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7436085 |
Wind turbine provided with a controller for adjusting active annular plane area and the operating method thereof
A wind turbine which varies an active annular plane area by composing such that blades are attached to a cylindrical rotor movable in the radial direction of the rotor, the blades being...
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7437216 |
Method for controlling a wind energy turbine of a wind park comprising multiple wind energy turbines
The method for controlling a first wind energy turbine of a wind park comprising multiple wind energy turbines connected to the grid, in situations where the first energy turbine operates...
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7436084 |
Wind energy plant and method for use in erection of a wind energy plant
The object of one aspect of the invention is to develop a method by means of which the erection of wind power installations can be effected even more advantageously but in particular also more...
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7432610 |
Wind power installation with ring generator having a stator with groves to receive a stator winding
A wind power installation has a (ring) generator which has a stator in which grooves are provided at the inner or outer periphery in mutually spaced relationship to receive a stator winding. In...
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7432611 |
Power control interface between a wind farm and a power transmission system
A power control interface between an unstable power source such as a wind farm and a power transmission line employs an electrical energy storage, control system, and electronic compensation module...
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7427173 |
Power generation system utilizing wind draft from vehicular traffic
A system for electrical power generation by utilizing wind draft force from vehicle traveling on roadways provide two types of wind turbine apparatuses, one type is for road side which sits along...
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7427814 |
Wind turbine generators having wind assisted cooling systems and cooling methods
A wind generator includes: a nacelle; a hub carried by the nacelle and including at least a pair of wind turbine blades; and an electricity producing generator including a stator and a rotor...
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7425771 |
Variable speed wind turbine having an exciter machine and a power converter not connected to the grid
A variable speed wind turbine having a doubly fed induction generator (DFIG), includes an exciter machine mechanically coupled to the DFIG and a power converter placed between a rotor of the DFIG...
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7425776 |
Multi-cylinder wind powered generator
A multiple generator having a vertical post and multiple vertical tubes has the generators positioned vertically one above the other. Each is cylindrical in shape and has two rings separated by...
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7425772 |
Electric power generating system using ring-shaped generators
Electric power generator system using ring-shaped generators and essentially being formed of turbines and generators, and optionally converging-diverging nozzles. The turbines may optionally have...
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7423352 |
Vibration damping method for variable speed wind turbines
A vibration damping technique for a wind turbine system is described. The wind turbine system includes a vibration damper, which provides a variable signal to control torque produced by a generator...
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7420289 |
Method for predicting a power curve for a wind turbine
A method for calculating a high-altitude power curve for a wind turbine is provided, the method including the steps of determining a c p -λ curve for a predetermined blade pitch angle of said wind...
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7420288 |
Stall controller and triggering condition control features for a wind turbine
Control features for a wind turbine that control the turbine over a range of wind speeds and under triggering conditions with reduced noise, cost, and reliability issues associated with other such...
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7417332 |
Method and apparatus of monitoring a machine
A monitoring system for a machine is provided. The machine includes at least one movable member including at least one sensor configured to generate at least one speed measurement of the moveable...
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7417334 |
Wind power generation system, arrangement of permanent magnets, and electrical power-mechanical force converter
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...
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7411309 |
Control system for doubly fed induction generator
A controller ( 28 ) for a doubly fed induction generator ( 12,20 ) adjusts control signals to a rotor side converter ( 24 ) and line side converter ( 22 ) to adjust rotor current when a voltage...
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7403854 |
Method and apparatus for determining wind farm electricity production
A method and apparatus for providing wind farm electricity production values is described. Such an arrangement is useful in providing an indication of potential electricity production values from a...
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7400054 |
Method and assembly for detecting blade status in a wind turbine
Transponder technology is incorporated into the blades of a wind turbine to make it possible to transfer data wirelessly from each said blade to the associated tower. By providing a transponder...
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7400057 |
Omni-directional wind turbine
An omni directional, vertical discharge wind turbine, consisting of a shroud that captures wind from any direction and directs it to flow vertically through a throat section where an aerofoil...
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7400055 |
Wind turbine generator
A wind turbine generator includes: a tower; a rotor supported by the tower to rotate around a rotational axis which is not parallel with an axis direction of the tower by wind power; a generator...
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7397143 |
Methods and apparatus for supplying and/or absorbing reactive power
A wind turbine includes a rotor having a hub, at least one rotor blade coupled to the hub, and a rotor shaft coupled to said hub for rotation therewith. The wind turbine also includes an electrical...
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7397145 |
Automatic braking and locking of a wind turbine
A wind turbine rotor is decelerated and locked in a target rotational position in relation to rotation of the rotor about the rotor axis. The rotational position of the rotor in relation to the...
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7394166 |
Method, apparatus and computer program product for wind turbine start-up and operation without grid power
A wind turbine having features for black-starting includes an electric generation system for producing electricity by operation of the wind and comprising an interface for providing the electricity...
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7391128 |
Wind generator system using attractive magnetic forces to reduce the load on the bearings
A wind generator system includes a stationary frame, a shaft, mechanical bearings and a stator and a rotor, along with magnetic components configured to reduce or substantially eliminate various...
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7385305 |
Wind power generator and bearing structure therefor
The invention relates to a wind power current generator comprising a bearing, a tubular stator that carries a race of the bearing, a tubular rotor coaxial with the tubular stator that can rotate in...
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7385306 |
wind power generator including blade arrangement
The invention relates to a wind power current generator comprising a bearing, a tubular stator that carries a race of the bearing, a tubular rotor coaxial with the tubular stator that can rotate in...
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7385304 |
Wind warning system
A wind warning system. The system includes: an alarm module configured to provide a audio signal; a power module configured to provide power to the alarm module; and a trigger module configured to...
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7385302 |
Wind turbine having variable pitch airfoils
A wind turbine, having: a rotatable frame; a plurality of airfoils mounted to the rotatable frame, the wherein the airfoils extend parallel to an axis of rotation of the rotatable frame, and...
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7378820 |
Electrical power generation system and method for generating electrical power
An electrical power generation system and method for generating electrical power are provided. The electrical power generation system utilizes a master controller for controlling operation of...
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7372173 |
Wind farm and method for operating same
A wind farm with at least two wind turbines ( 1, 2, 3, 4 ) connected to a power grid is provided, said wind farm further comprising a control unit ( 5 ) connected to said at least two wind turbines...
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7372171 |
Fire protection
The present invention concerns a wind power installation comprising a pylon and a pod arranged at the tip of the pylon. The invention further concerns a method of controlling such a wind power...
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7368828 |
Wind energy system
A wind energy system comprising a queue of turbines housed in a horizontal air conduit. The inlet end of the conduit opens into a wind collector assembly, which preferably comprises in part...
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7365447 |
Horizontal axis wind turbine
Disclosed is a horizontal axis wind turbine of an downwind type having a rotor disposed downwind of a tower, comprising: a rotor having a hub and a blade; a nacelle to support the rotor rotatably...
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7365446 |
Wind power plant having power module mounted on tower foundation and method for use in constructing same
The invention relates to a method for constructing a wind energy plant and to a wind energy plant as such. An aim of one aspect of the invention is to provide a method for constructing wind energy...
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7365448 |
Wind driven power generator
A wind driven generator includes a rotor disposed in a cylindrical duct and supported by a frame for rotation in response to wind flowing through the duct. The rotor includes plural...
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7360310 |
Method for changing removable bearing for a wind turbine generator
A wind generator having removable change-out bearings includes a rotor and a stator, locking bolts configured to lock the rotor and stator, a removable bearing sub-assembly having at least one...
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7362004 |
Wind turbine device
A hybrid blade wind turbine device formed of at least a pair of straight outer airfoil blades, and a pair of inner helical wing blades, as supported for rotation within a safety protective cage...
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7358623 |
Generator
A wind powered generator that includes first and second current generators arranged to generate electric current in response to relative rotation between the two current generators. At least one...
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7355296 |
Wind turbine generator system
To shorten a startup interval to reach a synchronizing condition, a phase difference and an amplitude difference between the grid voltage and the stator voltage of one phase of a winding are...
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7355294 |
Method and system for wind turbine blade movement
This document discusses, among other things, a wind turbine blade pitch system for moving the blades to control their pitch in the event of a power failure. The system includes at least one backup...
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7352076 |
Small wind turbine system
A small wind-powered electricity generation system, providing regulated AC electric power from wind energy to a power system grid, has a wind turbine that produces less than 10 kW of peak electric...
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7352075 |
Methods and apparatus for controlling rotational speed of a rotor
A method for controlling a rotational speed of a rotor having at least one rotor blade, a rotor shaft, and an electrical generator coupled thereto. The method includes controlling a torque of the...
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7348683 |
Rotor for a wind energy turbine
A the rotor for a wind energy turbine includes a hub and at least one rotor blade connected to the hub. The rotor also includes comprises at least one sensor for sensing at least one physical value...
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7345375 |
Wind power generation apparatus
Disclosed relates to a wind power generation apparatus and, more particularly, to a multi-direction wind power generation apparatus, which can be easily, solidly and largely manufactured and also...
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7345377 |
Wind wheel and electricity generator using same
A wind-driven power source comprises a propeller-driven rotor structure and a stator structure carrying clusters of copper-wire wound ferromagnetic cores as voltage generators. The cores are...
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7345374 |
Decorative windmill with solar panel
A decorative windmill having a solar energy system for powering an electrical subsystem is disclosed. The electrical subsystem may include lighting elements for illuminating the windmill and the...
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7345376 |
Passively cooled direct drive wind turbine
A wind turbine is provided that passively cools an electrical generator. The wind turbine includes a plurality of fins arranged peripherally around a generator house. Each of the fins being...
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7342323 |
System and method for upwind speed based control of a wind turbine
A method for controlling power output of a wind turbine generator in response to an anticipated change in wind speed is provided. The method includes sensing wind speed at a desired distance from...
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7339286 |
Portable wind power generator
A portable wind power generator capable of being stored in a folded manner includes a storage case and a power-generating system. The power-generating system is disposed in the storage case. The...
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7332827 |
Method for controlling a power-grid connected wind turbine generator during grid faults and apparatus for implementing said method
The present invention relates to a method and an apparatus for controlling a power-grid connected wind turbine generator during grid faults. During grid faults, the stator windings of the wind...
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