Patents by Inventor Robert J. Nelson

Robert J. Nelson has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 12079922
    Abstract: A system and method for translating a 2D image to a 3D image is provided. A 2D image having pixels grouped into tiles is obtained. Contour lines associated with an altitude value are located on the 2D image. The altitude values are determined. Each tile in the 2D image is represented using at least one voxel. A height map of the voxels is generated based on the contour lines and altitude values as a base layer for a 3D image. A terrain type of each of the voxels of the 3D image is determined and objects are placed in the 3D image. The 3D image is output.
    Type: Grant
    Filed: January 9, 2023
    Date of Patent: September 3, 2024
    Assignee: XEROX CORPORATION
    Inventors: Gregory M. Youngblood, Matthew Shreve, Mark J. Stefik, Robert Thomas Krivacic, Lester D. Nelson, Jacob Le
  • Patent number: 10954921
    Abstract: The detecting a shadow is determined by a modeling of at least a portion of a wind turbine. First and second sensors are arranged relative to the model such that the first sensor detects a light and the second sensor detects a shadow during the conditions where the shadow would be produced.
    Type: Grant
    Filed: May 1, 2017
    Date of Patent: March 23, 2021
    Assignee: SIEMENS GAMESA RENEWABLE ENERGY A/S
    Inventor: Robert J Nelson
  • Patent number: 10910841
    Abstract: A system and method for regulating a voltage at a point of common coupling (35) (PCC) of a distributed energy resource farm (1) connected to an electrical power grid (37). The distributed energy resource farm includes a plurality of connected distributed energy resources (2, 3) each supplying a terminal voltage. The system includes a component (50) for measuring a PCC voltage at the PCC, and another component (39, 41) for determining a first value based on a relationship between a scheduled voltage at the PCC and the measured PCC voltage relative to a dead band voltage region (66). A further component (39, 41) regulates the voltage at the point of common coupling by controlling the terminal voltage of each one of the plurality of distributed energy resources in response to the relationship between the scheduled voltage and the measured voltage at the PCC.
    Type: Grant
    Filed: November 10, 2015
    Date of Patent: February 2, 2021
    Assignee: SIEMENS GAMESA RENEWABLE ENERGY A/S
    Inventors: Robert J. Nelson, Najlae Yazghi
  • Patent number: 10630079
    Abstract: A wind turbine system (20, 70) is connected to an electrical grid (42) by an inverter (38) that provides turbine terminal voltage (Vt) support to the grid during a grid low voltage fault that is concurrent with a lack of real power production from the generator (30) by providing reactive power to the grid. A processor (46) controls the inverter to preserve a minimum voltage on a local DC bus (34) by stopping the reactive power output when the DC bus voltage drops to a threshold value (59) that is above a low bus voltage trip setpoint (56). An energy storage device (48) such as a battery may be connected to the DC bus to provide power that supports a prolonged ride-through capability during the grid fault.
    Type: Grant
    Filed: February 3, 2016
    Date of Patent: April 21, 2020
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Robert J. Nelson, John D. Amos
  • Publication number: 20190243519
    Abstract: This disclosure describes a scrolling graphical user interface element that displays, in real time or substantially real time, search requests that are received by a system. For example, when a query is received, details about the query are stored and subsequently used to generate a selectable item that is provided on the scrolling graphical user interface element. The scrollable graphical user interface is provided on a webpage and is updated with selectable items each time a new query is received. Thus, any user accessing the webpage can view, in real time or substantially real time, other queries that are being submitted by other users.
    Type: Application
    Filed: February 7, 2018
    Publication date: August 8, 2019
    Applicant: Deals Publications Inc.
    Inventors: Robert J. Nelson, Jarrod W. Page, Don S. Nelson
  • Publication number: 20190242367
    Abstract: The detecting a shadow is determined by a modeling of at least a portion of a wind turbine. First and second sensors are arranged relative to the model such that the first sensor detects a light and the second sensor detects a shadow during the conditions where the shadow would be produced.
    Type: Application
    Filed: May 1, 2017
    Publication date: August 8, 2019
    Inventor: Robert J Nelson
  • Publication number: 20190036343
    Abstract: A wind turbine system (20, 70) is connected to an electrical grid (42) by an inverter (38) that provides turbine terminal voltage (Vt) support to the grid during a grid low voltage fault that is concurrent with a lack of real power production from the generator (30) by providing reactive power to the grid. A processor (46) controls the inverter to preserve a minimum voltage on a local DC bus (34) by stopping the reactive power output when the DC bus voltage drops to a threshold value (59) that is above a low bus voltage trip setpoint (56). An energy storage device (48) such as a battery may be connected to the DC bus to provide power that supports a prolonged ride-through capability during the grid fault.
    Type: Application
    Filed: February 3, 2016
    Publication date: January 31, 2019
    Applicant: SIEMENS AKTIENGESELLSCHAFT
    Inventors: ROBERT J. NELSON, JOHN D. AMOS
  • Patent number: 10042374
    Abstract: Method and apparatus are provided for determining a grid condition, such as a weakened grid condition, and controlling a power plant, such as a wind or solar power plant, in a manner which is appropriate to the grid condition. The method includes measuring (14) output parameters of a generator, such as a wind turbine or PV generator. The measured output parameters include reactive power and voltage. The method further includes determining (16) a relationship between the measured output parameters of the generator. The relationship between the measured output parameters of the generator is indicative of a condition of a power grid to which the plant supplies power. The method allows controlling (18) the plant responsive to the relationship between the measured output parameters of the generator to avoid onset of oscillatory behavior, which could otherwise occur in the power plant in the presence of a weakened grid condition.
    Type: Grant
    Filed: June 13, 2014
    Date of Patent: August 7, 2018
    Assignee: Siemens Gamesa Renewable Energy A/S
    Inventors: Robert J. Nelson, Najlae M. Yazghi, Hongtao Ma, William F. Clark
  • Publication number: 20180219382
    Abstract: A system and method for regulating a voltage at a point of common coupling (35) (PCC) of a distributed energy resource farm (1) connected to an electrical power grid (37). The distributed energy resource farm includes a plurality of connected distributed energy resources (2, 3) each supplying a terminal voltage. The system includes a component (50) for measuring a PCC voltage at the PCC, and another component (39, 41) for determining a first value based on a relationship between a scheduled voltage at the PCC and the measured PCC voltage relative to a dead band voltage region (66). A further component (39, 41) regulates the voltage at the point of common coupling by controlling the terminal voltage of each one of the plurality of distributed energy resources in response to the relationship between the scheduled voltage and the measured voltage at the PCC.
    Type: Application
    Filed: November 10, 2015
    Publication date: August 2, 2018
    Inventors: Robert J. Nelson, Najlae Yazghi
  • Patent number: 9871382
    Abstract: A method and a controller for continuously operating a plurality of electric energy generating machines during a high voltage condition at a point of common coupling of the plurality of electric energy generating machines are provided herein. The method includes a) sensing a voltage level at the point of common coupling exceeding a permitted voltage level; b) curtailing an active power output of the plurality of electric energy generating machines such that a reactive capability of the plurality of electric energy generating machines is increased; c) establishing a set point of an electric quantity being present at the point of common coupling such that a reactive electric component providable by the electric energy generating machines is increased; and d) controlling an electric energy generating machine based on the set point of the electric quantity such that the high voltage condition at common coupling is at least partially remedied.
    Type: Grant
    Filed: April 29, 2013
    Date of Patent: January 16, 2018
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Robert J. Nelson, Najlae M. Yazghi, William F. Clark
  • Patent number: 9593672
    Abstract: A power generating device (2, 3) for supplying power to a power system (37). The power generating device includes a first component (87) for generating a first signal representing a frequency of a voltage on the power system, a power converter (90) for generating an output voltage, a second component (82) responsive to the first signal and to a second signal representing the output voltage, the second component producing an error signal representing a phase angle difference between the first and second signals, and the error signal being an input to the power converter for controlling the power converter to maintain the phase angle difference between the output voltage and the first signal.
    Type: Grant
    Filed: August 7, 2013
    Date of Patent: March 14, 2017
    Assignee: Siemens Aktiengesellschaft
    Inventors: Robert J. Nelson, Jesper Hammelsvang, Hongtao Ma, Jakob Skjoeth
  • Patent number: 9570916
    Abstract: A method for compensating at least partially a frequency deviation in a grid is provided in which a grid frequency is determined and the grid frequency is applied to a grid frequency criterion. If the grid frequency meets the grid frequency criterion, a determination is made as to a set of wind turbines from a wind turbine power plant fleet based on the grid frequency criterion, and a command for a transient frequency response is transmitted to the set of wind turbines.
    Type: Grant
    Filed: October 15, 2013
    Date of Patent: February 14, 2017
    Assignee: Siemens Aktiengesellschaft
    Inventors: Kaj Skov Nielsen, Robert J. Nelson
  • Patent number: 9541062
    Abstract: A method of operating a wind park having a plurality of wind turbines is provided. The method includes determining a grid condition indicator indicative of the condition of a grid into which the wind park feeds; determining a first maximum power value of the wind park on the basis of the grid condition indicator; determining an operating margin on the basis of the grid condition indicator, for a grid condition indicator indicative of a weak grid; determining a second maximum power value on the basis of the operating margin; and curtailing the active power output of the wind park according to a maximum power value. A computer program product for carrying out the steps of such a method; an active power controller adapted for use in operating a wind turbine of a wind park; a wind turbine; and a wind park are also provided.
    Type: Grant
    Filed: November 20, 2013
    Date of Patent: January 10, 2017
    Assignee: Siemens Aktiengesellschaft
    Inventors: Bo Yin, Bjorn Andresen, Michael Stoettrup, Robert J. Nelson, Per Egedal
  • Patent number: 9478987
    Abstract: A wind turbine (8) for controlling power oscillations on a grid of a power system (28). The wind turbine (8) comprises rotor blades (12) for turning by the wind, an electric generator (20) rotatably coupled to the rotor blades (12), a power converter (24) responsive to electricity generated by the electric generator (20), the power converter (24) for converting the generated electricity to a frequency and voltage suitable for supply to the power grid (28), and the power converter for regulating voltage on the grid supplemented by modulating real power for damping the power oscillations.
    Type: Grant
    Filed: November 10, 2009
    Date of Patent: October 25, 2016
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventor: Robert J. Nelson
  • Patent number: 9458828
    Abstract: A method of controlling a wind power plant, the wind power plant having a plurality of wind turbines and being connected to a power grid is provided. The method includes (a) detecting a grid frequency instability, (b) selecting a subset of wind turbines, (c) modifying a power reference for each wind turbine in the selected subset of wind turbines to respond to the grid frequency instability, and (d) applying the modified power references to the corresponding wind turbines in the selected subset of wind turbines. A wind power plant controller, a wind power plant, a computer program, and a computer program product are also provided.
    Type: Grant
    Filed: December 9, 2013
    Date of Patent: October 4, 2016
    Assignee: Siemens Aktiengesellschaft
    Inventors: Kaj Skov Nielsen, Robert J. Nelson, Hongtao Ma
  • Patent number: 9450416
    Abstract: A wind turbine generator park (1) for supplying power to a power system (37), the park having an assigned first droop response characteristic for use in responding to an under-frequency occurrence on the power system (37). The park comprises a first comparator (108) for generating a first signal when the park is operating according to a curtailed condition, a second comparator (100) for indicating that a change in a frequency of a voltage or current on the power system (37) is greater than a first threshold value, and a controller (114) responsive to the first and second signals for controlling the park according to a second response characteristic causing the park (1) to supply an amount of power to the power system (37) greater than the power supplied according to the first droop response characteristic.
    Type: Grant
    Filed: July 16, 2013
    Date of Patent: September 20, 2016
    Assignee: Siemens Aktiengesellschaft
    Inventors: Hongtao Ma, Robert J. Nelson, Najlae M. Yazghi, William F. Clark
  • Patent number: 9318283
    Abstract: Apparatus to provide arc flash protection regarding a wind turbine. In one embodiment, a wind turbine (10) includes a wind turbine generator (12) to generate an alternating current power. A transformer (14) has a high-voltage side (16) coupled to a load. A circuit breaker (18) is adapted to selectively reduce arc flash energy available to the wind turbine. The circuit breaker may be arranged to provide circuit interruption between the generator and a low-voltage side (20) of the transformer upon detection of a fault condition. The circuit breaker includes an arc flash protection mode (24) and a normal protection mode (22). In response to a sensed condition, a respective one of the modes may be automatically set so that the circuit breaker can perform the circuit interruption in accordance with the protection functionality of the set mode.
    Type: Grant
    Filed: May 22, 2014
    Date of Patent: April 19, 2016
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Edmund B. Becker, III, Robert J. Nelson
  • Publication number: 20150361954
    Abstract: Method and apparatus are provided for determining a grid condition, such as a weakened grid condition, and controlling a power plant, such as a wind or solar power plant, in a manner which is appropriate to the grid condition. The method includes measuring (14) output parameters of a generator, such as a wind turbine or PV generator. The measured output parameters include reactive power and voltage. The method further includes determining (16) a relationship between the measured output parameters of the generator. The relationship between the measured output parameters of the generator is indicative of a condition of a power grid to which the plant supplies power. The method allows controlling (18) the plant responsive to the relationship between the measured output parameters of the generator to avoid onset of oscillatory behavior, which could otherwise occur in the power plant in the presence of a weakened grid condition.
    Type: Application
    Filed: June 13, 2014
    Publication date: December 17, 2015
    Inventors: Robert J. Nelson, Najlae M. Yazghi, Hongtao Ma, William F. Clark
  • Publication number: 20150340180
    Abstract: Apparatus to provide arc flash protection regarding a wind turbine. In one embodiment, a wind turbine (10) includes a wind turbine generator (12) to generate an alternating current power. A transformer (14) has a high-voltage side (16) coupled to a load. A circuit breaker (18) is adapted to selectively reduce arc flash energy available to the wind turbine. The circuit breaker may be arranged to provide circuit interruption between the generator and a low-voltage side (20) of the transformer upon detection of a fault condition. The circuit breaker includes an arc flash protection mode (24) and a normal protection mode (22). In response to a sensed condition, a respective one of the modes may be automatically set so that the circuit breaker can perform the circuit interruption in accordance with the protection functionality of the set mode.
    Type: Application
    Filed: May 22, 2014
    Publication date: November 26, 2015
    Applicant: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Edmund B. Becker, III, Robert J. Nelson
  • Patent number: 9190845
    Abstract: A wind turbine park (242) connected to a transmission system (234). The wind turbine park includes a component (230) for determining a short circuit ratio and based thereon for determining a parameter adjustment recipe, and a controller (238) for controlling an output of the wind turbine park, the controller (238) executing a control algorithm using a determined parameter adjustment recipe, the determined parameter adjustment recipe responsive to the short circuit ratio and determined within the component (230) or within the controller (238).
    Type: Grant
    Filed: July 17, 2012
    Date of Patent: November 17, 2015
    Assignee: Siemens Aktiengesellschaft
    Inventors: Robert J. Nelson, Hongtao Ma