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).
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Patent number: 10770905Abstract: 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: GrantFiled: December 27, 2017Date of Patent: September 8, 2020Assignee: KAWASAKI JUKOGYO KABUSHIKI KAISHAInventors: Kazushige Sugimoto, Kenichi Sakimoto, Tomoyuki Hirai, Shogo Hamano, Shimpei Kobayashi, Yuko Hirase, Kensho Abe, Osamu Noro, Shogo Katsura, Eiji Yoshimura
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Publication number: 20190334352Abstract: 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: ApplicationFiled: December 27, 2017Publication date: October 31, 2019Applicant: KAWASAKI JUKOGYO KABUSHIKI KAISHAInventors: Kazushige SUGIMOTO, Kenichi SAKIMOTO, Tomoyuki HIRAI, Shogo HAMANO, Shimpei KOBAYASHI, Yuko HIRASE, Kensho ABE, Osamu NORO, Shogo KATSURA, Eiji YOSHIMURA
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Patent number: 9768712Abstract: 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: GrantFiled: February 16, 2015Date of Patent: September 19, 2017Assignee: KAWASAKI JUKOGYO KABUSHIKI KAISHAInventors: Kenichi Sakimoto, Yuko Hirase, Eiji Yoshimura, Shogo Katsura, Hidehiko Nakagawa, Osamu Noro, Yuji Shindo
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Patent number: 9698603Abstract: 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: GrantFiled: December 5, 2013Date of Patent: July 4, 2017Assignee: KAWASAKI JUKOGYO KABUSHIKI KAISHAInventors: Kazushige Sugimoto, Masahide Kawamura, Kentaro Sakata, Mitsuchika Ogawa, Kentaro Tsuda, Takefumi Iizaka, Yuko Hirase
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Publication number: 20170047861Abstract: 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: ApplicationFiled: February 16, 2015Publication date: February 16, 2017Applicant: KAWASAKI JUKOGYO KABUSHIKI KAISHAInventors: Kenichi SAKIMOTO, Yuko HIRASE, Eiji YOSHIMURA, Shogo KATSURA, Hidehiko NAKAGAWA, Osamu NORO, Yuji SHINDO
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Patent number: 9356448Abstract: 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: GrantFiled: July 4, 2012Date of Patent: May 31, 2016Assignee: KAWASAKI JUKOGYO KABUSHIKI KAISHAInventors: Kazushige Sugimoto, Masahide Kawamura, Kentaro Sakata, Mitsuchika Ogawa, Kentaro Tsuda, Takefumi Iizaka, Yuko Hirase
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Publication number: 20150357820Abstract: 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: ApplicationFiled: December 5, 2013Publication date: December 10, 2015Inventors: Kazushige SUGIMOTO, Masahide KAWAMURA, Kentaro SAKATA, Mitsuchika OGAWA, Kentaro TSUDA, Takefumi IIZAKA, Yuko HIRASE
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Publication number: 20140152110Abstract: 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: ApplicationFiled: July 4, 2012Publication date: June 5, 2014Applicant: KAWASAKI JUKOGYO KABUSHIKI KAISHAInventors: Kazushige Sugimoto, Masahide Kawamura, Kentaro Sakata, Mitsuchika Ogawa, Kentaro Tsuda, Takefumi Iizaka, Yuko Hirase
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Patent number: 6308195Abstract: 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: GrantFiled: February 11, 1999Date of Patent: October 23, 2001Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Yuko Hirase, Katsunori Sawai