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US20090284012 |
Tower Construction for a Wind Turbine
A handling system for a wind turbine nacelle in connection with self-loading or self-unloading of the nacelle to or from a vehicle. The system comprises two or more lifting apparatus, where the...
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US20090281675 |
System And Method For Monitoring And Control Of Wind Farms
A wind farm monitoring and control system, includes at least one wind farm, at least one intelligent management server connectable to the at least one wind farm via a data communication network,...
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US20090278354 |
Wind turbine generator system
In a wind turbine generator system including an AC exciting converter a grid side converter, and a controller configured to control the AC-exciting converter and the grid side converter, the...
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US20090278353 |
ATMOSPHERIC RESOURCES EXPLORER
The invention herein described consists of a system destined to harness wind resources, transferring wind power to the ground station group on the surface, the process being performed through the...
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US20090278352 |
DYNAMIC ELECTRIC BRAKE FOR A 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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US20090278351 |
HIGH VOLTAGE DIRECT CURRENT LINK TRANSMISSION SYSTEM FOR VARIABLE SPEED WIND TURBINE
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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US20090273192 |
Doubly fed axial flux induction generator
A doubly fed axial flux induction generator may include a prime mover configured to provide mechanical energy. The doubly fed axial flux induction generator may also include a rotor assembly...
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US20090273187 |
Control Method
A generator of a wind turbine is at low power conditions operated as a motor by control of a frequency converter to feed electric power from an electric power transmission network to the generator...
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US20090273186 |
WINDMILL UTILIZING A FLUID DRIVEN PUMP
A windmill apparatus includes tower, a tower-mounted hydraulic pump driven by windmill blades, and hydraulic lines connected to a ground storage tank and to a number of separate generator units....
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US20090273185 |
System for Controlling and Protecting Against Symmetrical and Asymmetrical Faults for Asynchronous-Type Generators
The invention relates to a system for controlling and protecting against symmetrical and asymmetrical faults for double-fed asynchronous-type generators, which, in the event of a symmetrical or...
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US20090267347 |
PELATIC SUSTAINABLE ENERGY SYSTEM
The present invention provides a sustainable energy system for pelagic deployment that may comprise a frame, at least one wind turbine generator coupled to the frame, at least one pair of water...
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US20090261589 |
Wind Power Generation System And Operation Method Thereof
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...
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US20090261588 |
METHOD AND SYSTEM FOR OPERATING A WIND ENERGY INSTALLATION
A method for operating a wind energy installation and a system for implementing the method. An oblique incident flow value, which represents the difference between the wind direction and the...
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US20090254223 |
Method For Operating A Wind Turbine Connected To A Utility Grid During A Utility Disturbance, Wind Turbine And Wind Park
The invention relates to a method for operating a wind turbine connected to a utility grid during a utility grid disturbance. The method comprises the steps of controlling active current in...
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US20090250932 |
Method of damping tower vibrations of a wind turbine and control system for wind turbines
A control system for a wind turbine is provided. A pitch-control unit establishes a pitch-reference signal representing a pitch to be set by the pitch-actuator system. A rotor-speed input receives...
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US20090250931 |
METHOD FOR OPERATING A WIND ENERGY PLANT WITH A DOUBLY-FED ASYNCHRONOUS MACHINE AND WIND ENERGY PLANT WITH A DOUBLY-FED ASYNCHRONOUS MACHINE
Method for operating a wind energy plant having a doubly-fed asynchronous machine, a grid-sided converter and a generator-sided converter both being controlled by a control means, the method...
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US20090243297 |
SPEED REDUCER FOR USE IN YAW DRIVE APPARATUS FOR WIND POWER GENERATION APPARATUS, AND YAW DRIVE METHOD AND APPARATUS FOR WIND POWER GENERATION APPARATUS USING THE SPEED REDUCER
A yaw drive method of a wind power generation apparatus, in which a second gear engaged with a first gear attached to one of tower or a wind power generation unit supported to the upper end of the...
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US20090243296 |
WIND ENERGY INSTALLATION WITH AN AUTONOMOUS ENERGY SUPPLY FOR A BLADE ADJUSTMENT DEVICE
Wind energy installation with a generator ( 13 ) which is driven by a rotor ( 2 ) with adjustable rotor blades ( 21 ), for producing electrical energy, wherein a pitch adjustment device ( 3 ) is...
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US20090243295 |
SYSTEM AND METHOD FOR REDUCING ROTOR LOADS IN A WIND TURBINE UPON DETECTION OF BLADE-PITCH FAILURE AND LOSS OF COUNTER-TORQUE
A system and method for reducing rotor loads in a wind turbine that includes a brake and one or more rotor blades coupled to a rotor. Upon detection of a loss of counter torque and a blade-pitch...
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US20090236853 |
MICRO-ELECTROMECHANICAL CURRENT SENSING APPARATUS
A micro-electromechanical (MEMS) current sensing apparatus includes a carrier portion, an optical portion disposed on the carrier portion, the optical portion including an optical path and a...
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US20090234510 |
Method For Controlling A Cluster Of Wind Turbines Connected To A Utility Grid, Method For Planning The Strategy Of A Utility Grid Including A Wind Turbine Cluster Connected To The Grid And Wind Turbine Cluster
A method for controlling a cluster of wind turbines connected to a utility grid includes the steps of determining the frequency of the utility grid, detecting a frequency deviation in the utility...
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US20090230682 |
Apparatus and method for determining a resonant frequency of a wind turbine tower
An apparatus for determining a resonant frequency of a wind turbine tower is provided. The apparatus includes a processing unit configured to receive an acceleration measurement value, the...
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US20090230681 |
MODEL BASED WIND TURBINE DRIVE TRAIN VIBRATION DAMPER
The invention concerns a method for reducing mechanical oscillation in a wind power plant which comprises a plurality of rotor blades, a wind turbine drive train and a generator, wherein the rotor...
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US20090224543 |
Method for the operation of a wind power plant and wind power plant
A method for the operation of a wind power plant ( 10 ) with a rotor ( 12 ), which has at least one angle-adjustable rotor blade ( 14 ), wherein the wind power plant ( 10 ) is operated in a first...
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US20090224542 |
WIND TURBINE OPERATIONAL METHOD
Operation method for a variable speed wind turbine which comprises control methods for blade pitch in cases of extreme gusts of wind, characterised by the fact that it is comprised of the following...
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US20090218820 |
Power Converter Arrangement and Method
A power converter arrangement for connecting an induction generator to an electric power network comprises a first path provided for transferring electric power from the induction generator to the...
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US20090218819 |
AUTOMATIC GENERATION CONTROL AUGMENTATION FOR WIND PLANT INTEGRATION
An automatic generation control (AGC) augmentation system and method for wind power plant integration for controlling the power contribution to a grid by the wind plant is disclosed that provides...
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US20090218818 |
WIND TURBINE PLANT HIGH WIND DERATING CONTROL
A method for operating a wind turbine plant including providing a plurality of wind turbines each having a turbine rotor including at least one blade mounted to a rotatable turbine shaft and an...
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US20090218817 |
WINDFARM COLLECTOR SYSTEM LOSS OPTIMIZATION
A windfarm system is provided that is optimized for minimizing electrical loss. The windfarm system includes a plurality of wind turbine generators and a collector system including a conductor or...
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US20090212568 |
ENERGY SYSTEM
An energy system is specified, which comprises a wind power turbine or water power turbine, which is connected to a generator, with the generator having at least two stator windings. In order to...
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US20090212567 |
CONTROLLER FOR A BLADE ADJUSTMENT ANGLE OF AT LEAST ONE ROTOR BLADE OF A WIND POWER PLANT
Controller for a blade adjustment angle for at least one rotor blade of a wind power plant, in which a first controller branch is switched for the determination of the blade adjustment angle...
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US20090212566 |
METHOD FOR OPERATING A WIND ENERGY PLANT AND WIND ENERGY PLANT
The invention relates to a method for operating a wind energy plant, the wind energy plant having a rotor with at least one rotor blade which has an adjustable pitch angle, the wind energy plant...
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US20090212565 |
WIND ENERGY PLANT WITH PITCH CONTROLLER
A wind energy plant having at least one rotor blade with a pitch angle, the pitch angle being adjustable by means of a pitch controller, and a generator converter unit, at least one electrical...
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US20090212564 |
Method and apparatus for assembling electrical machines
A method of assembling an electrical machine includes programming at least one processor with a stator flux vector estimation scheme. The electrical machine has a stator at least partially...
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US20090212563 |
SYSTEM AND METHOD FOR IMPROVING PERFORMANCE OF POWER CONSTRAINED WIND POWER PLANT
A wind turbine power generating system includes at least one wind-driven rotor for transforming wind energy into rotational motion. A plurality of turbine generators is connected to one or more...
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US20090206607 |
POWER GENERATOR AND MOTOR DEVICE
The fluid power generator is provided. The fluid power generator includes: a rotating member that rotates by fluid force; a generator motor that is mechanically linked with the rotating member and...
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US20090206606 |
Variable Speed Wind Turbine Configured For Wind Farm Operation
The present invention relates to an improved wind turbine, of the type which employs doubly fed induction generators (DFIG), and a wind park including the same, which permits the use of lighter...
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US20090206605 |
METHOD FOR THE OPERATION OF A WIND ENERGY PLANT
A method for the operation of a wind energy plant, with an operation management, which can preset a desired value for an electric variable of the wind energy plant to be generated; a wind...
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US20090206604 |
METHOD OF TRANSPORTING BULKY EQUIPMENT OF A WIND POWER PLANT, PREASSEMBLED EQUIPMENT
The invention relates to preassembled equipment and a method of transporting bulky equipment of a wind power plant from a preassembly site to an installation site, the equipment comprising at least...
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US20090206603 |
Method of maintaining wind turbine components operational and a turbine comprising components suitable for operational maintenace
The invention relates to a wind turbine ( 1 ) which is connected to an electrical power grid ( 23 ) and which uses a magnet generator ( 6 ) as the only electrical power generator element both in...
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US20090200804 |
Method For Damping Tower Oscillations, An Active Stall Controlled Wind Turbine And Use Hereof
The invention relates to a method for damping tower oscillations in the tower of an active stall controlled wind turbine. The method comprises the steps of operating two or more blades of the wind...
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US20090200803 |
WIND POWER GENERATION SYSTEM
In a wind power generation system, an AC input of a unit for coping with system faults is connected to an excitation converter and a DC port of the unit for coping with system faults is connected...
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US20090194995 |
POWER GENERATION STABILIZATION CONTROL SYSTEMS AND METHODS
A stabilization system for a power generation system including non-conventional energy source coupled to a utility grid, the stabilization system comprising: a deadband limiter configured for...
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US20090189394 |
MOMENTUM-CONSERVING WIND-DRIVEN ELECTRICAL GENERATOR
Wind-driven electrical generators will slow and lose kinetic energy when the wind slows or stops. When the wind slows or stops, kinetic energy in the rotating turbine and other rotating components...
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US20090189393 |
MICRO WIND TURBINE TOPOLOGY FOR SMALL SCALE POWER GENERATION
A wind energy converter has a generator adapted to be coupled directly to a wind turbine without need for a mechanical gear unit. A rectifier is coupled to the generator and a converter is coupled...
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US20090185658 |
CONTACTLESS POWER AND DATA TRANSMISSION APPARATUS
Methods and apparatus for an imaging system are provided. The imaging system includes a gantry having a stationary member coupled to a rotating member. The rotating member has an opened area...
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US20090184519 |
SPEED CONTROLLED PITCH SYSTEM
The present patent application concerns wind turbine having a rotor with a first rotor blade and a pitch control system with a first drive system for adjusting a pitch angle of the first rotor...
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US20090174187 |
Methods For Controlling A Wind Turbine Connected To The Utility Grid, Wind Turbine And Wind Park
The invention relates to methods for controlling a wind turbine connected to the utility grid by detecting status of the utility grid, and controlling one or more rotor blades and/or emitted power...
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US20090174186 |
Method For Controlling A Wind Turbine Connected To The Utility Grid, Wind Turbine And Wind Park
The invention relates to a method for controlling a wind turbine connected to the utility grid comprising steps of detecting a fault of the utility grid, and controlling one or more rotor blades in...
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US20090167095 |
CONNECTION AND DISCONNECTION SEQUENCE FOR 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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