Patents by Inventor Jun Murakoshi

Jun Murakoshi 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).

  • Photovoltaic power generator output estimation method and device, and power system monitoring device using same
    Patent number: 10211777
    Abstract: The output of a photovoltaic power generator is estimated by estimating a solar radiation amount at a point different from solar radiation measurement points and determining an estimation error amount from solar radiation values measured at limited points. A photovoltaic power generator output estimation method estimates an output of a photovoltaic power generator based on a measured solar radiation value.
    Type: Grant
    Filed: January 14, 2015
    Date of Patent: February 19, 2019
    Assignees: Hitachi, Ltd., Tohoku Electric Power Co., Inc., Tohoku Electric Manufacturing Co., Ltd.
    Inventors: Masahiro Watanabe, Kenichiro Yamane, Takuya Matsumoto, Masatoshi Kumagai, Tsukasa Oonishi, Ryo Egashira, Katsuhiro Matsuda, Jun Murakoshi, Tomoya Sato
  • Voltage adjustment device for power distribution system, voltage adjusting method, and power control system
    Patent number: 9606554
    Abstract: A voltage adjustment device, a voltage adjusting method and a power control system for a distribution system are provided, in which the voltage adjustment device and a static var compensator are appropriately operated in a coordinated manner and the sustention of voltage and the enhancement of the operation efficiency are attained. A voltage adjustment device for a distribution system is installed in the distribution system including a static var compensator on an end side and controls a secondary voltage to be within a predetermined limit value by adjusting a tap position.
    Type: Grant
    Filed: July 24, 2013
    Date of Patent: March 28, 2017
    Assignees: Hitachi, Ltd., Tohoku Electric Power Co., Ltd., Tohoku Electric Manufacturing Co., Ltd.
    Inventors: Masahiro Watanabe, Ryo Egashira, Kenichiro Yamane, Katsuhiro Matsuda, Takafumi Futakami, Toshiyuki Seto, Jun Murakoshi
  • Photovoltaic Power Generator Output Estimation Method and Device, and Power System Monitoring Device Using Same
    Publication number: 20170012580
    Abstract: The output of a photovoltaic power generator is estimated by estimating a solar radiation amount at a point different from solar radiation measurement points and determining an estimation error amount from solar radiation values measured at limited points. A photovoltaic power generator output estimation method estimates an output of a photovoltaic power generator based on a measured solar radiation value.
    Type: Application
    Filed: January 14, 2015
    Publication date: January 12, 2017
    Inventors: Masahiro WATANABE, Kenichiro YAMANE, Takuya MATSUMOTO, Masatoshi KUMAGAI, Tsukasa OONISHI, Ryo EGASHIRA, Katsuhiro MATSUDA, Jun MURAKOSHI, Tomoya SATO
  • VOLTAGE ADJUSTMENT DEVICE FOR POWER DISTRIBUTION SYSTEM, VOLTAGE ADJUSTING METHOD, AND POWER CONTROL SYSTEM
    Publication number: 20150286227
    Abstract: A voltage adjustment device, a voltage adjusting method and a power control system for a distribution system are provided, in which the voltage adjustment device and a static var compensator are appropriately operated in a coordinated manner and the sustention of voltage and the enhancement of the operation efficiency are attained. A voltage adjustment device for a distribution system is installed in the distribution system including a static var compensator on an end side and controls a secondary voltage to be within a predetermined limit value by adjusting a tap position.
    Type: Application
    Filed: July 24, 2013
    Publication date: October 8, 2015
    Inventors: Masahiro Watanabe, Ryo Egashira, Kenichiro Yamane, Katsuhiro Matsuda, Takafumi Futakami, Toshiyuki Seto, Jun Murakoshi
  • Cable stayed suspension bridge making combined use of one-box and two-box girders
    Patent number: 7743444
    Abstract: A cable-stayed suspension bridge having characteristics of a cable stayed bridge and those of a suspension bridge at the same and time and using one-box and two-box girders in combination is disclosed. The bridge grinder of the cable-stayed suspension bridge includes one-box girders that each extend to both sides through the respective one tower and a two-box girder set in a central portion of the center span between towers in the length direction of the bridge girder. The cable-stayed suspension bridge includes cable-stayed structures in which a respective one of the one-box girders is supported by the tower with plural cables and a suspension structure in which the two-box girder is supported by the plural towers with two main cables and plural hanger ropes. The two-box girder has a central ventilation opening in the central portion as viewed in a transverse direction thereof.
    Type: Grant
    Filed: June 9, 2004
    Date of Patent: June 29, 2010
    Assignees: Incorporated Administrative Agency Public Works Research Institute, Honshu-Shikoku Bridge Expressway Company Limited, Incorporated Foundation Public Works Research Center, Kawasaki Jukogyo Kabushiki Kaisha, Kawada Industries, Inc., Sumitomo Heavy Industries, Ltd., Hitachi Zosen Corporation, Ishikawajima-Harima Heavy Industries Co., Ltd., JFE Engineering Corporation, Mitsui Engineering & Shipbuilding Co., Ltd., Mitsubishi Heavy Industries, Ltd.
    Inventors: Jun Murakoshi, Koichiro Fumoto, Hideki Shimodoi, Masao Miyazaki, Syuji Shirai, Masato Suzawa
  • Cable Stayed Suspension Bridge Making Combined Use of One-Box and Two-Box Girders
    Publication number: 20080313825
    Abstract: A cable-stayed suspension bridge having characteristics of a cable stayed bridge and those of a suspension bridge at the same and time and using one-box and two-box girders in combination is disclosed. The bridge grinder of the cable-stayed suspension bridge includes one-box girders that each extend to both sides through the respective one tower and a two-box girder set in a central portion of the center span between towers in the length direction of the bridge girder. The cable-stayed suspension bridge includes cable-stayed structures in which a respective one of the one-box girders is supported by the tower with plural cables and a suspension structure in which the two-box girder is supported by the plural towers with two main cables and plural hanger ropes. The two-box girder has a central ventilation opening in the central portion as viewed in a transverse direction thereof.
    Type: Application
    Filed: June 9, 2004
    Publication date: December 25, 2008
    Inventors: Jun Murakoshi, Koichiro Fumoto, Hideki Shimodoi, Masao Miyazaki, Syuji Shirai, Masato Suzawa