Wind Patents (Class 290/44)
  • Patent number: 10041469
    Abstract: A method of maintaining a power generating apparatus includes a separation step of separating a mooring line and a cable from a floating body of a first floating-body type wind turbine power generating apparatus including a maintenance-target section; a retention step of retaining the mooring line and the cable by a floating-body structure, after the separation step; a first transfer step of transferring the first floating-body type wind turbine power generating apparatus from the mooring position, after the separation step; a second transfer step of transferring a second floating-body type wind turbine power generating apparatus having no maintenance-target section to the mooring position; and a connection step of detaching the mooring line and the cable from the floating-body structure and connecting the mooring line and the cable to the second floating-body type wind turbine power generating apparatus, after the second transfer step.
    Type: Grant
    Filed: January 21, 2013
    Date of Patent: August 7, 2018
    Assignee: MHI VESTAS OFFSHORE WIND A/S
    Inventor: Jun Hashimoto
  • Patent number: 10044249
    Abstract: The present invention relates to a rotary electric machine formed by a stator assembly and a rotor assembly arranged such that they rotate relatively with respect to one another, the stator assembly comprising at least a first stator and a second stator, and the rotor assembly comprising at least a first rotor and a second rotor, the first stator, the first rotor, the second stator and the second rotor being arranged consecutively in a coaxial distribution.
    Type: Grant
    Filed: August 25, 2016
    Date of Patent: August 7, 2018
    Inventor: Santiago Camorera Gangoiti
  • Patent number: 10030631
    Abstract: The present invention relates to methods and apparatus for removing or substantially reducing negative damping effects on a floating wind turbine. An operating point signal is received and a gain scheduling parameter is determined based on the received operating point signal. An input signal is then gain scheduled by the gain scheduling parameter and based on at least the gain scheduled input signal the negative damping effects on a floating wind turbine can be removed or substantially reduced.
    Type: Grant
    Filed: May 28, 2014
    Date of Patent: July 24, 2018
    Assignee: VESTAS WIND SYSTEMS A/S
    Inventors: Ian Couchman, Robert Bowyer
  • Patent number: 10024303
    Abstract: A method of controlling a floating-body wind turbine power generating apparatus including a wind turbine generator disposed on a floating body includes a pitch-angle increasing step of increasing a pitch angle of a blade of the wind turbine generator when the wind turbine generator is stopped, so that an aerodynamic braking force is applied to a rotor of the wind turbine generator. In the pitch-angle increasing step, a first change rate of the pitch angle of the blade in a first period during which the wind turbine generator is in an inclining motion toward an upwind side from a vertical direction due to sway of the floating body, is smaller than a second change rate of the pitch angle of the blade in a second period during which the wind turbine generator is in an inclining motion toward a downwind side from the vertical direction due to the sway of the floating body.
    Type: Grant
    Filed: December 27, 2012
    Date of Patent: July 17, 2018
    Assignee: MHI VESTAS OFFSHORE WIND A/S
    Inventors: Tsuyoshi Wakasa, Satoshi Iwasaki, Yukio Yamashita, Yoshiyuki Hayashi
  • Patent number: 10024302
    Abstract: A vertical axis wind turbine formed from an arrangement of fixed stator blades to provide fluid flow acceleration into an arrangement of rotatable blades secured to a generator for invoking electrical power generation. The stator blades are maintained in position by use of a stator plate. Rotor blades are coupled to the generator. The amount of stator and rotor blades may be scaled in number and size depending upon the type of generator to be driven and associated mechanical energy to be obtained. The stator blades are designed for air deflection in a direction for optimal rotor blade rotation by accelerating air flow into a pre-swirl before the flow contacts the rotor blades. Each stator blade is oriented at a sufficient stagger angle so that an angle of the relative velocity does not exceed the stall angle of said rotor blade.
    Type: Grant
    Filed: March 14, 2016
    Date of Patent: July 17, 2018
    Assignee: Vortexis Energy Solutions, Inc.
    Inventors: Gecheng Zha, Bertrand Dano
  • Patent number: 10024305
    Abstract: The present disclosure is directed to a system and method for stabilizing disconnection of one or more wind turbines in a wind farm connected to a power grid during one or more grid contingency events. The method includes determining, via one or more processors, a phase-locked loop error signal for each of the wind turbines based on sensor signals from the plurality of wind turbines. The method also includes comparing the phase-locked loop error signal of each wind turbine to at least one predetermined threshold for a predetermined time period.
    Type: Grant
    Filed: November 10, 2015
    Date of Patent: July 17, 2018
    Assignee: General Electric Company
    Inventors: Alfredo Sebastian Achilles, Einar Vaughn Larsen
  • Patent number: 10027123
    Abstract: In order to control a plurality of inverters, which are connected on their input side to a current source each and on their output side to a common grid connection point, electrical variables are measured at the individual inverters and are used for controlling the individual inverters, currents being output by the individual inverters depending on the electrical variables measured at the location of the individual inverters Effects of the connection equipment between the individual inverters and the common grid connection point on currents are determined, electrical variables being measured at the grid connection point and are set in relation to the electrical variables measured at the same time at the individual inverters. The connection equipment between the individual inverters and the common grid connection point is taken into consideration in controlling the individual inverters.
    Type: Grant
    Filed: December 16, 2014
    Date of Patent: July 17, 2018
    Assignee: SMA Solar Technology AG
    Inventors: Yehia Tarek Fawzy, Daniel Premm, Vitali Sakschewski, Stijn Stevens, Christian Tschendel
  • Patent number: 10027239
    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: August 10, 2017
    Date of Patent: July 17, 2018
    Assignee: DELTA ELECTRONICS, INC.
    Inventors: Chang-Yong Wang, Li Cai, Yan-Song Lu
  • Patent number: 10018185
    Abstract: A system for commissioning a wind turbine is provided. The system includes a test wind turbine, one or more additional wind turbines coupled to the test wind turbine, and a control system. The control system includes a first control module for controlling the one or more additional wind turbines to act as a power source and provide power to the test wind turbine. The control system also includes a second control module for controlling the one or more additional wind turbines to act as a load for dissipating test power generated by the test wind turbine.
    Type: Grant
    Filed: December 29, 2014
    Date of Patent: July 10, 2018
    Assignee: GENERAL ELECTRIC COMPANY
    Inventors: Sumitha Mohan, Minesh Ashok Shah, Rajni Kant Burra, Govardhan Ganireddy, Akshay Krishnamurty Ambekar, Murali Mohan Baggu Data Venkata Satya, Allen Michael Ritter
  • Patent number: 10018177
    Abstract: A wind turbine includes a rotor comprising multiple blades mounted on a hub, MIMUs mounted on each blade for sensing parameter signals thereof, and a control system. The control system includes a wind speed calculation unit, a wind shear calculation unit, a pitch angle compensation command calculation unit, and a pitch control unit. The wind speed calculation unit is used for calculating wind speeds at the blades based at least on the sensed parameter signals. The wind shear calculation unit is used for calculating a characteristic shear exponent based at least on the calculated wind speeds. The pitch angle compensation command calculation unit is used for calculating pitch angle compensation commands of the blades based at least on the calculated characteristic shear exponent. The pitch control unit is used for adjusting the pitch angles of the blades based on the calculated pitch angle compensation commands.
    Type: Grant
    Filed: September 5, 2014
    Date of Patent: July 10, 2018
    Assignee: GENERAL ELECTRIC COMPANY
    Inventors: Xu Fu, Lihan He, Hai Qiu, Gerald Addison Curtin, Jr., Myungkeun Yoon
  • Patent number: 10012701
    Abstract: Embodiments of the invention provide techniques and apparatus for accurately estimating an aged capacity (Eaged) of a battery in an energy storage system (ESS) used on a wind farm. Eaged throughout the life of the battery may be estimated by measuring the internal impedance of the battery and using a relationship between the age of the battery (e.g., a number of charging cycles) and a maximum capacity corresponding to the battery. The state of charge (SOC) may be calculated based on the electromotive force (EMF) of the battery. The actual available energy (Eavailable) of the battery may be calculated based on the Eaged of the battery and the calculated SOC. In this manner, embodiments of the present invention may allow a wind farm to function as a virtual power plant (VPP) and deliver peak load electricity, regardless of intermittent wind velocity.
    Type: Grant
    Filed: March 15, 2011
    Date of Patent: July 3, 2018
    Assignee: VESTAS WIND SYSTEMS A/S
    Inventor: Jianhui Zhang
  • Patent number: 10006441
    Abstract: A management system for a wind energy plant including at least one control unit, and a method using the management system are disclosed. The management system is used to coordinate component modules of the wind energy plant with vibration damping modules and/or load reduction modules, wherein a sensor system supplies data of the operating states of the component modules for a system analysis. For this purpose, reactive vibrations and/or predictive forecasts of vibrations of the wind energy plant, and predictive disturbance variables are registered, and the vibration damping modules and/or load reduction modules in the control unit are activated, wherein an actuator carries out damping measures and/or load reduction measures on the component modules in accordance with the vibration damping modules and/or load reduction modules of the control unit.
    Type: Grant
    Filed: August 14, 2010
    Date of Patent: June 26, 2018
    Assignee: ZF FRIEDRICHSHAFEN AG
    Inventors: Lothar Schindele, Boris Buchtala, Bernd Schnurr, Andreas Vath
  • Patent number: 10006438
    Abstract: The invention relates to a method for operating at least a first wind turbine including the steps of: recording a tower oscillation, initiating a measure to reduce oscillation if the tower oscillation is or contains a longitudinal oscillation, and if the amplitude of the longitudinal oscillation exceeds a predefined threshold value, and the measure for reducing the oscillation comprises freezing the current pitch angle at the current value for a predefined freezing period, switching the pitch control algorithm used, in particular in such a way that the control speed is reduced, adjusting the yaw position by a predefined yaw angle, switching the operation of the first wind turbine from a first operating mode based on a first power curve to a second operating mode based on a second power curve, and/or if, with regard to the current wind direction, the first wind turbine in a wind park is located behind a second wind turbine, adjusting the rotational speed of the first wind turbine to the rotational speed of the
    Type: Grant
    Filed: April 9, 2015
    Date of Patent: June 26, 2018
    Assignee: Wobben Properties GmbH
    Inventor: Wolfgang de Boer
  • Patent number: 10006437
    Abstract: A method for operating a wind power plant having at least one rotor blade, the blade angle of which can be adjusted. The wind power plant is operated with a predefinable reduced energy output set point. To determine the potential output, at least one predefinable operating parameter of the wind power plant is measured and is applied to at least one stored characteristic curve for the reduced energy output set point. The actual energy output is determined and the loss in the output is formed from the difference between the potential output and the actual energy output.
    Type: Grant
    Filed: March 10, 2014
    Date of Patent: June 26, 2018
    Assignee: Senvion SE
    Inventors: Sebastian Böhme, Bert Gollnick
  • Patent number: 10001109
    Abstract: A multifunctional wind power green-energy apparatus generally includes a carrying base, a plurality of wind power generation devices mounted on the carrying base and includes a plurality of blade sections, and at least one electricity accumulation device, water pumping motor, and the air storage device arranged at one side of the carrying base and electrically connected with the wind power generation devices. With such a structural arrangement, through simple combination of the carrying base and the wind power generation devices, terrain limitation conditions for availability of wind power green energy can be reduced to the least for applications to diversified environments. Through operations in combination with the electricity accumulation device, the water pumping motor, and the air storage device, accumulation of electrical energy or direct use of the energy can be available. As such, the utilization of the wind power generation devices can be improved.
    Type: Grant
    Filed: November 4, 2016
    Date of Patent: June 19, 2018
    Assignee: TRUE TEN INDUSTRIAL CO., LTD.
    Inventor: Shun-Tsung Lu
  • Patent number: 10001108
    Abstract: A method for operating a wind turbine is provided. The wind turbine includes a rotor with at least one rotor blade. The method includes determining an actual value of at least one of a first variable indicative of a failure state of the wind turbine and a second variable of the wind turbine correlated to a status of the wind turbine or an ambient status. The method further includes estimating an occurrence of a detrimental overspeed state of the wind turbine from at least one of the determined actual values, wherein a variable speed limit is adjusted based on the result of the estimation. The method further includes operating the wind turbine having regard to the variable speed limit. A control system for performing this method and a wind turbine including the control system is provided.
    Type: Grant
    Filed: January 9, 2013
    Date of Patent: June 19, 2018
    Assignee: GENERAL ELECTRIC COMPANY
    Inventor: Hubert Oing
  • Patent number: 9995281
    Abstract: A drive of an energy generation system with a drive shaft (9) has an electrical machine (8) which is connected to a power system (10), and a differential gear mechanism (3) with three drives and outputs, wherein a first drive is connected to the drive shaft (9), an output is connected to the electric machine (8), and a second drive is connected to a differential drive (6) which is connected via a frequency converter (7) and optionally a transformer (5) to the power system (10). The electric machine (8) can be connected to the frequency converter (7) and as result full converter mode can continue to be operated at relatively low wind speeds.
    Type: Grant
    Filed: January 9, 2014
    Date of Patent: June 12, 2018
    Assignee: SET SUSTAINABLE ENERGY TECHNOLOGIES GMBH
    Inventors: Markus Waldner, Gerald Hehenberger
  • Patent number: 9998030
    Abstract: The present techniques include methods and systems for operating converter to maintain a lifespan of the converter. In some embodiments, the operating frequency of the converter may be increased such that stress may be reduced on the bond wires of the converter. More specifically, embodiments involve calculating the aging parameters for certain operating conditions of the converter operating in a maximum power point tracking (MPPT) mode and determining whether the MPPT operation results in aging the converter to a point which reduces the converter lifespan below a desired lifespan. If the MPPT operation reduces the converter lifespan below the desired lifespan, the frequency of the converter may be increased such that the converter may be controlled to operate at a percentage of MPPT. Thus, in some embodiments, power output may be optimized with respect to maintaining a desired lifespan of the converter.
    Type: Grant
    Filed: May 22, 2014
    Date of Patent: June 12, 2018
    Assignee: ROCKWELL AUTOMATION TECHNOLOGIES, INC.
    Inventors: Lixiang Wei, Russel J. Kerkman, Richard A. Lukaszewski, Haihui Lu, Zhenhuan Yuan
  • Patent number: 9995278
    Abstract: The present disclosure is directed to a digital twin interface for managing a wind farm having a plurality of wind turbines. The digital twin interface includes a graphical user interface (GUI) displaying a digital equivalent of the wind farm. For example, the digital equivalent of the wind farm includes environmental information and a digital representation of each of the wind turbines arranged in the wind farm. The interface also includes a control icon arranged with each of the digital representations of the wind turbines. In certain embodiments, the control icons of each wind turbine may correspond to a control dial. More specifically, the control icon of each digital representation of the wind turbines includes information regarding current and optimum operating conditions of the digital wind turbine. The interface also includes one or more control features configured to optimize performance of the wind farm.
    Type: Grant
    Filed: December 10, 2015
    Date of Patent: June 12, 2018
    Assignee: GENERAL ELECTRIC COMPANY
    Inventors: Arnold M. Lund, Karl Mochel, Jeng-Weei Lin, Raimundo Onetto, Jayanthi Srinivasan, Peter Gregg, Jeffrey Eric Bergman, Kenneth D. Hartling, Jr., Anwar Ahmed, Sham Chotai
  • Patent number: 9995279
    Abstract: A wind turbine blade includes one or more electric powered modules powered by light beams so as to provide a galvanic separation between the electric powered modules and a lightning protection system in a wind turbine blade. The modules have a power supply converting an energy source in the form of light beams to electrical power for the one or more modules. A wind turbine and a method for manufacturing a wind turbine blade are also disclosed.
    Type: Grant
    Filed: December 10, 2012
    Date of Patent: June 12, 2018
    Assignee: VESTAS WIND SYSTEMS A/S
    Inventor: John Johannes Mathias Hubertus Nieuwenhuizen
  • Patent number: 9998050
    Abstract: A method is provided for controlling the operation of a wind turbine includes (a) receiving an active power reference signal; (b) determining, based on the active power reference signal and an active power feedback signal, a first voltage control signal and a power controller frequency signal; (c) receiving a power reference signal; (d) determining, based on the power reference signal and the power feedback signal, a power offset frequency signal; (e) determining, based on the power controller frequency signal, a second voltage control signal; (f) determining, based on the power offset frequency signal, an angle signal indicative for an actual angle of a rotating dq reference frame; and (g) controlling the operation of a power converter based on the first voltage control signal, the second voltage control signal, and the angle signal.
    Type: Grant
    Filed: June 14, 2016
    Date of Patent: June 12, 2018
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Paul Brian Brogan, Nikolaus Goldenbaum, Rainer Zurowski
  • Patent number: 9998031
    Abstract: A neutral point clamped, multilevel level converter includes a DC voltage link; a first capacitor coupling one side of the DC link to a neutral point; a second capacitor coupling another side of the DC link to the neutral point; a plurality of phase legs, each phase leg including switches, each phase leg coupled to an AC node; a current sensor associated with each AC node; and a controller generating a PWM signal to control the switches, the controller generating a current zero sequence component in response to current sensed at each of the current sensors, the controller adjusting a modulation index signal in response to the current zero sequence component to produce the PWM signal.
    Type: Grant
    Filed: August 29, 2017
    Date of Patent: June 12, 2018
    Assignee: OTIS ELEVATOR COMPANY
    Inventors: Luis Arnedo, Marinko Kovacic, Yang Wang, Shashank Krishnamurthy
  • Patent number: 9991771
    Abstract: This invention relates to an active control system for a variable electromotive-force generator (VEG) for use in wind turbines, ships, hybrid vehicles, and related applications.
    Type: Grant
    Filed: November 5, 2014
    Date of Patent: June 5, 2018
    Assignee: THE UNIVERSITY OF MARYLAND, BALTIMORE COUNTY
    Inventors: Weidong Zhu, Navid Goudarzi, Xuefeng Wang
  • Patent number: 9979199
    Abstract: A multiple input single output (MISO) hybrid power system includes an electronics system that maximizes output from multiple input sources of different types. In certain embodiments, the electronics system takes in variable power from a plurality of the input sources and outputs a precisely controlled voltage that may simultaneously power a load and charge batteries. The electronics system includes an intelligent controller that monitors input from the power sources and desired output of the system substantially constantly to control maximum power output from each power source. The controller runs through a decision making algorithm to obtain maximum power from the power sources and output a single constant load.
    Type: Grant
    Filed: October 11, 2013
    Date of Patent: May 22, 2018
    Assignee: Windstrip LLC
    Inventors: Joe Maniaci, Jeffrey Buchholz
  • Patent number: 9970419
    Abstract: This disclosure provides an apparatus and system for an energy capturing pod (ECP). The ECP includes a specialized funnel shell, and a turbine. The turbine is structured with a horizontal axle in respect to a front opening of the ECP. The specialized funnel shell is designed to accelerate in coming wind speed. The specialized funnel shell includes a horizontal top airfoil that is inverted and linear along a width of the specialized funnel shell, and a horizontal bottom airfoil that is linear along the width of the specialized funnel shell.
    Type: Grant
    Filed: November 27, 2017
    Date of Patent: May 15, 2018
    Inventor: Tarek O. Souryal
  • Patent number: 9970417
    Abstract: This disclosure relates to systems and methods for controlling a wind converter for a weak electrical grid. In one embodiment of the disclosure, a system for controlling the wind converter includes a wind converter connected to an electrical grid at a point of connection (POC) and operable to transfer a power to the electrical grid. The system includes a first control loop operable to calculate, based on electrical grid parameters and wind converter characteristics, a voltage reference to be generated by the wind converter. The system includes a second control loop to convert, based on the electrical grid parameters, the voltage reference into a current reference. The second loop converts the angle information of the voltage reference into a voltage at the POC. The system includes a third control to regulate, based at least on the current reference, the power transferred by the wind converter to the electrical grid.
    Type: Grant
    Filed: April 14, 2016
    Date of Patent: May 15, 2018
    Assignee: GENERAL ELECTRIC COMPANY
    Inventors: Zhihui Yuan, Robert Roesner, Stefan Schroeder, Ara Panosyan, Krishna Kumar Anaparthi
  • Patent number: 9970415
    Abstract: A method and a system for managing loads on a wind turbine are provided. The computer-implemented method is implemented using a processor coupled to a memory device. The method includes determining a first moment of a wind load acting about a first axis of a rotor of the wind turbine, determining a second moment of a wind load acting about a second axis of a rotor of the wind turbine, and determining a resultant moment of the first moment and the second moment. The method also includes generating an error signal indicating a difference between the resultant moment and a predetermined moment level threshold signal and generating, by the processor, a first activation signal over a range of the generated error signal between a first zero activation signal level and a first full activation signal level.
    Type: Grant
    Filed: June 12, 2014
    Date of Patent: May 15, 2018
    Assignee: GENERAL ELECTRIC COMPANY
    Inventors: Pranav Agarwal, Jigar Jayesh Shah
  • Patent number: 9970413
    Abstract: The invention provides a wind turbine, a control system for a wind turbine and a method for controlling a wind turbine where asymmetry in load on the rotor is compensated by individual pitching by comparing a load distribution over the rotor plane with a threshold value. To avoid unnecessary compensation, the threshold value is adjusted based on a loading of the wind turbine or based on climate conditions under which the turbine operates.
    Type: Grant
    Filed: June 6, 2013
    Date of Patent: May 15, 2018
    Assignee: VESTAS WIND SYSTEMS A/S
    Inventors: Ali Zaib, Kenneth Tougaard Simonsen
  • Patent number: 9972993
    Abstract: An electrical system for controlling a wind turbine is provided. The electrical system includes a first resistive element, a storage element and a controller. The first resistive element and the storage element are coupled to a DC link of the wind turbine. The controller is used for switching between the first resistive element and the storage element in response to a grid side fault condition to minimize mechanical loads induced by the grid side fault condition.
    Type: Grant
    Filed: October 31, 2013
    Date of Patent: May 15, 2018
    Assignee: GENERAL ELECTRIC COMPANY
    Inventors: Rajni Kant Burra, Victor Robert Abate, David Cole Magnuson, Keith Longtin
  • Patent number: 9957803
    Abstract: The claimed invention relates to a turbine adapted to extract energy from the velocity of a streaming fluid such as wind, steam, tidal streams and water waves. The invented turbine is arranged with its axis of turbine rotation directed at substantially right angles to the current direction of the streaming fluid and comprising a kind of self-supported blade body which is rotationally symmetric and constructed by rotor blades integrated transversely and supported two by two, allowing the fluid to flow through the turbine with less turbulence compared to other types of turbines equipped with separate rotor blades.
    Type: Grant
    Filed: July 21, 2014
    Date of Patent: May 1, 2018
    Assignee: GOX AB
    Inventor: Sten Thomas Kullander
  • Patent number: 9956445
    Abstract: A fire suppression system for a fire zone including a first tank containing a first liquid component of a two-part foam and a second tank containing a second liquid component of the foam. The system includes at least one liquid component release device configured to be selectively capable of releasing the first and second components from their respective containers upon receipt of a signal from a fire detector upon detection of a fire. The two-part foam components are propelled through the system by a pressurized propellant that, upon release of the release device, causes the exit of the foam components from their respective tanks, through a mixing conduit to at least one nozzle. The nozzle is configured to spray the liquid component foam mixture into the fire zone wherein the foam cures into a substantially semi-rigid, closed cell foam that is substantially impermeable and may have charring and/or intumescence properties.
    Type: Grant
    Filed: May 23, 2016
    Date of Patent: May 1, 2018
    Inventor: William Armand Enk, Sr.
  • Patent number: 9957951
    Abstract: A method of controlling a wind turbine having a rotor and a generator for producing power, the wind turbine being designed for a nominal load, the method comprising the steps of: determining a current load acting on at least a part of the wind turbine; calculating a load error, the load error representing the difference between the nominal load and the current load; controlling the wind turbine based on the load error; wherein the step of controlling the wind turbine comprises altering a parameter of the wind turbine so that the power or torque produced by the generator is altered.
    Type: Grant
    Filed: February 17, 2016
    Date of Patent: May 1, 2018
    Assignee: Vestas Wind Systems A/S
    Inventor: Poul Brandt Christensen
  • Patent number: 9951628
    Abstract: Wind turbine (1) comprising a rotor (2) around a rotation shaft (3), having a plurality of blades (4) at a distance around the rotation shaft (3), in which the blades (4) can drive the rotor (2); a cavity (10) which extends between the ends (15) of the blades (4) closest to the rotation shaft (3); a plurality of vanes (5) around the rotor (2) for guiding wind to the blades (4), in which the vanes (5) extend from the ends (14) of the blades (4) furthest from the rotation shaft (3) to a second end (16) of the vanes (5). The vanes (5) and blades (4) merge into each other at the same curvature mathematically tangentially in a plane at right angles to the rotation shaft (3) and the curvature of the vanes (5) is described by a part of a logarithmic spiral.
    Type: Grant
    Filed: May 7, 2013
    Date of Patent: April 24, 2018
    Inventor: Geert Devisch
  • Patent number: 9951748
    Abstract: A hydroelectric power system and pump suitable for the system are disclosed which can make efficient use of the energy available in water flows with considerably variable flow rates. A simple, compact variable displacement axial piston pump can be operated so as to provide an essentially constant output pumping pressure and variable output volume that varies efficiently in accordance with water flow rate. The system is particularly suitable for shoreline tidal power generation and provides firm power output throughout the tidal slacks occurring during the tidal reversals.
    Type: Grant
    Filed: January 22, 2013
    Date of Patent: April 24, 2018
    Assignee: YOURBROOK ENERGY SYSTEMS LTD.
    Inventor: Laird Galen Bateham
  • Patent number: 9945365
    Abstract: An apparatus configured to hydraulically fracture an earth formation, includes a pump configured to hydraulically fracture the earth formation by pumping a fracturing liquid into a borehole penetrating the earth formation and an electric motor having a rotor coupled to the pump and a stator. A motor control center is configured to apply an alternating electrical voltage having a fixed-frequency to the stator in order to power the electric motor, wherein the apparatus and motor control center do not have a variable frequency drive.
    Type: Grant
    Filed: April 16, 2014
    Date of Patent: April 17, 2018
    Assignee: BJ Services, LLC
    Inventors: Jennifer Hernandez, Bruce A. Vicknair, Blake C. Burnette
  • Patent number: 9945358
    Abstract: A blade adjusting device for a wind turbine is connected to a plant safety chain and can open and close the plant safety chain by activating a switch. If a fault is detected in one of the blade adjusting devices, the respective control unit can open the plant safety chain. By opening the safety chain, a signal is sent to the blade adjusting devices, and so all the blade adjusting devices initiate a synchronous safety operation of at least two rotor blades when the signal is received.
    Type: Grant
    Filed: July 6, 2012
    Date of Patent: April 17, 2018
    Assignee: AE ROTOR HOLDING B.V.
    Inventors: Reinhard Vilbrandt, Ingo Ibendorf
  • Patent number: 9948096
    Abstract: The present invention relates to a method for providing control power to stabilize an AC electrical grid, comprising an energy store which can take up and emit electrical energy, wherein for the purpose of providing the control power, the energy store is used together with a differential power provider, wherein the AC electrical grid operates at a predefined frequency and a frequency band around the predefined frequency is defined and the control power to be provided in the case of a frequency deviation within the frequency band is provided by the energy store to the extent of more than 50%, relative to the total control power to be provided.
    Type: Grant
    Filed: December 9, 2013
    Date of Patent: April 17, 2018
    Assignees: Evonik Degussa GmbH, STEAG Power Saar GmbH
    Inventors: Georg Markowz, Carsten Kolligs, Erdem Simsek, Anna Flemming, Dennis Gamrad, Sebastien Cochet, Wolfgang Schweissthal
  • Patent number: 9941837
    Abstract: A process for determining a nonlinear response of a photovoltaic cell that includes: producing a first set of first light pulses including a first light that includes a first photon flux; and different first magnitudes of first photon flux; producing a second set of second light pulses that include: a second light including a second photon flux; and different second magnitudes of second photon flux; repeating the first light pulses in a selected combination with the second light pulses to produce a combinatorial set of combinatorial light pulses including: a combinatorial light comprising a combinatorial photon flux and different combinatorial magnitudes; irradiating a photovoltaic cell separately with the first set, second set, and the combinatorial set; separately producing, a first, second, and combinatorial photovoltaic output; and solving a system of linear equations to determine the nonlinear relationship between the photovoltaic output and the magnitude of flux.
    Type: Grant
    Filed: September 29, 2016
    Date of Patent: April 10, 2018
    Assignee: THE UNITED STATES OF AMERICA, AS REPRESENTED BY THE SECRETARY OF COMMERCE
    Inventors: Behrang H. Hamadani, Andrew M. Shore, Howard W. Yoon
  • Patent number: 9939485
    Abstract: The various technologies presented herein relate to providing prognosis and health management (PHM) of a photovoltaic (PV) system. A PV PHM system can eliminate long-standing issues associated with detecting performance reduction in PV systems. The PV PHM system can utilize an ANN model with meteorological and power input data to facilitate alert generation in the event of a performance reduction without the need for information about the PV PHM system components and design. Comparisons between system data and the PHM model can provide scheduling of maintenance on an as-needed basis. The PHM can also provide an approach for monitoring system/component degradation over the lifetime of the PV system.
    Type: Grant
    Filed: September 10, 2013
    Date of Patent: April 10, 2018
    Assignee: National Technology & Engineering Solutions of Sandia, LLC
    Inventors: Jay Johnson, Daniel Riley
  • Patent number: 9932969
    Abstract: Disclosed is a wind turbine, which comprises a rotatable structure being coupled to a hub of the wind turbine and to a generator rotor comprising a brake disc, a stationary structure being coupled to a generator stator and comprising a stator frame and a safety bearing element. The rotatable structure is rotatably coupled to the stationary structure, wherein the stator frame comprises a brake mounting section to which a calliper brake is mountable such that the brake disc is breakable by the mounted calliper brake. The safety bearing element is mounted to the brake mounting section such that the brake disc is in slidable contact with the safety bearing element if a distance between the brake mounting section and the brake disc is reduced below a predetermined reference value.
    Type: Grant
    Filed: April 26, 2016
    Date of Patent: April 3, 2018
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Uffe Eriksen, Claus Johansen, Jens Anton Agerskov Veng
  • Patent number: 9932968
    Abstract: A method of making a wind turbine blade (10) having a metallic lightning receptor (110) is described. The method comprises configuring a wind turbine blade (10) mold assembly (100) such that a clearance region (120) is defined between a mold surface (116) of at least one mold half (112, 114) and a majority of a metallic lightning receptor component (110) when the mold assembly (100) is closed, such that contact between that mold half (112, 114) and the metallic lightning receptor component (110) is substantially avoided. In certain embodiments of the invention, one or both mold halves (112, 114) are truncated such that the metallic lightning receptor component (110) projects from the mold (100) when the mold (100) is closed.
    Type: Grant
    Filed: November 20, 2013
    Date of Patent: April 3, 2018
    Assignee: Vestas Wind Systems A/S
    Inventors: Damien Rajasingam, Toby Collard
  • Patent number: 9920746
    Abstract: The invention relates to a method for controlling a generator of electric energy that is connected to an electrical supply grid on a grid connection point, comprising the following steps: feeding electrical power into the electrical supply grid, whereby the generator is operated in a first operating point, interrupting the feeding so that no power is fed into the supply grid if a fault in the electrical supply grid or a fault of the feeding into the electrical supply grid exists or is displayed, resuming the feeding so that electrical power is again fed into the supply grid, whereby the generator resumes the feeding in a second operating point or is gradually increased in said second operating point, and the second operating point is designed in such a way that it feeds into the supply grid with a higher stability reserve than the first operating point.
    Type: Grant
    Filed: July 3, 2013
    Date of Patent: March 20, 2018
    Assignee: Wobben Properties GmbH
    Inventors: Volker Diedrichs, Kai Busker, Alfred Beekmann
  • Patent number: 9920742
    Abstract: The present subject matter is directed to a system and method for operating a wind turbine. More specifically, the system and method determines a dynamic cut-in wind speed for the wind turbine based on one or more environmental conditions. In one embodiment, the method includes providing a predetermined cut-in wind speed for the wind turbine based on at least one estimated environmental condition for a wind turbine site; determining one or more actual environmental conditions near the wind turbine for a predetermined time period at the wind turbine site; determining a variance between the at least one estimated environmental condition and the one or more actual environmental conditions; calculating a dynamic cut-in wind speed based on the variance; and, operating the wind turbine based on the dynamic cut-in wind speed so as to increase wind turbine operational efficiency.
    Type: Grant
    Filed: February 20, 2014
    Date of Patent: March 20, 2018
    Assignee: General Electric Company
    Inventors: Vijaykumar Muppayya Hiremath, Shimnamol Padmanabhan Nair, Aswini Karteek Bommareddy, Karthikeyan Appuraj
  • Patent number: 9920747
    Abstract: A method of controlling power provided by a generator to an end system in which power is diverted from the output of said generator to an auxiliary system during periods of excessive power output from the generator. The diverted power is stored in an energy store and, during periods of lower power output from the generator, is returned to the end system by discharging the energy store. The diversion and return of power is controlled to maintain the power delivered to the end system at a desired mean power level. Diversion of power from the generator also has the effect of preventing the generator from producing excessive voltage levels.
    Type: Grant
    Filed: November 3, 2014
    Date of Patent: March 20, 2018
    Assignee: Openhydro IP Limited
    Inventors: Edward Spooner, Simon Cawthorne
  • Patent number: 9921339
    Abstract: The present invention is an apparatus and method of forecasting solar energy irradiance potential and subsequent photovoltaic output in a region. The apparatus and method includes collecting meteorological data for a given region and then estimating irradiance levels using parameters collected from the meteorological data. Solar energy production is then simulated using the collected meteorological data, estimated irradiance levels, and physical characteristics of a solar generating system in the given region at a predetermined time.
    Type: Grant
    Filed: March 30, 2015
    Date of Patent: March 20, 2018
    Assignee: STC.UNM
    Inventors: Anthony Robert Menicucci, Thomas P. Caudell, Andrea A. Mammoli
  • Patent number: 9920745
    Abstract: Wind farm comprising a farm master and a plurality of wind energy installations. The farm master has a controller with an input for a control parameter for power supplied to a grid and transmits desired value specifications to a local controller of the wind energy installations. The local controller has a dual structure and comprises a desired value channel, to which the desired value specification is applied by the farm master and which is designed to output a stationary reactive power desired value, and a responsive channel comprising an autonomous controller, to which no desired value specification is applied by the farm master and to which an actual voltage of the particular wind energy installation is applied via a washout filter. The autonomous controller with the washout filter enables a fast and dependent response to transient disturbances (e.g., voltage spikes and voltage dips as a result of a short circuit).
    Type: Grant
    Filed: April 29, 2013
    Date of Patent: March 20, 2018
    Assignee: SENVION SE
    Inventor: Jens Fortmann
  • Patent number: 9920743
    Abstract: A wind turbine includes wind turbine blades, a wind turbine rotor coupled to the wind turbine blades, a wind turbine generator coupled to the wind turbine rotor, a wind turbine converter coupled to the wind turbine generator, a controllable brake comprising one or more sources of controllable rotor torque adjustment for providing a first level of torque adjustment, a discrete brake for more coarsely providing a second level of torque adjustment, and a controller programmed for responding to a deceleration event by determining a required torque adjustment for braking, determining a sequence of applying the controllable brake and the discrete brake for driving a combination of the first and second levels of torque adjustment towards the required torque adjustment, and providing control signals for decelerating the wind turbine.
    Type: Grant
    Filed: October 21, 2015
    Date of Patent: March 20, 2018
    Assignee: GENERAL ELECTRIC COMPANY
    Inventors: Pranav Agarwal, Govardhan Ganireddy, Mark Edward Cardinal, Venkata Krishna Vadlamudi
  • Patent number: 9915244
    Abstract: A method of operating a wind power plant, with at least one wind turbine generator connected to an electrical grid is provided. The method includes monitoring a frequency parameter and comparing it with a frequency set point, as to select a low or high frequency event and determining a power reference to the a least one wind turbine generator, based on the frequency parameter. In case a high frequency event is detected, the power reference is determined as a minimum of a selection of at least a first and a second minimum power reference. And in case a low frequency event is detected, the power reference is determined as a maximum of a selection of at least a first and a second maximum power reference, dispatching the power reference to the at least one wind turbine generator.
    Type: Grant
    Filed: May 10, 2013
    Date of Patent: March 13, 2018
    Assignee: VESTAS WIND SYSTEMS A/S
    Inventor: Germán Claudio Tarnowski
  • Patent number: 9909565
    Abstract: Wind turbine rotational system having several drives and a central control system (CCS), each drive comprising a motor, an electronic converter and an actuator. The CCS sends speed and torque setpoints to the electronic converters which drive the motors according to said setpoints. Operation of the system comprises: designating a drive as master and the other drives as slaves; designating, for each slave, one of the drives as reference drive; the CCS determining master speed and torque setpoints, and sending them to the master; the CCS obtaining real torque of the master; CCS obtaining real speed of each reference drive; and the CCS sending to each slave a slave speed setpoint equal to the master speed setpoint, and a slave torque setpoint equal to the real torque of the master plus a variable offset based on a difference between the master speed setpoint and the real speed of its reference drive.
    Type: Grant
    Filed: January 14, 2014
    Date of Patent: March 6, 2018
    Assignee: ALSTOM Renewable Technologies
    Inventor: Pedro Palomares Rentero
  • Patent number: 9909566
    Abstract: A device comprising a vertical axis wind turbine comprising an arm, a housing coupled to the arm, a generator housed within the housing, and a blade extending along the housing vertically.
    Type: Grant
    Filed: May 4, 2017
    Date of Patent: March 6, 2018
    Inventor: Thomas Jones