Patents by Inventor Yasuhiko Ootsuki

Yasuhiko Ootsuki 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: 7117662
    Abstract: A gas turbine control system is disclosed which operates to stabilize the system frequency in a case of transitional variations of the system frequency without making the strength of hot gas path parts of the gas turbine below a maximum stress value of the hot gas path parts. When a system frequency abnormality is detected, the output of the gas turbine is adjusted to recover the system frequency by making a gas turbine combustion gas temperature control inoperative. For this purpose, there are provided a logical circuit operative to make the gas turbine combustion gas temperature control disabled or inoperative in response to an abnormal system frequency detection signal, and a recovery circuit that operates to cancel the inoperative state of the gas turbine combustion gas temperature control. The detection of an abnormal system frequency may be carried out by an outside signal. An abnormality detection unit may be provided in a combined cycle plant.
    Type: Grant
    Filed: May 16, 2006
    Date of Patent: October 10, 2006
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Kaiichirou Hirayama, Sayoko Kobayashi, legal representative, Yuka Kobayashi, legal representative, Hirokazu Kobayashi, legal representative, Tomoo Katauri, Yasuhiko Ootsuki, Takashi Mizuno, Tadashi Kobayashi, deceased
  • Publication number: 20060201132
    Abstract: A gas turbine control system is disclosed which operates to stabilize the system frequency in a case of transitional variations of the system frequency without making the strength of hot gas path parts of the gas turbine below a maximum stress value of the hot gas path parts. When a system frequency abnormality is detected, the output of the gas turbine is adjusted to recover the system frequency by making a gas turbine combustion gas temperature control inoperative. For this purpose, there are provided a logical circuit operative to make the gas turbine combustion gas temperature control disabled or inoperative in response to an abnormal system frequency detection signal, and a recovery circuit that operates to cancel the inoperative state of the gas turbine combustion gas temperature control. The detection of an abnormal system frequency may be carried out by an outside signal. An abnormality detection unit may be provided in a combined cycle plant.
    Type: Application
    Filed: May 16, 2006
    Publication date: September 14, 2006
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Kaiichirou Hirayama, Tadashi Kobayashi, Sayoko Kobayashi, Yuka Kobayashi, Hirokazu Kobayashi, Tomoo Katauri, Yasuhiko Ootsuki, Takashi Mizuno
  • Patent number: 7076940
    Abstract: A gas turbine control system is disclosed which operates to stabilize the system frequency in a case of transitional variations of the system frequency without making the strength of hot gas path parts of the gas turbine below a maximum stress value of the hot gas path parts. When a system frequency abnormality is detected, the output of the gas turbine is adjusted to recover the system frequency by making a gas turbine combustion gas temperature control inoperative. For this purpose, there are provided a logical circuit operative to make the gas turbine combustion gas temperature control disabled or inoperative in response to an abnormal system frequency detection signal, and a recovery circuit that operates to cancel the inoperative state of the gas turbine combustion gas temperature control. The detection of an abnormal system frequency may be carried out by an outside signal. An abnormality detection unit may be provided in a combined cycle plant.
    Type: Grant
    Filed: May 12, 2005
    Date of Patent: July 18, 2006
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Kaiichirou Hirayama, Sayoko Kobayashi, legal representative, Yuka Kobayashi, legal representative, Hirokazu Kobayashi, legal representative, Tomoo Katauri, Yasuhiko Ootsuki, Takashi Mizuno, Tadashi Kobayashi, deceased
  • Publication number: 20050204745
    Abstract: A gas turbine control system is disclosed which operates to stabilize the system frequency in a case of transitional variations of the system frequency without making the strength of hot gas path parts of the gas turbine below a maximum stress value of the hot gas path parts. When a system frequency abnormality is detected, the output of the gas turbine is adjusted to recover the system frequency by making a gas turbine combustion gas temperature control inoperative. For this purpose, there are provided a logical circuit operative to make the gas turbine combustion gas temperature control disabled or inoperative in response to an abnormal system frequency detection signal, and a recovery circuit that operates to cancel the inoperative state of the gas turbine combustion gas temperature control. The detection of an abnormal system frequency may be carried out by an outside signal. An abnormality detection unit may be provided in a combined cycle plant.
    Type: Application
    Filed: May 12, 2005
    Publication date: September 22, 2005
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Kaiichirou Hirayama, Tadashi Kobayashi, Sayoko Kobayashi, Yuka Kobayashi, Hirokazu Kobayashi, Tomoo Katauri, Yasuhiko Ootsuki, Takashi Mizuno
  • Patent number: 6945030
    Abstract: A gas turbine control system is disclosed which operates to stabilize the system frequency in a case of transitional variations of the system frequency without making the strength of hot gas path parts of the gas turbine below a maximum stress value of the hot gas path parts. When a system frequency abnormality is detected, the output of the gas turbine is adjusted to recover the system frequency by making a gas turbine combustion gas temperature control inoperative. For this purpose, there are provided a logical circuit operative to make the gas turbine combustion gas temperature control disabled or inoperative in response to an abnormal system frequency detection signal, and a recovery circuit that operates to cancel the inoperative state of the gas turbine combustion gas temperature control. The detection of an abnormal system frequency may be carried out by an outside signal. An abnormality detection unit may be provided in a combined cycle plant.
    Type: Grant
    Filed: May 20, 2003
    Date of Patent: September 20, 2005
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Kaiichirou Hirayama, Sayoko Kobayashi, Yuka Kobayashi, Hirokazu Kobayashi, Tomoo Katauri, Yasuhiko Ootsuki, Takashi Mizuno, Tadashi Kobayashi
  • Publication number: 20040055273
    Abstract: A gas turbine control system is disclosed which operates to stabilize the system frequency in a case of transitional variations of the system frequency without making the strength of hot gas path parts of the gas turbine below a maximum stress value of the hot gas path parts. When a system frequency abnormality is detected, the output of the gas turbine is adjusted to recover the system frequency by making a gas turbine combustion gas temperature control inoperative. For this purpose, there are provided a logical circuit operative to make the gas turbine combustion gas temperature control disabled or inoperative in response to an abnormal system frequency detection signal, and a recovery circuit that operates to cancel the inoperative state of the gas turbine combustion gas temperature control. The detection of an abnormal system frequency may be carried out by an outside signal. An abnormality detection unit may be provided in a combined cycle plant.
    Type: Application
    Filed: May 20, 2003
    Publication date: March 25, 2004
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Kaiichirou Hirayama, Tadashi Kobayashi, Sayoko Kobayashi, Yuka Kobayashi, Hirokazu Kobayashi, Tomoo Katauri, Yasuhiko Ootsuki, Takashi Mizuno