Solicitudes publicadas en los últimos 15 días / Applications published in the last 15 days
NºPublicación: EP3158188A1 26/04/2017
SIEMENS AG [DE]
A noise reducing wind turbine blade is disclosed. The wind turbine blade includes a blade body having a leading edge, a trailing edge, a suction side, and a pressure side. The wind turbine blade further includes a noise reducer disposed on a portion of the blade body extending partially upstream from the trailing edge for modifying airflow over the blade body effective to reduce acoustic emission.
NºPublicación: EP3158192A1 26/04/2017
ABU AL-RUBB KHALIL [QA]
A wind turbine comprising first and second rotatable blade arrangements, the second arrangement being operable to power rotation of the first arrangement. Preferably, the second arrangement is rotatable at a lower wind speed than the first arrangement and the first arrangement comprises a plurality of blades 124 having a greater diameter than the blades 142, 144 of the second arrangement. The arrangements are preferably coupled via electrical, pneumatic or mechanical means. The first arrangement preferably further comprises means 128, 130, 134, 136, 137 for varying the moment of inertia of each blade of the arrangement independently or simultaneously. This may be achieved by pumping fluid in to a void 137 within a blade, by varying the distance between a blade and the axis of rotation of the first arrangement or by controlling the flow of fluid in to and out of chambers within the hub of the first arrangement. The invention increases the range of wind speeds at which the turbine can produce power.
NºPublicación: EP3158191A1 26/04/2017
VESTAS WIND SYS AS [DK]
A wind turbine is controlled in response to an estimate of vertical and/or horizontal wind shear. A tilt moment is estimated from flapwise and edgewise blade bending moments, azimuth and blade pitch positions and used to estimate vertical wind shear. A yaw moment is also estimated from flapwise and edgewise blade bending moments, azimuth and pitch position and used to estimate horizontal wind shear. A tip speed ratio is determined from an estimate of wind velocity over the rotor plane and is used to set a blade pitch angle which is passed to a blade pitch controller. The pitching may be collective or individual. In the latter case, the tip speed ratio is determined from a plurality of rotor plane positions to derive a cyclic pitch reference for each blade.
NºPublicación: EP3158187A1 26/04/2017
WOBBEN PROPERTIES GMBH [DE]
The invention relates to a wind turbine rotor blade (200) comprising a first rotor blade section (201) and a second rotor blade section (202). The first and second rotor blade sections (201, 202) form a total length (L) of the rotor blade (200), and the first rotor blade section (201) and the second rotor blade section (202) can be moved relative to each other by a centrifugal force acting along a longitudinal axis (214) of the rotor blade (200) when the rotor blade (200) rotates, such that the total length (L) of the rotor blade (200) is variable.
NºPublicación: EP3159537A1 26/04/2017
HITACHI LTD [JP]
Provided is a wind farm control system that allows an entire wind farm to operate efficiently by taking into consideration the influence of slipstream generated in the wind farm. A wind farm control system comprising a plurality of wind power generators disposed on land or on sea is characterized by comprising: a display device to display wind speed data and output data for each wind power generator of the plurality of wind power generators; a combination determining device to calculate combinations of running or stopping each wind power generator in the wind farm by calculating, using the wind speed data, output data, and a prescribed slipstream wind speed evaluation formula, an estimated value for the maximum output of the wind farm when currently running wind power generators are stopped and the maximum output of the wind farm when currently stopped wind power generators are run and comparing the estimated values with the measured values for the wind farm output; and a control device to run or stop each wind power generator in the wind farm on the basis of these combinations.
NºPublicación: EP3158189A1 26/04/2017
MITA-TEKNIK AS [DK]
The present invention relates to a system for dynamic pitch control primarily for wind turbine blades, which system calculates the pitch position of the wind turbine blades independently, which control system performs feedback regulation. The object of the pending patent application is to perform effective pitch regulation and hereby to reduce thrust on the tower and the rotor. This can be achieved if the system performs feed forward regulation of the pitch of the blades, based on the load of the previous blade in substantially the same position. Hereby it can be achieved that the actual load on the previous blade has passed the same position in relation to the wind blowing around the wind turbine. Hereby it can be achieved that measured parameters are used after a short delay to perform a very precise and highly efficient adjustment of the next wind turbine blade passing the same position. The feed forward regulation can be combined with already existing control parameters for pitch control of wind turbine blades.
NºPublicación: EP3158625A1 26/04/2017
VESTAS WIND SYS AS [DK]
The invention relates to a method for repairing an electric generator, preferably in a wind turbine generator (WTG), the electric generator (10) having a stator and a rotor (30) rotatably mounted relative to the stator. The method of repairing the electric generator provides a rotor connecting ring (40) with a first conductor assembly and a second conductor assembly in two different planes, each assembly with a plurality of conductive arc segments. Each of the first and the second plurality of conductive arc segments form a ring-like shape in their respective plane, both ring-like shapes being concentrical to the central shaft (132) when the rotor connecting ring is mounted. First electrical connections (50) from the central shaft connect to the rotor connecting ring for the multiple phases (K,L,M). Second electrical connections (60) further connect from the rotor connecting ring to the respective windings of the multiple phases (K,L,M) on the exterior part of the rotor facing the stator. The rotor connecting ring enhances rotational and thermal stability of the electric generator.
NºPublicación: EP3159655A1 26/04/2017
GEN ELECTRIC [US]
The present application provides a method of inspecting composite turbine blade spar caps during lay-up and a turbine blade profilometry inspection system (280). The method may include the steps of applying a layer (260) to a mold (300), measuring a surface characteristic of the layer (260) with a profilometer (290), and determining if the layer (260) has an out of plane wave (270) therein based on the measured surface characteristic.
NºPublicación: EP3159536A1 26/04/2017
SCHOTTEL HYDRO GMBH [DE]
The invention relates to a turbine with a plurality of blades (1), each of which ex-tends from a blade root (10) via a blade profile (11) to a blade tip (12) and is at-tached with its blade root (10) to a rotatable hub (2) in a connecting region (22) between a hub tip (20) and a hub end (21) of the same, wherein the blade root (10) has a first projection (13) pointing towards the hub tip (20) and a second projection (14) pointing towards the hub end (21), each of which protrudes beyond the blade profile (11), and the hub (2) has corresponding grooves (23, 24) receiving the first and second projections (13, 14) positively.
NºPublicación: EP3158190A1 26/04/2017
MITA-TEKNIK AS [DK]
The present invention relates to a control system for thrust-limiting of wind turbines, which wind turbine comprises at least one tower, which tower carries at least one nacelle which nacelle comprises a rotating shaft, which shaft is rotated by one or more blades, which blades at pitch regulated by a pitch control system. It is the object of the present invention to reduce mechanical load and stress of a wind turbine. A further object is to reduce the maximal load on tower of a wind turbine. The thrust-limiting control system performs control of the pitch angle, which thrust-limiting control system performs regulation of the pitch angle based on at least a first input from a wind estimator and a second input from a turbulence estimator. By thrust-limiting control, reduction in the maximum mechanical load on a tower, or maybe also a nacelle, can be achieved by a relatively high percentage of the load in a way where it has only very limited influence on the power production of the wind turbine.
NºPublicación: US2017107968A1 20/04/2017
GEN ELECTRIC [US]
The present application thus provides a method of inspecting composite turbine blade spar caps during lay up. The method may include the steps of applying a layer to a mold, measuring a surface characteristic of the layer with a profilometer, and determining if the layer has an out of plane wave therein based on the measured surface characteristic.
NºPublicación: WO2017063804A1 20/04/2017
DEIF AS [DK]
Method for control of the torque performance of an electric pitch motor (1). A control system (2) comprises a first unit (3) controlling the pitch angle of the rotor blade, a second unit (7) which compares a reference speed Sr with an actual speed Sa of the motor (1) rotational speed. The second unit (7) controls the motor (1) rotational speed, a third unit (10) which regulates the motor (1). The control system (2) comprises a first overload device (13) and a second overload device (14). The second overload device (14) receives an error-speed signal Se, which is the difference between Sr and Sa recorded by the second unit (7). The second overload unit (14) compares See with a maximum allowable speed value, Smax, and the second overload device (14) sends a signal to the motor (1) for the regulation of the torque performance.
NºPublicación: WO2017064903A1 20/04/2017
NABTESCO CORP [JP]
An assembly (20) of a blade and rotor has a rotor (30) connected to a power generator (12), the rotor (30) transmitting rotational force to the power generator, a blade (40) connected to the rotor, the blade (40) causing the rotor to rotate through force received from a fluid, a bearing (25) for rotatably linking the rotor and the blade together, and a rotational drive device (50) for rotatably driving the blade to control pitch angle. The rotational drive device has an electric motor (52), and a speed reducer (53) for reducing rotation outputted from the electric motor and outputting the reduced rotation from an output unit (50b). At a connecting section where the speed reducer connects with the rotor and/or the blade, an external-force-relieving mechanism is configured for relieving external force occurring in the speed reducer via the connecting section when the blade receives the fluid and tilts.
NºPublicación: WO2017064363A1 20/04/2017
BIGFIELD TMI [FI]
The invention utilizes a ski lift for wind power generation outside of the ski season. The carriers on the ski lift are replaced by wind catching structures (10) that pull the haul rope either uphill or downhill, depending on the prevailing wind. The haul rope rotates the electrical drive motor (20 of the ski lift, causing it to generate electrical energy.
NºPublicación: WO2017065462A1 20/04/2017
CMD CO LTD [KR]
The present invention relates to a buoyant body having an improved restoring force and structural stability, and a marine buoyant floating structure using the same. More particularly, the present invention relates to a buoyant body capable of increasing structural stability and forming a restoring force since buoyant bodies having a high self-weight value capable of forming a center of gravity in a plurality of buoyant pipes are installed at a predetermined interval, whereby the marine buoyant floating structure maintains balance against external forces such as typhoon, wind and waves, and a marine buoyant floating structure using the same.
NºPublicación: US2017110896A1 20/04/2017
KALISAYA LTD [IL]
This invention relates to a portable case including a processor configured to control the portable case; a charging port; at least one output port; an adjustable energy storage system further including a battery printed circuit board (BPCB) including a plurality of battery packs connectors; and a central battery management microprocessor (CBMM); and a plurality of battery packs configured to be connected to the plurality of battery packs connectors and to provide power to electronic appliance connected to the at least one output port; a user interface configured to enable powering and monitoring of the portable case; and a recharging element, carryable by the portable case, the recharging element configured to be connected to the charging port and recharge at least one of the plurality of battery packs.
NºPublicación: US2017110882A1 20/04/2017
THE AES CORP [US]
Approaches for controlling power supplied to an electric grid are disclosed. In embodiments, methods and systems control power supplied to an electric grid using an energy storage device. In an embodiment, a method receives an indication of power to be supplied to the electric grid, generates power from a power generator and adjusts, using the generated power, an energy level of the energy storage device to control power supplied to the grid in accordance with the received indication. In another embodiment, a system comprises a grid indication receiver for receiving an indication of power to be supplied to the electric grid; a power generator connected to the grid; an energy storage device coupled to the power generator; and a controller for adjusting, using the generated power from the generator, an energy level of the energy storage device to control power supplied to the grid in accordance with the received indication.
NºPublicación: US2017107972A1 20/04/2017
UNIV KING FAHD PET & MINERALS [SA]
The vertical wind turbine is provided with a rotating vane housing mounted between an upper, cam disk and a lower, base disk, the base disk being mounted to a shaft. A plurality of turbine blades are pivotally mounted around the vane housing, each of the blades being pivotal between open and closed positions with respect to the housing. The cam disk defines a cam profile. A roller follower is coupled to each turbine blade. The follower forces the connected blade to open or close as the follower travels along the cam profile during each revolution of the housing. The open position of the blade harnesses wind energy to induce torque for rotating the housing. The closed position of the blade reduces drag to increase efficiency of the vertical wind turbine.
NºPublicación: US2017107969A1 20/04/2017
GEN ELECTRIC [US]
Rotor blade assemblies for wind turbines are provided. A rotor blade assembly includes a rotor blade. In some embodiments, the rotor blade assembly further includes a surface feature configured on an exterior surface of the rotor blade, the surface feature having an exterior mounting surface. At least a portion of the exterior mounting surface has a contour in an uninstalled state that is different from a curvature of the exterior surface of the rotor blade at a mount location of the surface feature on the rotor blade. In other embodiments, the rotor blade assembly further includes a seal member surrounding at least a portion of a perimeter of the surface feature. The seal member contacts and provides a transition between the exterior surface and the surface feature.
NºPublicación: US2017107974A1 20/04/2017
X DEV LLC [US]
A method may involve transmitting power between a tethered aerial vehicle equipped with wind turbines for generating power and a ground station configured to interconnect the generated power to an electrical distribution network. The power may be transmitted using high voltage, high frequency AC electrical signals, and transformers at the ground station and the aerial vehicle can scale the AC voltage for use at the respective locations. Converters at the ground station and the aerial vehicle can then convert the transformed voltage to DC. The AC voltage may be transmitted through the tether at a resonant frequency of the tether based in part on an internal capacitance between multiple conductive paths on the tether.
NºPublicación: US2017107973A1 20/04/2017
NORDEX ENERGY GMBH [DE]
A wind turbine having a rotor, which has at least one rotor blade adjustable about its longitudinal axis via a pitch control, and a generator, driven by the rotor, having a speed regulator, which takes a control difference in the rotational speed and generates a control variable for the pitch control, and a generator regulator, which takes a power conductance and determines a rotational speed setpoint and a power setpoint, wherein a pilot control is provided that uses an inverse controlled system to determine a control variable for the pitch control, the inverse controlled system determining a power torque (MP) from the rotational speed setpoint and the power setpoint and also an acceleration torque (MB) from the change in the rotational speed setpoint over time and outputting the control variable for the pitch control as an output variable that provides pilot control for the output variable from the speed regulator.
NºPublicación: US2017107085A1 20/04/2017
AREVA WIND GMBH [DE]
A tool for handling a long and heavy object, in particular a wind turbine rotor blade, includes a clamping unit which can be fixed to the rotor blade. The clamping unit has a first clamp and a second clamp spaced from the first clamp with respect to a longitudinal direction of the object. A first rod unit is rotatably coupled to the first clamp of the clamping unit at a first coupling site is also and coupled to a traverse. A second rod unit is rotatably coupled to the second clamp of the clamping unit at a second coupling site and is also coupled to the traverse via by a rope. A The length of a rope section between the second rod unit and the traverse is adjustable by a winch.
NºPublicación: US2017107975A1 20/04/2017
WIND HARVEST INT INC [US]
Multiple vertical-axis wind-turbines are aligned in a geometric array relative to a horizontal-axis wind-turbine. The vertical-axis wind-turbines are placed in close proximity to the horizontal axis wind turbine. The turbines are in close enough proximity to each other to have an effect on wind conditions that create lift on a turbine blade and turn the rotor of the horizontal axis wind turbine. The wind conditions caused by the vertical axis wind turbines include any of i) a wind wall effect, ii) increased pressure difference between a front side and a back side of the rotor of the horizontal axis wind turbine, and iii) downwind vertical mixing of the air. The vertical-axis wind-turbines and horizontal axis wind turbine are configured to use the wind conditions to convert wind into increases in generated electrical power.
NºPublicación: US2017107977A1 20/04/2017
VESTAS WIND SYS AS [DK]
The invention relates to a method for installation of a power control module in a tower for a wind turbine. The method includes, providing a power control module (101) and providing a tower section (201). According to the invention the following steps are included in the mentioned sequence. a) providing a temporary support device (301), b) placing the power control module (101) on the temporary support device (301), c) placing the tower section (201) around the power control module (101), d) connecting the power control module (101) to the tower section (201), and e) removing the connected power control module (101) and tower section (201) from the temporary support device (301). The invention also relates to an aggregate component for a wind turbine. The component includes a power control module (101) and a tower section (201). The power control module (101) is connected to and supported by the tower section (201) in a state as a pre-fabricated and mobile component. According to the invention the power control module (101) hangs suspended in the tower section (201).
Nº publicación: US2017107976A1 20/04/2017
SIEMENS AG [DE]
A method is provided for determining a deflection of a rotor blade of a wind turbine including the following steps: fixing at least one electrical conductor loop via fixing points to at least one surface of the rotor blade, wherein the at least one electrical conductor loop is arranged such that due to the deflection of the rotor blade an extension of the at least one conductor loop is forced between at least two of the fixing points, the extended electrical conductor loop keeps closed if the deflection of the rotor blade is below the defined threshold, the extended conductor loop opens if the deflection of the rotor blade is beyond the defined threshold. Further an arrangement, a sensor, a rotor blade and a wind turbine are also provided.