Patents by Inventor Yuko Hirase

Yuko Hirase 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: 10770905
    Abstract: While a power storage installation operates as a virtual generator to maintain an power storage amount, a power generating installation calculates a first generated power change rate command value from a deviation between a frequency of a power distribution system and a frequency command value, calculates a second generated power change rate command value from received power measured by a received power measurer, calculates a second active power command value by integrating a generated power change rate command value to which the first generated power change rate command value and the second generated power change rate command value are added, and controls an output of the power generating installation based on the second active power command value.
    Type: Grant
    Filed: December 27, 2017
    Date of Patent: September 8, 2020
    Assignee: KAWASAKI JUKOGYO KABUSHIKI KAISHA
    Inventors: Kazushige Sugimoto, Kenichi Sakimoto, Tomoyuki Hirai, Shogo Hamano, Shimpei Kobayashi, Yuko Hirase, Kensho Abe, Osamu Noro, Shogo Katsura, Eiji Yoshimura
  • Publication number: 20190334352
    Abstract: While a power storage installation operates as a virtual generator to maintain an power storage amount, a power generating installation calculates a first generated power change rate command value from a deviation between a frequency of a power distribution system and a frequency command value, calculates a second generated power change rate command value from received power measured by a received power measurer, calculates a second active power command value by integrating a generated power change rate command value to which the first generated power change rate command value and the second generated power change rate command value are added, and controls an output of the power generating installation based on the second active power command value.
    Type: Application
    Filed: December 27, 2017
    Publication date: October 31, 2019
    Applicant: KAWASAKI JUKOGYO KABUSHIKI KAISHA
    Inventors: Kazushige SUGIMOTO, Kenichi SAKIMOTO, Tomoyuki HIRAI, Shogo HAMANO, Shimpei KOBAYASHI, Yuko HIRASE, Kensho ABE, Osamu NORO, Shogo KATSURA, Eiji YOSHIMURA
  • Patent number: 9768712
    Abstract: A power conversion device includes: a power converter to perform output to an output line connected to a single-phase power system; and a control device to control the power converter so it operates as a virtual synchronous generator. The control device includes: a voltage and current measurer to obtain, from a single-phase system voltage, an angular velocity and a phase of the system voltage by an estimation operation that uses the phase of the system voltage as a parameter; a power obtainer to obtain active power and reactive power; a governor model to calculate a phase difference; an AVR model to calculate an absolute value of an induced voltage of a virtual synchronous generator; a generator model to calculate current command values corresponding to an armature current of the virtual synchronous generator; and a current controller to generate and output a PWM signal to the power converter.
    Type: Grant
    Filed: February 16, 2015
    Date of Patent: September 19, 2017
    Assignee: KAWASAKI JUKOGYO KABUSHIKI KAISHA
    Inventors: Kenichi Sakimoto, Yuko Hirase, Eiji Yoshimura, Shogo Katsura, Hidehiko Nakagawa, Osamu Noro, Yuji Shindo
  • Patent number: 9698603
    Abstract: A first internal phase difference angle calculator for integrating a deviation between a first frequency command value and a frequency obtained by frequency obtaining device to calculate a first internal phase difference angle, a first internal electromotive voltage command value calculator for proportioning and calculating a deviation between a first reactive power command value and a reactive power obtained based on the value measured by first measuring device, and adding a reference voltage to the deviation so as to calculate a first internal electromotive voltage command value, and a first current command value calculator for calculating a command value of an output current from a first power converter based on the first internal phase difference angle, the first internal electromotive voltage command value, and a voltage measured by the voltage measuring device. The apparatus controls the first power converter based on an output from the first current command value calculator.
    Type: Grant
    Filed: December 5, 2013
    Date of Patent: July 4, 2017
    Assignee: KAWASAKI JUKOGYO KABUSHIKI KAISHA
    Inventors: Kazushige Sugimoto, Masahide Kawamura, Kentaro Sakata, Mitsuchika Ogawa, Kentaro Tsuda, Takefumi Iizaka, Yuko Hirase
  • Publication number: 20170047861
    Abstract: A power conversion device includes: a power converter to perform output to an output line connected to a single-phase power system; and a control device to control the power converter so it operates as a virtual synchronous generator. The control device includes: a voltage and current measurer to obtain, from a single-phase system voltage, an angular velocity and a phase of the system voltage by an estimation operation that uses the phase of the system voltage as a parameter; a power obtainer to obtain active power and reactive power; a governor model to calculate a phase difference; an AVR model to calculate an absolute value of an induced voltage of a virtual synchronous generator; a generator model to calculate current command values corresponding to an armature current of the virtual synchronous generator; and a current controller to generate and output a PWM signal to the power converter.
    Type: Application
    Filed: February 16, 2015
    Publication date: February 16, 2017
    Applicant: KAWASAKI JUKOGYO KABUSHIKI KAISHA
    Inventors: Kenichi SAKIMOTO, Yuko HIRASE, Eiji YOSHIMURA, Shogo KATSURA, Hidehiko NAKAGAWA, Osamu NORO, Yuji SHINDO
  • Patent number: 9356448
    Abstract: The present invention provides an electric power converting unit that does not require a change in a control method in, for example, system interconnection by calculating a target value of an output current of an electric power converter from an internal phase angle calculated from an active electric power control loop and an internal electromotive voltage calculated from a reactive electric power control loop. Thus, a stand-alone power supply system that is easy to handle can be configured.
    Type: Grant
    Filed: July 4, 2012
    Date of Patent: May 31, 2016
    Assignee: KAWASAKI JUKOGYO KABUSHIKI KAISHA
    Inventors: Kazushige Sugimoto, Masahide Kawamura, Kentaro Sakata, Mitsuchika Ogawa, Kentaro Tsuda, Takefumi Iizaka, Yuko Hirase
  • Publication number: 20150357820
    Abstract: A first internal phase difference angle calculator for integrating a deviation between a first frequency command value and a frequency obtained by frequency obtaining device to calculate a first internal phase difference angle, a first internal electromotive voltage command value calculator for proportioning and calculating a deviation between a first reactive power command value and a reactive power obtained based on the value measured by first measuring device, and adding a reference voltage to the deviation so as to calculate a first internal electromotive voltage command value, and a first current command value calculator for calculating a command value of an output current from a first power converter based on the first internal phase difference angle, the first internal electromotive voltage command value, and a voltage measured by the voltage measuring device. The apparatus controls the first power converter based on an output from the first current command value calculator.
    Type: Application
    Filed: December 5, 2013
    Publication date: December 10, 2015
    Inventors: Kazushige SUGIMOTO, Masahide KAWAMURA, Kentaro SAKATA, Mitsuchika OGAWA, Kentaro TSUDA, Takefumi IIZAKA, Yuko HIRASE
  • Publication number: 20140152110
    Abstract: The present invention provides an electric power converting unit that does not require a change in a control method in, for example, system interconnection by calculating a target value of an output current of an electric power converter from an internal phase angle calculated from an active electric power control loop and an internal electromotive voltage calculated from a reactive electric power control loop. Thus, a stand-alone power supply system that is easy to handle can be configured.
    Type: Application
    Filed: July 4, 2012
    Publication date: June 5, 2014
    Applicant: KAWASAKI JUKOGYO KABUSHIKI KAISHA
    Inventors: Kazushige Sugimoto, Masahide Kawamura, Kentaro Sakata, Mitsuchika Ogawa, Kentaro Tsuda, Takefumi Iizaka, Yuko Hirase
  • Patent number: 6308195
    Abstract: A 4-2 compressor circuit calculates the sum of first through fourth inputs and a carry input applied thereto and for furnishing the summation result and first and second carries generated during the calculation of the summation. An input value converting unit inverts the third and fourth inputs only if the third input is logic 0 and the fourth input is logic 1. A summation unit calculates the logical exclusive OR of any two of the first through fourth inputs and the carry input applied to the 4-2 compressor circuit, the logical exclusive OR of any two of the first logical exclusive OR and the remaining three inputs, the logical exclusive OR of any two of the second logical exclusive OR and the remainder, and the logical exclusive OR of the third logical exclusive OR and the remainder. The summation unit then furnishes the fourth logical exclusive OR as the summation result. A carry calculating unit calculates the first carry from the first, third, and fourth inputs.
    Type: Grant
    Filed: February 11, 1999
    Date of Patent: October 23, 2001
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Yuko Hirase, Katsunori Sawai