximum current determining unit; and current control unit. The current detecting unit detects the excitation current at the field winding. The communication unit communicates with an external equipment to receive a first upper limit. The holding unit holds a second upper limit. The maximum current determining unit determines a maximum current to be the second upper limit when the first upper limit has not received by the communication unit or when the received first upper limit is more than or equal to the second upper limit. Further, the maximum current determining unit determines the maximum current value to be the first upper limit when the received first upper limit is less than the second upper limit. The current control unit controls the detected excitation current to be within the maximum current value.

Abstract: A system is provided for controlling power generation. For example, the system may include a drive, an electrical generator coupled to the drive, and a controller coupled to the drive. The controller may include a stabilizing mode responsive to a utility signal representative of a grid destabilizing event.

Abstract: A wind mitigation system for attachment to a residential or commercial building to mitigate wind suction forces known to damage roof structures, and to harness wind energy to create electricity. The system may comprise one or more rotating cylinders which make use of the Magnus effect, a scientific phenomenon involving air flow over a rotating cylindrical object. Rotating Magnus cylinders are installed on the roof, preferably at or near the roof-wall junction of a building in order to provide the greatest suppression of perpendicular wind forces and resulting vortices. Wind flowing across the Magnus cylinders creates a downward force that is transferred to the roof by structural support brackets. The downward force counters the upward lifting forces generated by high winds so as to prevent uplifting of the roof structure. Electrical energy is generated from oscillations resulting from variations in wind speed.

Abstract: A downhole assembly including a turbine to be disposed within a wellbore and a rotating array. The rotating array includes magnetic material and is coupled to the turbine. The downhole assembly also includes a magnetostrictive material coupled to the rotating array to strain the magnetostrictive material to induce an electric current in a conductor coupled to the magnetostrictive material.

Abstract: The invention relates to a steam turbine governing system for maintaining synchronization between an electrical grid and an electric generator, driven by a steam turbine, after the occurrence of a grid short circuit at the electrical grid. The governing system includes a governor adapted to control an arrangement of valves for regulating the steam flow in the steam turbine and means for measuring the voltage drop at the output of the electric generator. The governing system further includes means for measuring the electric power drop at the output of the electric generator. The governor is adapted to initiate operation of the arrangement of valves of the steam turbine in response to a voltage drop exceeding a predetermined value and to an electric power drop exceeding a predetermined value.

Abstract: A power generating set includes an engine operable in response to a flow of fuel to produce a flow of exhaust gas. A generator is coupled to the engine and is operable in response to operation of the engine to produce a total electrical power, a primary load is electrically connected to the generator to receive a portion of the total electrical power, and a secondary load is selectively connected to the generator to receive a portion of the total electrical power. An insulated-gate bipolar transistor (IGBT) is positioned to selectively transition between a connected state and a disconnected state. The secondary load is connected to the generator when the IGBT is in the connected state and is disconnected from the generator when the IGBT is in the disconnected state.

Abstract: An emergency starting system and an emergency starting method of a fuel cell hybrid vehicle perform an emergency start when a DC power converter for starting fails. The emergency starting system includes: a fuel cell and a super capacitor connected through a main bus terminal in parallel; a driving inverter connected to the main bus terminal; a driving motor connected to the driving inverter; a balance-of-plant configured to activate the fuel cell; a starting DC power converter configured to drive the balance-of-plant; and a starting controller configured to control the super capacitor at the time of a start. The starting controller includes a super capacitor relay, an initial charging relay, and an initial charging resistor, the initial charging relay includes a plurality of relays, and the initial charging resistor includes a plurality of resistors.

Abstract: A process for increasing the excitation current, particularly when activating the alternator, whose rectified alternator voltage is regulated by way of a regulator, is provided. For regulating the alternator voltage, the regulator sets the excitation current of an excitation winding of the alternator. The regulator further receives a phase signal. A rapid increasing of the excitation current to a defined value takes place, during which the phase signal is analyzed simultaneously. This rapid increasing continues until the phase signal or a quantity derived therefrom meets a defined condition with respect to the alternator voltage. Therefore, a further increasing of the excitation current takes place, preferably at a rate of change reduced with respect to the previous rapid increase.

Abstract: An embodiment of a building may include a wind-energy-conversion system with a duct that may be a substantially vertical converging nozzle. An energy extractor may be fluidly coupled to the duct. For some embodiments, a space within the building may be part of the wind-energy-conversion system and may be fluidly coupled to the energy extractor by the duct.

Abstract: The present invention relates to a Darrieus windmill, and more specifically, to a vertical axis type Darrieus windmill that enables self-start in the low wind velocity range. The Darrieus windmill, in which a primary vertical shaft is rotated by the lift forces generated by primary blades, has a starting means for assisting the starting or rotation of the primary shaft at a low wind velocity. The present invention provides advantages of enabling self-start and rotation due to the lift generated by the blade in low wind velocity conditions and enabling the generation of rotating moments in any wind direction or wind velocity, thereby easily starting even in urban areas with very low wind velocities or large variations in wind direction, and thus enabling the generation of electricity over a wide range of wind velocities.

Abstract: An electrical generator system configured to convert an external actuation force applied by a vehicle traveling on a roadway into electrical energy is disclosed herein. The electrical generator system includes at least one electrical generator apparatus and a maintenance access assembly disposed adjacent to the at least one electrical generator apparatus. The maintenance access assembly includes a plurality of bounding walls defining a maintenance passageway for gaining service access to the at least one electrical generator apparatus. The maintenance access assembly further includes an access manhole disposed in an upper one of the plurality of bounding walls and above the maintenance passageway so as to facilitate access to the maintenance passageway.

Abstract: When a low voltage event occurs in a utility grid, a load on a spindle system is repressed so that a damage is prevented. A rotor having a plurality of wind turbine blades, a generator to be driven by rotation of the rotor, and a pitch angle controller for controlling a pitch angle of the wind turbine blade according to a generator speed are provided, and when a voltage of a utility grid is a predetermined value or less, the pitch angle controller controls the pitch angle so that torsional vibration generated on a spindle system for transmitting the rotation of the rotor to a generator system is repressed.

Abstract: A portable internal combustion engine and a charging device that generates AC power are supported on a manually movable frame. A coupling mechanism which can include a starter circuit and starting device, or a charging circuit and charging device, or both device couples a battery receptacle terminal block to the internal combustion engine. The battery receptacle can include various features to permit and retain electrical coupling between a battery pack for a cordless power tool. For example, key protrusions and corresponding recesses can be associating with latching projections. Additionally or alternatively, cooperating rails and recesses may be associated with the battery pack and receptacle, respectively. Spring loaded movable clips or resilient flexing clips can be included to act on the battery pack. An electrical cord may also be used to couple receptacle terminals to the coupling mechanism.