2509 results about "Wind power system" patented technology

A variable speed wind turbine employing a rotor connected to a multiplicity of synchronous generators with wound field or permanent magnet rotors. A passive rectifier and an inverter are used for power transfer back to the grid. A Turbine Control Unit (TCU) commands a required generator torque based on rotor speed and power output of the turbine inverters. Torque is controlled by regulating the DC current by control of the inverter. A main-shaft-damping filter is provided by measurement of the DC bus voltage. In high winds the turbine remains at a constant average output power through a constant torque command and a varying pitch command to a rotor pitch servo system. A set point is fixed at the inverter output such that output VAR load is minimized running the turbine at very nearly unity power factor. Dynamic VAR and power factor control is provided by a separate VAR apparatus.

A variable speed wind turbine employing a rotor connected to a multiplicity of synchronous generators with wound field or permanent magnet rotors. A passive rectifier and an inverter are used for power transfer back to the grid. A Turbine Control Unit (TCU) commands a required generator torque based on rotor speed and power output of the turbine inverters. Torque is controlled by regulating the DC current by control of the inverter. A main-shaft-damping filter is provided by measurement of the DC bus voltage. In high winds the turbine remains at a constant average output power through a constant torque command and a varying pitch command to a rotor pitch servo system. A set point is fixed at the inverter output such that output VAR load is minimized running the turbine at very nearly unity power factor. Dynamic VAR and power factor control is provided by a separate VAR apparatus.

A wind power generation system capable of outputting generated power at high efficiency with a smoothed output power includes a wind power generator and a laser aerovane mounted on the wind power generator or located near the wind power generator. Direction and velocity of wind blowing toward the wind power generator are observed using the laser aerovane, and a yaw angle and / or a pitch angle of the wind power generator is predicted and controlled based on the observation results. Thus, high-efficiency control of the wind power generation system, including the wind power generator, is achieved. An output-smoothing device connected to the wind power generator predicts and controls electric power input / output of the output-smoothing device based on a predicted power output of the wind power generator and smoothes the power output of the wind power generation system.

A wind power generation system wherein procedure for controlling the blade pitch is changed in accordance with the rate of decrease in the amplitude of the grid voltage, and when over current occurs in the grid-side power converter, the grid-side power converter is brought into the gate-blocked condition whereas the generator-side power converter continues its operation.

A wind power generating apparatus is provided. The apparatus includes a plurality of vertically stacked wind acceleration modules that are shaped to accelerate wind passing between them. At least one of the modules includes a rotor assembly, a continuously variable transmission (CVT) mechanically coupled to the rotor assembly, and an electrical generator mechanically coupled to the CVT. The electrical generator is capable of converting mechanical energy transferred by the CVT from the rotor assembly into electrical energy. A sensor may be mechanically coupled to the rotor assembly or the electrical generator and electrically coupled to a controller. The controller may control the CVT according to a signal received from the sensor such that the electrical generator operates within a predetermined range of rotational velocities.

Disclosed is a vehicle using wind force. An object of the present invention is to provide a wind force power system driven by wind is provided within a hood panel of the vehicle, whereby the vehicle continuously charge a battery with electricity while being stopped or driving. The vehicle using wind force includes a wind force power system, the Power system comprising a ventilator that is rotated by the wind flowing along the roof panel in the rear of the vehicle, a shaft connected to the ventilator, a rotary gear connected to the shaft, a follower gear engaged with the rotary gear, and an electric generator for generating electricity as the follower gear rotates, wherein the electric generator of the wind force power system is electrically connected to the battery and the battery is electrically connected to the driving motor.

A wind power generation system having a group of wind turbine generators includes a superior controller having a generation power recording memory to record a sum of a generation power of the group of wind turbine generators and a charge and discharge power of a power storage system, a charge and discharge power command computing device for computing a charge and discharge power command for the power storage system in a second period by making use of information of the output power in a first period computed in the output power computing unit and information of a detection value at the present of the generation power recording memory, and a charge and discharge power control device.

The supercapacitor-based grid fault ride-through system provides a dynamic model of a wind generation system including a Voltage Source Converter (VSC), which functions as a Static Compensator (STATCOM). The power control capability of the STATCOM is extended by incorporating energy stored in a supercapacitor. The system implements a vector control technique based on the decoupling of real and reactive power. Simulation results show that a fixed speed induction generator is capable of withstanding a significant grid fault when aided by the supercapacitor-based grid fault ride-through system. Moreover, the induction generator regains its pre-fault status immediately after the fault is cleared.

A system and method for efficiently capturing electrical energy from a variable-speed generator are disclosed. The system includes a matrix converter using full-bridge, multilevel switch cells, in which semiconductor devices are clamped to a known constant DC voltage of a capacitor. The multilevel matrix converter is capable of generating multilevel voltage wave waveform of arbitrary magnitude and frequencies. The matrix converter can be controlled by using space vector modulation.

A system for the generation of electrical power using an improved 600-watt to 900-watt wind turbine system. The system comprises a wind driven generator utilizing an array of uni-directional carbon fiber turbine blades, an air-ducting nose cone, and a supporting tower structure. Additionally, a method of blade fabrication utilizing expanding foam, to achieve improved blade edge strength, is disclosed. The support tower utilizes a compressive coupler that permits standard fence pipe to be joined without welding or drilling.

A wind power generation system 10 comprising a frame, an impeller 12 rotatably supported by the frame, plural permanent magnets 31 aligned at equal intervals from the rotation center, and coils 32 aligned annularly on the frame. The relative motion of the permanent magnets 31 and the coils 32 in close vicinity generates electric powers by the inverse action of a linear motor. The coils 32 are mounted on the ring provided on the frame, and the permanent magnets 31 are provided on the lower end of the longitudinal blades 26 of the impeller.

A wind power energy system includes a compression system that produces pressurized air with a first temperature that is received by a storage system at a second temperature that is approximately equal to the first temperature. The wind power energy system is insulated with about ten centimeters of glass-wool insulation to create an essentially adiabatic system. The pressurized air is utilized by a generator and generate electricity for a power grid. The generator also includes a combustion engine input. A control system detects fluctuation in wind power and commands the combustion engine to provide an appropriate amount of input energy to the generator such that the sum of the wind energy and combustion engine inputs produces a predetermined amount of electrical output by the generator.

A power generation plant ship (1) of the present invention having a body (2) with a propulsion mechanism (7) includes a solar power generation system (3), a wind power generation system (4) for obtaining electric energy by driving a generator by rotating a windmill (4a) by receiving wind power, and a storage battery (6) for storing the electric energy generated by the respective power generation systems (3, 4).

The invention discloses an alternating current and direct current hybrid micro-grid system and a control strategy of the micro-grid system. The micro-grid system comprises multiple generation units, load, a distribution line for connecting the generation units and the loads, and a monitoring protection unit; each generation unit comprises a large power grid, grid-connected AC / DC (alternating current / direct current) of the large power grid, an energy storage system, a DC / DC (direct current / direct current) converter of the energy storage system, a wind power generation system, an AC / DC converter of the wind power generation system, a photovoltaic power generation system, a DC / DC converter of the photovoltaic power generation system, and a diesel generator; said load includes AC non-significant load, AC significant load, AC / DC load, DC significant load and DC non-significant load; the distribution line comprises a DC distribution line and an AC distribution line; the operating status of each energy conversion device can be monitored in real time by the monitoring protection unit, two operating ways such as grid connection and isolation of the system can be realized by different control strategies, the distributive generation unit and the energy storage unit realize coordination and cooperation by controlling energy storage DC / DC, photovoltaic DC / DC, and wind power AC / DC, so that the power supply reliability is improved and the significant load can continuously operate.

An interface device transmits a reactive power command depending on a power system from a voltage regulation device of the power system to a wind power generation apparatus electrically connected to the power system, and the wind power generation apparatus receives the reactive power command. Then, the wind power generation apparatus outputs reactive power according to a value obtained by adding, to a reactive power command, another reactive power command for suppression of voltage fluctuation caused by output power of the wind power generation apparatus.

The invention is relative to a transport vehicle with a tractor and a trailer that are connected to one another during the transport of cargo by the cargo itself. The invention has the problem of making a transport vehicle available that also makes possible the transport on highways of very bulky material, especially such material that exceeds the usual profile height of underpasses and bridges (freeway bridges, etc.). A transport vehicle for a rotor blade of a wind power system with a tractor and a trailer that are connected to one another during the transport of the rotor blade by the rotor blade and that respectively comprise a holding device and / or receiving device for the rotor blade which holding device and / or receiving device is / are designed in such a manner that it / they permit(s) a rotation of the rotor blade about its longitudinal axis and that a drive for rotating the rotor blade is provided on the tractor and / or the trailer.

A direct current brushless electric machine is described that comprises a sequence of permanent magnets where the N and S magnetic poles being alternately arranged adjacent to each other, each exerting a magnetic field; phase coils are composed of a group of conductors, each conductor being laid essentially in parallel with each other, each coil being displaced by a full range of a single magnetic pole of the permanent magnet, such that each phase coil is alternately disposed adjacent to each other; and magnetic field or every other coil is in the same orientation to form an armature positioned opposite to the permanent magnet movable with respect to the armature with a predetermined amount of air gap provided between the phase coils and the permanent magnets. The electric machine operates as a generator when the power is flowing from a prime mover, such as the turbine blade extracting energy from the wind or water. The electric machine operates as a motor when the current is applied to the coils in a sequence to move the rotor when the turbine blades move the wind or water.Also described is an aerodynamic system comprising inner and outer annulus disposed driving fans, with a pressure differential flow enhancing aerodynamic housing, able to concentrate and make laminar rough and turbulent intake air molecule flows, creating a smooth rotationally organized downstream vortex field, with maximum power extraction from building structure directed velocity flow enhancements.

The invention is a control algorithm that uses detected current and voltage to estimate the real-time value of the stator resistance and speed of the wind power generator, and uses the speed estimated by the algorithm as speed feedback to control the permanent magnet synchronous wind power generator. The speed value is estimated in the following way: According to the motor stator voltage and current value obtained by detection, the stator resistance value of the wind turbine is identified online based on the model reference adaptive system (MRAS), and the estimated electrical angle and the actual electrical angle of the rotor are obtained based on the back electromotive force. Error calculation formula, the fan speed is estimated by eliminating this error. The current and voltage values ​​in the electrical angle error calculation formula are obtained by detection, the stator resistance value that changes during generator operation is obtained by MRAS identification, and the differential term of the stator current is realized by a tracking differentiator (TD), so that it can be estimated more accurately and quickly Rotating speed.

The invention relates to a portable, skid mounted, wheeled and / or collapsible hybrid-power lighting and energy management system for harsh, remote and / or high latitude locations. The system combines an internal combustion engine (ICE) power source with a control system for providing power to light system. The system may also include a battery storage system, an ICE heating system and / or renewable solar and / or wind power systems in a manner that improves efficiency and reliability of operation in such locations, while preserving and improving functionality of operation and significantly reducing operator interaction during set-up and operation.

A wind-energy power machine and it's energy-storage generation system and wind-energy power generation system relate to a field of wind-energy power, generating technology and generating device. The wind-energy power machine is composed of a central rotor, a plurality sets of frames and at least a set of wind-pressure pushing mechanism provided within each set of frame. The central rotor vertically rotatablely mounted within a mounting frame in a special high-story frame structure with wind collecting wall is formed to a large scale power and generating system by means of combining with vertical or horizontal integrated system, or both systems in series and in parallel.

A system for capturing and converting and / or storing wind energy includes a vessel adapted to receive at least one wind machine for capturing wind and a device for converting wind energy to storable energy. A method of adapting a vessel, such as a surplus cargo ship or an oil tanker, for use as a offshore power generating system comprises equipping a vessel with devices for capturing a renewable energy source, positioning the vessel at sea to capture the renewable energy source, converting the renewable energy to a storable energy source, and storing the converted energy, and repositioning the vessel to capture further renewable energy or transport the stored, converted energy.

The invention discloses a grid-connected non-networking micro-grid system and a control protection method thereof. On the premise of basically not changing the structure of the original power distribution system, multiple types of distributed power sources, such as wind power generation system, photovoltaic power generation system, cell accumulation system and the like, are connected into a common power grid along with user loads through AC buses, and reasonable load layout and active energy management are utilized to implement grid-connected non-networking of the micro-grid system. By using the structural design and the active energy management of the micro-grid central control unit, the new energy power generation system can be completely self-sufficient, and does not reversely transmit power to the common power grid, thereby avoiding impacting the normal power supply of the common power grid; and meanwhile, by the aid of the common power grid, the user loads have higher power supply reliability and electric power quality.

A wind power generation system temporarily stops a power converter when a system disturbance occurs, and reactivates the power converter after detecting a solution of the problem of an influence (overcurrent of a stator, direct current component of a stator, overcurrent of a rotor, etc.) of a fault occurring in a doubly-fed generator during a system fault. During a system fault, a reactive current can be safely output from a doubly-fed generator to an electric power system without destroying equipment of the wind power generation system.

The utility model provides a back-to-back convertor of a wind power generation system. Two back-to-back convertors are connected in parallel. Each convertor comprises rectifiers on the side of a motor and an inverter on the side of a grid. The rectifiers on the side of the motor are conncted in parallel. An AC input end is connected with an outlet terminal on the side of a stator of a magneto alternator; direct-current output terminals of the two rectifiers on the side of the motor are connected with an independent voltage-stabilizing large capacitor, respectively. A positive terminal and a negative terminal of each of the capacitors are conneted with an inverter, respectively; output terminals of the inverters are connected to a grid after parallel connection. Each rectifier on the side of the motor is controlled by a digital processing chip DSP. When the two convertors run concurrently, circulatory zero-sequence current of the shunt circuit between the convertors is restricted to bezero; circuit loss is accordingly reduced, and circuit components are protected.

Disclosed are a grid-connected converter device of a direct-drive wind power system and a corresponding power coordination control method. The converter device is composed of basic converter units of a Boost circuit based on ac-side energy storage; the structure sufficiently utilizes the equivalent inductance of a power generator stator winding, avoids an external inductor in traditional dc voltage booster circuit, and reduces power loss and equipment cost. Two converter proposals, including a diode rectification mode and a PWM rectification mode are designed; converter topologies with two capacity grades, including medium and small power converter topology, megawatt grade high power converter topology, and relative extension structures are designed, such as a parallel connection converter and an H bridge cascade structure converter; wherein, the converter with the H bridge cascade structure is applicable to grids with high capacity and high voltage, and can obviously reduce the harmonic content in grid-connected current; meanwhile, the control method performing feedback through three closed loops is designed, so the input power and output power of the converter are balanced instantaneously, the dc bus voltage maintains stable, and the grid-connected current wave is sine.

The invention relates to a method of registering events in a wind power system comprising at least two data processors, wherein the data processors of said wind power system are mutually time synchronized, wherein events are registered in said at least two data processors, wherein the timing of said events registered in different of said at least two data processors is established according to said time synchronization. According to an advantageous embodiment of the invention, events may be registered and preferably analyzed according to a common timing. This analyzing makes it possible to establish an analysis where events of different wind turbines are basically interrelated and where information regarding such interrelation is important or crucial for establishment of control or fault detection based on correctly timed events from different wind turbines.

The invention is relative to a transport vehicle with a tractor and a trailer that are connected to one another during the transport of cargo by the cargo itself. The invention has the problem of making a transport vehicle available that also makes possible the transport on highways of very bulky material, especially such material that exceeds the usual profile height of underpasses and bridges (freeway bridges, etc.). A transport vehicle for a rotor blade of a wind power system with a tractor and a trailer that are connected to one another during the transport of the rotor blade by the rotor blade and that respectively comprise a holding device and / or receiving device for the rotor blade which holding device and / or receiving device is / are designed in such a manner that it / they permit(s) a rotation of the rotor blade about its longitudinal axis and that a drive for rotating the rotor blade is provided on the tractor and / or the trailer.