Wind Patents (Class 290/44)
  • Patent number: 9843185
    Abstract: A method of optimizing one or more starting parameters of a solar power generator system and a solar power generator system, wherein the solar power generator system includes a solar panel array and a converter for converting power obtained from the panel array. The method can include measuring an output voltage of the panel array, comparing the output voltage with a starting voltage (Vdc), starting the solar power generator system when the output voltage of the panel array exceeds the starting voltage (Vdc), measuring the obtained power from the solar panel array after a morning start, comparing the obtained power with a known limit value, and changing the one or more starting parameters on the basis of the comparison of power.
    Type: Grant
    Filed: October 16, 2013
    Date of Patent: December 12, 2017
    Assignee: ABB Oy
    Inventors: Jari Uusimäki, Jarkko Hyttinen, Janne Hellberg
  • Patent number: 9841006
    Abstract: A wind turbine has a Lidar device to sense wind conditions upstream of the wind turbine. Signals from the wind turbine are processed to detect an extreme change in wind direction. The detection is performed by differentiating the rate of change of wind direction and filtering for a period of time. On detection of extreme change the system controller takes the necessary evasive action which may include shutting down the turbine, commencing an immediate yawing action, and de-rating the turbine until the yawing action is complete.
    Type: Grant
    Filed: December 15, 2011
    Date of Patent: December 12, 2017
    Assignee: VESTAS WIND SYSTEMS A/S
    Inventors: Justin Creaby, Robert Bowyer, Christopher Spruce
  • Patent number: 9841001
    Abstract: A banded turbine configuration has an integral outer band support structure capable of providing two point simple support for a multiplicity of blades. A large scale vertical array has a set of twelve 23 m-diameter banded turbines with up to nine blades and resting on an Open Web Steel Joist (OWSJ) platform. The banded turbine configuration is supported off of a main shaft hub assembly, which is supported by forward and aft pillow block bearing assemblies. The banded turbine allows for a protective screen for bird- and bat-kill prevention. Each banded turbine employs DC alternators to provide a switchable output which is subsequently fed to a dedicated set of high efficiency grid-compatible solid state invertors or, alternatively, to energy storage.
    Type: Grant
    Filed: July 30, 2013
    Date of Patent: December 12, 2017
    Inventor: William R. Richards
  • Patent number: 9843189
    Abstract: A battery energy storage system control system, including: logic coupled to a photovoltaic station and an energy storage system and executing a photovoltaic station capacity firming algorithm operable for making a combined output of the photovoltaic station and the energy storage system substantially constant such that power swings on an associated feeder system are avoided; logic coupled to the photovoltaic station and the energy storage system and executing a voltage support algorithm operable for holding point of common coupling voltage and phase values substantially equal to substation voltage and phase values via power injection or removal; and logic coupled to the photovoltaic station and the energy storage system and executing an energy time shift algorithm operable for storing energy during periods of relatively low demand and providing energy during periods of relatively high demand.
    Type: Grant
    Filed: May 18, 2015
    Date of Patent: December 12, 2017
    Assignees: The University of North Carolina at Charlotte, Duke Energy Corporation
    Inventors: Sukumar Kamalasadan, Sherif Abdelmageed Abdelrazek, Johan H. R. Enslin, Daniel Blair Sowder
  • Patent number: 9836063
    Abstract: Example implementations may relate to selection between a first mode and a second mode. The first mode may involve (i) directing an aerial vehicle (e.g., in an aerial network including a plurality of aerial vehicles) to navigate to each of a plurality of altitudes and (ii) determining respective wind-related data at each respective altitude. Whereas, the second mode may involve (i) selecting at least one altitude based on the determined wind-related data and (ii) directing the aerial vehicle to reposition to the at least one selected altitude. As such, a control system may determine flight data for the aerial vehicle. Based on the flight data, the control system may make a selection between the first mode and the second mode. And based on the selection, the control system may then operate the aerial vehicle according to the first mode or may operate the aerial vehicle according to the second mode.
    Type: Grant
    Filed: December 8, 2015
    Date of Patent: December 5, 2017
    Assignee: X Development LLC
    Inventors: Keith Allen Bonawitz, Johan Mathe
  • Patent number: 9835135
    Abstract: A method for controlling a wind turbine may generally include operating the wind turbine at an initial power output that is greater than a rated power output associated with the wind turbine. The wind turbine may have an anticipated operational life at the rated power output. In addition, the method may include decreasing a power output of the wind turbine over time in order to maintain an actual operating life of the wind turbine substantially equal to or greater than the anticipated operational life. A final power output of the wind turbine at an end of the anticipated operating life may be less than the rated power output.
    Type: Grant
    Filed: October 31, 2013
    Date of Patent: December 5, 2017
    Assignee: GENERAL ELECTRIC COMPANY
    Inventor: Samuel David Draper
  • Patent number: 9835134
    Abstract: A method and corresponding arrangement are provided for determining pitch angle adjustment signals for adjusting a pitch angle of a rotor blade connected to a rotation shaft of a wind turbine. The method includes obtaining a first maximal speed signal indicative of a first desired maximal rotational speed of the rotation shaft. The method also includes deriving a first pitch angle adjustment signal based on the first maximal speed signal. The method further includes obtaining a second maximal speed signal indicative of a second desired maximal rotational speed of the rotation shaft different from the first desired maximal rotational speed of the rotation shaft. Further, the method includes deriving a second pitch angle adjustment signal based on the second maximal speed signal. The second pitch angle adjustment signal is different from the first pitch angle adjustment signal.
    Type: Grant
    Filed: April 18, 2012
    Date of Patent: December 5, 2017
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Thomas Esbensen, Gustav Hoegh
  • Patent number: 9829254
    Abstract: An installation for storing thermal energy is provided. The storage is carried out by the compression and relaxation of a working gas, wherein pump and compressor can be driven by, for example, electric motors which temporarily absorb excess power generated in the power grid. The generated thermal energy is temporarily stored in a cold accumulator and a heat accumulator. According to the invention, a vapor circuit is provided to connect to the heat accumulator and the cold accumulator for discharging the installation, by which a turbine for generating electrical energy can be driven by a generator. Said circuit is implemented by means of another conduit system distinct from the circuit for charging the installation. Advantageously, thermal energy generated from overcapacities in the power grid can thus be reconverted with high yield into electrical energy via a vapor circuit.
    Type: Grant
    Filed: September 24, 2012
    Date of Patent: November 28, 2017
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Daniel Reznik, Henrik Stiesdal
  • Patent number: 9828968
    Abstract: The device, herein to be known as the HydroQueen, is a device to convert the kinetic energy of a fluid into electrical energy using a single or multiple helix shaped vertical paddles. The helix shaped vertical paddle rotates around its axis from the force placed on face of paddle by the movement of the fluid. The electricity is generated by the rotation of the paddle around its axis. The number, length, radii, and pitch of the paddles may vary depending on the location and/or application.
    Type: Grant
    Filed: November 3, 2015
    Date of Patent: November 28, 2017
    Inventor: Dorraine Marie Rooney
  • Patent number: 9822763
    Abstract: A wind turbine has a Lidar device to sense wind conditions upstream of the wind turbine. Wind speed signals from the wind turbine are processed to detect an extreme operating gust. The detection is performed by differentiating the axial wind velocity and filtering for a period of time. On detection of extreme operating gust the system controller takes necessary evasive action which may include shutting down the turbine or varying the blade pitch angle.
    Type: Grant
    Filed: May 3, 2012
    Date of Patent: November 21, 2017
    Assignee: VESTAS WIND SYSTEMS A/S
    Inventors: Chris Spruce, Christopher Palmer, Robert Bowyer
  • Patent number: 9822764
    Abstract: An automatic adjustment system for a variable-speed wind turbine is provided, having a power vector generator for generating a power vector (Pvec) of wind turbine output power; a mapping unit for establishing relationships (?vec, ?vec) between wind turbine output power and rotational speed and pitch angle on the basis of the power vector (Pvec) and an operational trajectory of the wind turbine; a wind speed estimator for estimating a wind speed (vest); an available power calculator for calculating the available power (Pest) of the wind turbine on the basis of the estimated wind speed (vest) and the established relationships (?vec, ?vec). A method of performing automatic analysis of a wind turbine configuration, a computer program product for carrying out the steps of such a method, and a wind turbine having such an automatic adjustment system are also provided.
    Type: Grant
    Filed: October 5, 2014
    Date of Patent: November 21, 2017
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Thomas Esbensen, Ramakrishnan Krishna, Frank Scheurich, Michael Stoettrup
  • Patent number: 9825568
    Abstract: A drive system has: a three-phase motor, having: a shaft, a first three-phase winding set, having: a three-phase stator winding for connection to a three-phase alternating voltage network and a three-phase rotor winding, which is coupled to the shaft in a mechanical, rotationally fixed manner, a second three-phase winding set, having: a three-phase stator winding for connection to the three-phase alternating voltage network in such a manner that rotary field is produced that runs in the opposite direction to a rotary field that is produced by the stator winding of the first winding set.
    Type: Grant
    Filed: May 8, 2014
    Date of Patent: November 21, 2017
    Assignee: Lenze Drives GmbH
    Inventor: Andreas Tolksdorf
  • Patent number: 9825573
    Abstract: A device for ripple controlling an alternator includes an alternator including a rotor and a stator, a detector for detecting a rotation position of the rotor, and a controller for controlling the alternator to generate a toque ripple with an opposite phase to a rotation of a crankshaft of an engine.
    Type: Grant
    Filed: October 22, 2015
    Date of Patent: November 21, 2017
    Assignee: HYUNDAI MOTOR COMPANY
    Inventor: Byung Hwan Jung
  • Patent number: 9816484
    Abstract: The invention relates to a safety system for a wind turbine, comprising a pitch system (23), which comprises a plurality of drive systems (15, 16, 17) and at least one safety switching device (24), by means of which each of the drive systems (15, 16, 17) can be controlled to carry out a travel to a safe position in accordance with at least one control signal, a safety circuit, which is provided in a machine part adjacent to the pitch system (23) and which comprises a transmission device (32) and a controller (29), by means of which the at least one control signal can be generated, which can be transmitted from the controller (29) to the safety switching device (24) by means of the transmission device (32), wherein the control signal can be generated and/or output by the controller (29) in the form of at least two control signals (EFC 1, EFC 2), the control signals (EFC 1, EFC 2) can be transmitted from the controller (29) to the safety switching device (24) by means of the transmission device (32), a safety-r
    Type: Grant
    Filed: June 3, 2013
    Date of Patent: November 14, 2017
    Assignee: SSB Wind Systems GmbH & Co. KG
    Inventors: Christof Rickeshenrich, Jan De Veen, Dirk Klein, Ronald Horstjan
  • Patent number: 9812859
    Abstract: Distributed maximum power point tracking systems, structures, and processes are provided for power generation structures, such as for but not limited to a solar panel arrays. In an exemplary solar panel string structure, distributed maximum power point tracking (DMPPT) modules are provided, such as integrated into or retrofitted for each solar panel. The DMPPT modules provide panel level control for startup, operation, monitoring, and shutdown, and further provide flexible design and operation for strings of multiple panels. The strings are typically linked in parallel to a combiner box, and then toward and enhanced inverter module, which is typically connected to a power grid. Enhanced inverters are controllable either locally or remotely, wherein system status is readily determined, and operation of one or more sections of the system are readily controlled. The system provides increased operation time, and increased power production and efficiency, over a wide range of operating conditions.
    Type: Grant
    Filed: April 19, 2013
    Date of Patent: November 7, 2017
    Assignee: Solaredge Technologies Ltd.
    Inventors: Argil E. Shaver, II, Ronald M. Newdoll
  • Patent number: 9804625
    Abstract: Systems, methods, and messages of the present invention provides IP-based messages associated with the grid elements, wherein each IP-based message includes an internet protocol (IP) packet that is generated autonomously and/or automatically by the grid elements, intelligent messaging hardware associated with the grid elements, at least one coordinator, and/or a server associated with the electric power grid and its operation, energy settlement, and/or financial settlement for electricity provided or consumed, transmitted, and/or curtailed or reduced. The IP packet preferably includes a content including raw data and/or transformed data, a priority associated with the IP-based message, a security associated with the IP packet, and/or a transport route for communicating the IP-based message via the network.
    Type: Grant
    Filed: January 30, 2015
    Date of Patent: October 31, 2017
    Assignee: CAUSAM ENERGY, INC.
    Inventor: Joseph W. Forbes, Jr.
  • Patent number: 9803624
    Abstract: A wind compressor system having one or more wind turbines and a plurality of wind compressors located proximate the one or more wind turbines. The wind compressors optimize the energy created by the wind turbines by redirecting and converging the wind from the wind compressor to the wind turbines. Each of the wind compressors comprises an obstruction having a size and shape adapted to converge the wind currents by means of a Venturi effect toward the one or more turbines thereby increasing the velocity and force of the wind hitting the wind turbine. A plurality of transporters coupled to the wind compressors. The transporters configured to move at least one wind compressors to a location that maximizes the force of the wind encountered by the turbine.
    Type: Grant
    Filed: August 9, 2016
    Date of Patent: October 31, 2017
    Inventor: Edward Mazur
  • Patent number: 9800122
    Abstract: A method for handling a bearingless machine into a driveline includes coaxially aligning a rotor subassembly and a stator subassembly such that first and second circumferential track portions define a substantially complete first circumferential track in communication with a first portal. A first fixture band is inserted into the first circumferential track via the first portal to substantially maintain axial and radial alignment of the rotor subassembly relative to the stator subassembly.
    Type: Grant
    Filed: November 6, 2013
    Date of Patent: October 24, 2017
    Assignee: Hamilton Sundstrand Corporation
    Inventor: Richard A. Himmelmann
  • Patent number: 9797374
    Abstract: An upwind wind turbine comprising a tower and a rotor is described. The wind turbine additionally includes a pressure-sensing device supported by the tower at a location within the wake of the rotor. The pressure-sensing device is configured to sense air pressure and provide a signal indicative of the sensed air pressure to a wind turbine controller for use in controlling the rotor of the wind turbine.
    Type: Grant
    Filed: July 26, 2011
    Date of Patent: October 24, 2017
    Assignee: VESTAS WIND SYSTEMS A/S
    Inventor: Jens Jakob Wedel-Heinen
  • Patent number: 9797380
    Abstract: Systems and methods for generating electricity using solar panels to power compressor fans that force air into a nacelle that turns a spiral turbine. The turbine is connected to a gearing system that is connected to a generator. The generator is connected to a master control unit and a transformer. The master control unit decides whether to store the electricity in batteries, power the compressor fans or send the surplus electricity to the grid. The horizontal or vertical embodiments of the invention do not require a tower or the long blades connected to a hub.
    Type: Grant
    Filed: March 18, 2015
    Date of Patent: October 24, 2017
    Inventor: Bob Burkett
  • Patent number: 9797383
    Abstract: A wind turbine having one or more magnets for reducing friction between the turbine support and a turbine rotor. The reduction of friction between the turbine rotor and the turbine support allows for an increase in energy production and scale of the wind turbines. The magnet configuration employs a ring of cylindrically-shaped magnets at the bottom and opposed by a corresponding number of generally rectangular-shaped magnets. Bearing magnets are also employed for axial stabilization.
    Type: Grant
    Filed: July 11, 2016
    Date of Patent: October 24, 2017
    Assignee: Hover Energy, LLC
    Inventors: Cheong S. Choi, Anthony Michael Jenkins
  • Patent number: 9800198
    Abstract: An automatic intelligent hybrid electricity generating device designed to get maximum electrical energy from renewable energy resources i.e., wind and sunlight and works intelligently and moves automatically to get maximum available energy resources i.e., sunlight or wind, thereby eliminating separate installation of solar panels and wind turbine and increases efficiency.
    Type: Grant
    Filed: May 23, 2014
    Date of Patent: October 24, 2017
    Inventor: Rizwan Shoukat
  • Patent number: 9797377
    Abstract: The present disclosure is directed to a system and method for controlling a wind farm. The method includes operating the wind farm based on multiple control settings over a plurality of time intervals. A next step includes collecting one or more wind parameters of the wind farm over the plurality of time intervals and one or more operating data points for each of the wind turbines in the wind farm for the plurality time intervals. The method also includes calculating a contribution of the operating data points for each of the wind turbines as a function of the one or more wind parameters. Further steps of the method include estimating an energy production for the wind farm for each of the control settings based at least in part on the contribution of the operating data points and controlling the wind farm based on optimal control settings.
    Type: Grant
    Filed: April 27, 2015
    Date of Patent: October 24, 2017
    Assignee: GENERAL ELECTRIC COMPANY
    Inventors: Nitika Bhaskar, Akshay Ambekar Krishnamurty
  • Patent number: 9790924
    Abstract: The invention is a method for controlling and/or monitoring a wind turbine 1 equipped with a LIDAR sensor 2. Control and/or monitoring provides an estimation of the wind speed at the rotor obtained an estimator and a LIDAR sensor 2. The estimator of the wind speed at the rotor is constructed from a representation of the wind, a model of the LIDAR sensor and a model of wind propagation.
    Type: Grant
    Filed: November 25, 2014
    Date of Patent: October 17, 2017
    Assignee: IFP ENERGIES NOUVELLES
    Inventors: Benoit Bayon, Jonathan Chauvin
  • Patent number: 9790916
    Abstract: Wind turbine comprising a hub carrying a plurality of blades, the hub being rotatably mounted on a frame, the frame extending forward into the hub, wherein the frame comprises a manhole arranged in an upper side of the portion of the frame extending forward into the hub and the frame being dimensioned such that an average-size adult human can move around through it at least up to the manhole.
    Type: Grant
    Filed: March 30, 2012
    Date of Patent: October 17, 2017
    Assignee: ALSTOM Renewable Technologies
    Inventor: Sebastian Valero Lafuente
  • Patent number: 9790921
    Abstract: A method for adjusting a power parameter of a wind turbine is disclosed. The method includes determining a load parameter indicative of a mechanical load of the wind turbine; estimating a turbulence of a wind speed based on the determined load parameter; and adjusting the power parameter relating to a power of the wind turbine based on the estimated turbulence. A system for adjusting a power parameter of a wind turbine is also described.
    Type: Grant
    Filed: September 29, 2011
    Date of Patent: October 17, 2017
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Per Egedal, Rune Rubak
  • Patent number: 9784241
    Abstract: A wind turbine includes a rotor, a plurality of rotor blades coupled to the rotor, and a blade pitch control system coupled to each rotor blade. A computer-implemented method for controlling the wind turbine includes determining at least one pitch position for a first blade. The method also includes determining whether there is a malfunction of the blade pitch control system associated with the first blade. The method further includes predicting a rotor imbalance using a model of at least a portion of the wind turbine. The method also includes comparing the predicted rotor imbalance with a predetermined threshold value. The method further includes one of regulating the pitch position for the second blade such that the predicted rotor imbalance is restored to a value below the predetermined threshold and regulating a pitch position for a second blade such that the predicted rotor imbalance does not exceed the predetermined threshold.
    Type: Grant
    Filed: August 25, 2014
    Date of Patent: October 10, 2017
    Assignee: General Electric Company
    Inventors: Rogier Sebastiaan Blom, Matthijs Leonardus Gerardus Boerlage, Nora Cheng-Huei Han
  • Patent number: 9788086
    Abstract: A measurement system comprises a measurement unit, a transmitter, an autarkic power unit and a control unit. The measurement unit measures a quantity repeatedly and the transmitter connects the measurement system to a network and transmits data to the network based on the measurements of the measurement unit. Further, the autarkic power unit supplies electrical energy to the measurement unit, the transmitter and the control unit. Additionally, the control unit controls the measurement of the quantity and the transmission of data dynamically based on a currently available amount of energy provided by the power unit. Further, the control unit stops measurements by the measurement unit and keeps the transmitter connected to the network, if the currently available amount of energy is below a predefined energy limit indicating that the currently available amount of energy is too low for taking measurements and for keeping connected to the network.
    Type: Grant
    Filed: January 11, 2013
    Date of Patent: October 10, 2017
    Assignee: AKTIEBOLAGET SKF
    Inventors: Gerard McGoogan, Frank Bartl, Joseph Erskine, Andreas Clemens Van Der Ham
  • Patent number: 9787235
    Abstract: A method for operating a generator for an internal combustion engine of a vehicle having a starting operating mode and a start-stop operating mode, a torque of the generator being delimited in the starting operating mode, including: detecting an operating mode of the vehicle, and deactivating a delimitation of the torque of the generator if the detected operating mode corresponds to the start-stop operating mode.
    Type: Grant
    Filed: February 9, 2012
    Date of Patent: October 10, 2017
    Assignee: ROBERT BOSCH GMBH
    Inventors: Arnold Engber, Thomas Koss
  • Patent number: 9780709
    Abstract: The present disclosure is directed to a system and method for optimizing operation of a wind turbine. The method includes providing a voltage regulator between a power grid and the wind turbine. The voltage regulator is configured to control at least one voltage condition of the wind turbine. Another step includes monitoring, via one or more sensors, at least one operating condition and at least one voltage condition of the wind turbine. The method also includes comparing, via a controller, at least one of the operating condition or the voltage condition with a predetermined threshold to determine a margin-to-threshold ratio. Thus, a further step includes controlling the voltage regulator based on the comparison so as to maximize the margin-to-threshold ratio.
    Type: Grant
    Filed: September 3, 2014
    Date of Patent: October 3, 2017
    Assignee: General Electric Company
    Inventors: Edward Wayne Hardwicke, Jr., Cornelius Edward Holliday, Rajni Kant Burra
  • Patent number: 9780710
    Abstract: Wind farms and methods for operating wind farms are provided. A wind farm includes a plurality of wind turbine generators. A method includes determining an available reactive power value for each of the plurality of wind turbine generators. The method further includes distributing an individual reactive power command to each of the plurality of wind turbine generators. The individual reactive power command is individually tailored to each wind turbine generator of the plurality of wind turbine generators based on the available reactive power value for that wind turbine generator.
    Type: Grant
    Filed: April 15, 2014
    Date of Patent: October 3, 2017
    Assignee: GENERAL ELECTRIC COMPANY
    Inventors: Raymond Francis Rose, Jr., Enno Ubben
  • Patent number: 9772859
    Abstract: A wake-up judgment apparatus for a generator includes a current sensing element and an electric charge processing element. A first terminal of the current sensing element is electrically connected to a power conversion circuit, and a second terminal thereof is electrically connected to an auxiliary micro power. The power conversion circuit provides power conversion and power transmission between the generator and a load, and the power conversion circuit is electrically connected to a main supply power. A first terminal of the electric charge processing element is electrically connected to a third terminal of the current sensing element, and a second terminal thereof is electrically connected to the auxiliary micro power, and a third terminal thereof is electrically connected to a microprocessor to output a wake-up signal to the microprocessor.
    Type: Grant
    Filed: November 28, 2014
    Date of Patent: September 26, 2017
    Assignee: DELTA ELECTRONICS, INC.
    Inventor: Chih-Hung Hsiao
  • Patent number: 9771923
    Abstract: A hub assembly permits a rotor portion of a horizontal axis, fluid-driven turbine (e.g., with three or more blades) to teeter relative to a hub shaft. An outer hub member configured to receive turbine blades is permitted to rotate relative to the inner hub member. Multiple rocker members interposed between the inner hub member and the outer hub member include curved end surfaces that are configured to permit pivotal movement between the rocker members and corresponding features protruding from a hub shaft of the inner hub member. Torque receiving surfaces associated with features protruding from the hub shaft are permitted to slide relative to torque transmitting surfaces of the rocker members.
    Type: Grant
    Filed: December 30, 2016
    Date of Patent: September 26, 2017
    Inventor: Arnold Ramsland
  • Patent number: 9770990
    Abstract: An energy generating and storage system used with an electric vehicle, having batteries, and at least one accumulator charging means connected to the batteries. The accumulator charger includes at least one alternator or generator and air induction turbines. Each air induction turbine includes a free-wheeling member in induction communication with the alternator or generator. Rotation of the free-wheeling members results in rotation of a rotating member in communication with the alternator or generator for producing electrical energy. The air induction turbines are preferably mounted at a front-end location of the vehicle, such as the vehicle's front grill. Air flowing through the free-wheeling members results in rotation of the free-wheeling members and production of the electric energy supplied to the vehicle's motor.
    Type: Grant
    Filed: April 23, 2015
    Date of Patent: September 26, 2017
    Inventor: Billy G. Guthrie
  • Patent number: 9768706
    Abstract: A wind power converter device is provided. The wind power converter device includes grid side converters, generator side converters and a DC bus module. Each of the grid side converters includes grid side outputs electrically coupled to a grid and a first and a second DC inputs. Each two of the neighboring grid side converters are connected in series at the second and the first DC inputs. Each of the generator side converters includes generator side inputs electrically coupled to a generator device and a first and a second DC outputs. Each two of the neighboring generator side converters are coupled in series at the second and the first DC outputs. The DC bus module is electrically coupled between the grid side converters and the generator side converters.
    Type: Grant
    Filed: July 9, 2015
    Date of Patent: September 19, 2017
    Assignee: DELTA ELECTRONICS, INC.
    Inventors: Chang-Yong Wang, Li Cai, Yan-Song Lu
  • Patent number: 9768642
    Abstract: According to aspects of embodiments of the present invention, an auxiliary power system includes: a plurality of storage batteries having different charge/discharge characteristics; a receiving unit configured to externally receive a value for instructing to charge/discharge power for charging/discharging the plurality of storage batteries; and a control unit configured to calculate an indicator value indicating a spread degree of distribution of the value for instructing to charge/discharge power and to change one or more of the storage batteries to be charged/discharged from the plurality of storage batteries according to the indicator value.
    Type: Grant
    Filed: August 31, 2015
    Date of Patent: September 19, 2017
    Assignee: Samsung SDI Co., Ltd.
    Inventor: Yukihiro Shimizu
  • Patent number: 9762138
    Abstract: A power conversion device converts three-phase AC power into DC power by two-arm PWM modulation control and includes a main circuit that is constituted by a plurality of switching elements that are bridge-connected therein; a voltage-command generation unit that generates a voltage command value for the main circuit; a current detection unit that detects at least one of output currents of the main circuit; a power-factor calculation unit that calculates a power factor on the basis of the output current and the voltage command value; a carrier-signal generation unit that generates a carrier signal of a frequency corresponding to the power factor; and a PWM-signal generation unit 6 that compares the voltage command value and the carrier signal to generate a PWM signal that executes switching control on the switching elements.
    Type: Grant
    Filed: December 30, 2016
    Date of Patent: September 12, 2017
    Assignee: Mitsubishi Electric Corporation
    Inventor: Satoshi Taira
  • Patent number: 9762129
    Abstract: A power converter controller includes a primary controller coupled to operate in a first mode to control a power switch with a primary switching pattern. A secondary controller is galvanically isolated from the primary controller. The secondary controller is coupled to initiate a transition operation with the primary controller to take control of the power switch with one or more control signals through a communication link. The primary controller is coupled to acknowledge receipt of the one or more control signals to the secondary controller and transition from the first mode to a second mode.
    Type: Grant
    Filed: August 27, 2015
    Date of Patent: September 12, 2017
    Assignee: Power Integrations, Inc.
    Inventors: Balu Balakrishnan, Alex B. Djenguerian, Sheng Liu
  • Patent number: 9758043
    Abstract: A method for operating an energy supply unit for a motor vehicle electrical system, including at least one first subsystem and one second subsystem having different voltage levels, the energy supply unit including an electric machine which is connected via a converter circuit to the first subsystem and the second subsystem. In a first operating mode, a switchable switch element of the converter circuit which connects the converter circuit to the second subsystem is opened, the converter circuit is activated as an inverter circuit and the electric machine is motor or generator operated. In a second operating mode, the switchable switch element of the converter circuit is closed, the converter circuit is activated as a DC-DC converter and the DC-DC conversion takes place between the voltage levels of the first and the second subsystem.
    Type: Grant
    Filed: March 28, 2014
    Date of Patent: September 12, 2017
    Assignee: ROBERT BOSCH GMBH
    Inventor: Sebastian Jansen
  • Patent number: 9753067
    Abstract: A method and an apparatus for determining a phase and a frequency of an electric quantity being associated with an operation of an electrical device are described. The method comprises extracting a fundamental component of the electric quantity, calculating a positive sequence component of the electric quantity based on the extracted fundamental component, and determining the phase and the frequency of the electric quantity based on the calculated positive sequence component.
    Type: Grant
    Filed: February 1, 2013
    Date of Patent: September 5, 2017
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventor: Heng Deng
  • Patent number: 9753050
    Abstract: The application relates to a wind turbine component having an optical fiber sensor arranged to detect wind speed over the surface of the component. In one embodiment, the optical fiber sensor has a light loss portion that allows some of the light transmitted through the optical fiber to escape. The amount that the optical fiber bends in the air flow across the surface causes the effective surface area of the light loss portion to increase or decrease. With increased or decreased surface area of the light loss portion, more or less light is lost from the fiber. The intensity of the light transmitted in the fiber can therefore be used as a measure of the amount of bending, and therefore as a measure of the air flow's speed. In other embodiments, the optical fiber includes optical gratings, such as Fiber Bragg Gratings.
    Type: Grant
    Filed: February 15, 2013
    Date of Patent: September 5, 2017
    Assignee: VESTAS WIND SYSTEMS A/S
    Inventors: Chee Kang Lim, Jia Liang Ang
  • Patent number: 9752561
    Abstract: A method for detecting a rotor blade pitch angle adjustment fault of a rotor blade of a wind turbine is provided, the method includes measuring a rotor blade pitch angle speed; predicting, based on an actual rotor speed, a rotor blade pitch angle speed; indicating a fault, if a first criterion is satisfied, wherein the first criterion is satisfied, if deviation between the measured rotor blade pitch angle speed and the predicted rotor blade pitch angle speed exceeds a speed threshold.
    Type: Grant
    Filed: December 5, 2014
    Date of Patent: September 5, 2017
    Assignee: Siemens Aktiengesellschaft
    Inventors: Per Egedal, Gustav Hoegh, Bjarne Skovmose Kallesoee
  • Patent number: 9745957
    Abstract: The present subject matter is directed to a method for initializing a startup sequence of a wind turbine. The method includes a step of defining a plurality of operating conditions of the wind turbine. As such, upon satisfaction of the plurality of operating conditions, a run-ready signal may be generated, wherein the run-ready signal indicates a readiness of a power converter of the wind turbine to generate power. The method may also include defining a subset of the plurality of operating conditions, wherein the subset of operating conditions are independent of speed conditions of the wind turbine. Another step of the method includes generating a spin-ready signal for the wind turbine upon satisfaction of the subset of operating conditions. The method may also include controlling a rotor of the wind turbine based at least in part on the spin-ready signal.
    Type: Grant
    Filed: March 10, 2014
    Date of Patent: August 29, 2017
    Assignee: General Electric Company
    Inventors: Robert Allen Seymour, Anthony Michael Klodowski, David Smith, Igor Berroteran Gil, Werner Gerhard Barton
  • Patent number: 9739265
    Abstract: Method of operating a wind turbine comprising a plurality of blades rotatable along their longitudinal axes using a pitch mechanism, and comprising one or more movable trailing edge surfaces. The method includes predicting, at a first moment in time, a high load for one or more of the blades at a second moment in time. The method further comprises actuating on one or more of the movable trailing edge surfaces of these blades such that the trailing edge surfaces have a wider range of control to counteract the predicted high loads before the second moment in time, and simultaneously pitching the blades such as not to negatively affect the operation of the wind turbine. The method furthermore comprises, at the second moment in time, actuating the one or more movable trailing edge surfaces of the at least one or more blades to counteract the high loads.
    Type: Grant
    Filed: February 28, 2013
    Date of Patent: August 22, 2017
    Assignee: ALSTOM Renewable Technologies
    Inventor: Jaume Betran Palomas
  • Patent number: 9739254
    Abstract: An underwater structure includes a power generation unit, which includes a main body, a mounting portion which extends from the main body and which defines a mounting axis, and a support structure adapted for engagement with a bed of a body of water, and support housing. The mounting portion defines a substantially continuous mounting surface which extends substantially completely around the mounting portion, and the support housing defines a substantially continuous support surface which extends substantially completely around the support housing. The mounting surface and support surface are arranged to abut one another substantially continuously when the power generation unit is mounted on the support structure. The mounting portion and the support housing are adapted to cooperate with one another for mounting of the power generation unit on the support structure in any polar orientation about the mounting axis.
    Type: Grant
    Filed: December 19, 2012
    Date of Patent: August 22, 2017
    Assignee: Tidal Generation Limited
    Inventor: Paul Vigars
  • Patent number: 9739262
    Abstract: A static testing and calibrating method for PID link of control system of wind turbine includes following steps. A PID control link of the PID link of the control system of wind turbine is tested. A PID regulator response characteristics is tested. The PID link of control system is calibrated by applying test results of the PID control link and the PID regulation response characteristics.
    Type: Grant
    Filed: December 10, 2014
    Date of Patent: August 22, 2017
    Inventors: Ning-Bo Wang, Shi-Yuan Zhou, Kun Ding, Liang Lu, Jin Li, Jin-Ping Zhang, Shi-En He, Yan-Hong Ma, Ding-Mei Wang, Rong Huang
  • Patent number: 9739261
    Abstract: Disclosed is a power generation device (1), comprising a shaft column (11) and at least two blade units (12-17), wherein the blade units (12-17) are sheathed onto the shaft column (11) and capable of rotating around the shaft column (11), the adjacent blade units rotate in opposite rotational directions, each blade unit (12-17) has a plurality of arm portions (121-171) and a plurality of movable blades (122-172), the arm portions (121-171) extend radially outwardly from the shaft column (11), each of the movable blades is connected to one side of the corresponding arm portion and, after passing through a first radial center line (19) of the shaft column (11), expands gradually, and after being expanded, does not interfere with the adjacent blade unit, the first radial center line (19) is parallel to a fluid flow direction, and each of the movable blades is gradually closed after it rotates through a rotation angle.
    Type: Grant
    Filed: November 23, 2012
    Date of Patent: August 22, 2017
    Inventor: Sheng-Chu Tai
  • Patent number: 9735581
    Abstract: According to one aspect of the teachings herein, various feeder connection arrangements and architectures are disclosed, for collecting electricity from wind turbines in an offshore collection grid that operates at a fixed low frequency, e.g., at one third of the targeted utility grid frequency. Embodiments herein detail various feeder arrangements, such as the use of parallel feeder connections and cluster-based feeder arrangements where a centralized substation includes a common step-up transformer for outputting electricity at a stepped-up voltage, for low-frequency transmission to onshore equipment. Further aspects relate to advantageous generation arrangements, e.g., tower-based arrangements, for converting wind power into electrical power using, for example, medium-speed or high-speed gearboxes driving generators having a rated electrical frequency for full-power output in a range from about 50 Hz to about 150 Hz, with subsequent conversion to the fixed low frequency for off-shore collection.
    Type: Grant
    Filed: April 15, 2014
    Date of Patent: August 15, 2017
    Assignee: ABB Schweiz AG
    Inventors: Jiuping Pan, Debrup Das, Xiaoming Feng
  • Patent number: 9735711
    Abstract: Improving wind-based piezoelectric power conversion is provided. For example, a piezoelectric element affixed to a vibratory member is provided. A rigid mounting system coupled with a rotatable base is provided for said vibratory member on one end of the vibratory member. A solar generator is coupled with the rigid mounting system and at least one obstacle is provided located on the flexing side of the vibratory member. The obstacle induces a vortex in the wind passing the obstacle and arriving at the vibratory member, which enhances wind-induced displacement in the vibratory member.
    Type: Grant
    Filed: June 30, 2014
    Date of Patent: August 15, 2017
    Inventors: Arjun Balasingam, James M. Janky
  • Patent number: 9732730
    Abstract: The present invention relates a wind turbine comprising a wind turbine tower with a nacelle provided on the top to which a rotor hub with one or more wind turbine blades is rotatably mounted so that they form a rotor plane. A floating foundation having a upper section is mounted to the bottom of the wind turbine tower, wherein the foundation has a buoyant body configured to be installed at an offshore position having a water depth of about 40 m or more. The wind turbine blade comprises an inner blade section coupled to an outer blade section by a pitch junction in which a pitch mechanism is coupled to a pitch control system configured to regulate the pitch of the outer blade section relative to the inner blade section at wind speeds above a first wind speed. This allows the pitching to be used to counteract the tilting of the wind turbine caused by the different thrusts acting on the structure.
    Type: Grant
    Filed: January 7, 2014
    Date of Patent: August 15, 2017
    Assignee: Envision Energy (Denmark) ApS
    Inventors: Michael Friedrich, Anders Varming Rebsdorf