Patents by Inventor Norihiro IYANAGA
Norihiro IYANAGA 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: 11048239Abstract: A control parameter optimizing system and an operation optimizing apparatus equipped therewith are provided, the system being applicable to an existing plant without modifying the control panel or equipment of the plant, the system further being capable of optimizing the operation control of the plant in accordance with diverse operational requirements. The system includes an objective function setting section, a plant model, and a control parameter optimizing section. The control parameter optimizing section includes an optimization control parameter selecting section and an optimization control parameter adjusting section. The optimization control parameter selecting section selects as an optimization control parameter the control parameter for optimizing an objective function based on control logic information extracted from a power plant.Type: GrantFiled: July 17, 2019Date of Patent: June 29, 2021Assignee: Mitsubishi Power, Ltd.Inventors: Yasuhiro Yoshida, Takuya Yoshida, Takaaki Sekiai, Yuya Tokuda, Kazunori Yamanaka, Atsushi Yamashita, Norihiro Iyanaga
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Patent number: 10732595Abstract: Provided is a control parameter automatic-adjustment apparatus that adjusts a control parameter which is used when a control apparatus of a plant calculates an operational control signal, the apparatus including: a simulator that simulates operation of the plant; a learning unit that searches for an optimal control parameter using the simulator; and a knowledge database that stores knowledge information which associates an amount of change in the control parameter with an amount of change in a state of the plant, in which the learning unit includes a search range determination unit that determines a control parameter search range based on the knowledge information that is stored in the knowledge database.Type: GrantFiled: January 30, 2017Date of Patent: August 4, 2020Assignee: Mitsubishi Hitachi Power Systems, Ltd.Inventors: Yuya Tokuda, Takaaki Sekiai, Yasuhiro Yoshida, Takuya Yoshida, Kazunori Yamanaka, Norihiro Iyanaga, Fumiyuki Suzuki
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Publication number: 20190339677Abstract: A control parameter optimizing system and an operation optimizing apparatus equipped therewith are provided, the system being applicable to an existing plant without modifying the control panel or equipment of the plant, the system further being capable of optimizing the operation control of the plant in accordance with diverse operational requirements. The system includes an objective function setting section, a plant model, and a control parameter optimizing section. The control parameter optimizing section includes an optimization control parameter selecting section and an optimization control parameter adjusting section. The optimization control parameter selecting section selects as an optimization control parameter the control parameter for optimizing an objective function based on control logic information extracted from a power plant.Type: ApplicationFiled: July 17, 2019Publication date: November 7, 2019Inventors: Yasuhiro YOSHIDA, Takuya YOSHIDA, Takaaki SEKIAI, Yuya TOKUDA, Kazunori YAMANAKA, Atsushi YAMASHITA, Norihiro IYANAGA
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Patent number: 10394226Abstract: A control parameter optimizing system and an operation optimizing apparatus equipped therewith are provided, the system being applicable to an existing plant without modifying the control panel or equipment of the plant, the system further being capable of optimizing the operation control of the plant in accordance with diverse operational requirements. The system includes an objective function setting section, a plant model, and a control parameter optimizing section. The control parameter optimizing section includes an optimization control parameter selecting section and an optimization control parameter adjusting section. The optimization control parameter selecting section selects as an optimization control parameter the control parameter for optimizing an objective function based on control logic information extracted from a power plant.Type: GrantFiled: June 28, 2016Date of Patent: August 27, 2019Assignee: Mitsubishi Hitachi Power Systems, Ltd.Inventors: Yasuhiro Yoshida, Takuya Yoshida, Takaaki Sekiai, Yuya Tokuda, Kazunori Yamanaka, Atsushi Yamashita, Norihiro Iyanaga
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Patent number: 10386826Abstract: To provide a start-up control device and a start-up control method for a power plant capable of changing the start-up completion estimated time to a desired time simply and safely while starting the power plant.Type: GrantFiled: July 21, 2016Date of Patent: August 20, 2019Assignee: Mitsubishi Hitachi Power Systems, Ltd.Inventors: Miyuki Kawata, Yasuhiro Yoshida, Takuya Yoshida, Tatsuro Yashiki, Eunkyeong Kim, Kazunori Yamanaka, Norihiro Iyanaga, Atsushi Yamashita
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Patent number: 10385736Abstract: There is provided a combined cycle power plant in which a high-pressure steam turbine and an intermediate-pressure steam turbine can operate in a state where amounts of thermal effect thereof are close to a limit value, and capable of reducing start-up time. A combined cycle power plant includes: an exhaust heat recovery boiler that includes a high-pressure superheater which superheats steam for a high-pressure steam turbine, and a reheater which reheats steam for an intermediate-pressure steam turbine; bypass pipes through which steam bypasses the high-pressure superheater and the reheater; bypass valves that regulate flow rates of steam which flows through the bypass pipes; and a bypass controller that controls the bypass valves such that a difference between thermal effect-amount margins of the turbines is decreased.Type: GrantFiled: July 20, 2016Date of Patent: August 20, 2019Assignee: Mitsubishi Hitachi Power Systems, Ltd.Inventors: Tatsuro Yashiki, Yasuhiro Yoshida, Takuya Yoshida, Miyuki Kawata, Eunkyeong Kim, Kazunori Yamanaka, Norihiro Iyanaga, Fumiyuki Suzuki
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Patent number: 10301974Abstract: An activation control apparatus permits activating a steam turbine safely at high speed in response to a power generation plant state. A heat source apparatus heats low-temperature fluid to generate high-temperature fluid, and steam generation equipment generates steam by thermal exchange with the high-temperature fluid. A steam turbine is driven by the steam, and an adjustment apparatus adjusts a plant operation amount. A thermal effect amount prediction calculation device calculates a prediction value for a thermal effect amount for use for activation control of the steam turbine, and a changeover device decides, based on a state value of the power generation plant, the sensitivity of the thermal effect amount to a variation of the plant operation amount and outputs a changeover signal in accordance with the sensitivity. Based on the changeover signal, an adjustment device calculates the plant operation amount so as not to exceed a predetermined limit value.Type: GrantFiled: June 28, 2016Date of Patent: May 28, 2019Assignee: Mitsubishi Hitachi Power Systems, Ltd.Inventors: Yasuhiro Yoshida, Takuya Yoshida, Tatsuro Yashiki, Kazunori Yamanaka, Fumiyuki Suzuki, Norihiro Iyanaga
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Patent number: 9863283Abstract: A steam turbine power plant includes a life consumption amount calculator configured to calculate life consumption amounts of a turbine rotor based on a value measured by a measurer, a thermal stress limit update timing determining device configured to determine a time when thermal stress limits are updated, an accumulated life consumption amount calculator configured to calculate accumulated life consumption amounts of the turbine rotor when the thermal stress limits are updated, a planned life consumption amount setting device configured to set planned life consumption amounts of the turbine rotor based on the accumulated life consumption amounts of the turbine rotor, a thermal stress limit calculator configured to calculate and update the thermal stress limits based on the planned life consumption amounts of the turbine rotor, and a plant command value calculator configured to calculate a plant command value based on the thermal stress limits.Type: GrantFiled: November 4, 2014Date of Patent: January 9, 2018Assignee: Mitsubishi Hitachi Power Systems, Ltd.Inventors: Tatsuro Yashiki, Yukinori Katagiri, Takuya Yoshida, Miyuki Kawata, Yasuhiro Yoshida, Eunkyeong Kim, Kenichiro Nomura, Kazunori Yamanaka, Fumiyuki Suzuki, Norihiro Iyanaga
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Patent number: 9771825Abstract: Provided is a steam turbine plant activation control device that can flexibly handle an initial state amount of a steam turbine plant and activate a steam turbine at a high speed. The activation control device 21 for the steam turbine plant includes a heat source device 1 configured to heat a low-temperature fluid using a heat source medium and generate a high-temperature fluid, a steam generator 2 for generating steam by thermal exchange with the high-temperature fluid, a steam turbine 3 to be driven by the steam, and adjusters 11, 12, 13, 14, 15 configured to adjust operation amounts of the plant.Type: GrantFiled: November 3, 2014Date of Patent: September 26, 2017Assignee: MITSUBISHI HITACHI POWER SYSTEMS, LTD.Inventors: Yasuhiro Yoshida, Takuya Yoshida, Tatsuro Yashiki, Yukinori Katagiri, Eunkyeong Kim, Kenichiro Nomura, Kazunori Yamanaka, Fumiyuki Suzuki, Norihiro Iyanaga
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Publication number: 20170254225Abstract: A steam turbine plant of the present invention includes a heat source device that heats a low temperature fluid by a heat source medium to obtain a high temperature fluid, a steam generating device that generates steam by heat exchange with the high temperature fluid, a steam turbine that is driven by the steam, a heating flow path that is disposed on an outer surface of a casing of the steam turbine, a high temperature fluid supply passage that is branched from a flow path of the high temperature fluid in the steam generating device, is connected to the heating flow path, and supplies the high temperature fluid to the heating flow path, and a high temperature fluid flow rate regulating device that regulates a flow rate of the high temperature fluid flowing through the high temperature fluid supply passage.Type: ApplicationFiled: January 27, 2017Publication date: September 7, 2017Inventors: Eunkyeong KIM, Yasuhiro YOSHIDA, Takuya YOSHIDA, Tatsuro YASHIKI, Miyuki KAWATA, Kazunori YAMANAKA, Norihiro IYANAGA, Fumiyuki SUZUKI
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Publication number: 20170255177Abstract: Provided is a control parameter automatic-adjustment apparatus that adjusts a control parameter which is used when a control apparatus of a plant calculates an operational control signal, the apparatus including: a simulator that simulates operation of the plant; a learning unit that searches for an optimal control parameter using the simulator; and a knowledge database that stores knowledge information which associates an amount of change in the control parameter with an amount of change in a state of the plant, in which the learning unit includes a search range determination unit that determines a control parameter search range based on the knowledge information that is stored in the knowledge database.Type: ApplicationFiled: January 30, 2017Publication date: September 7, 2017Inventors: Yuya TOKUDA, Takaaki SEKIAI, Yasuhiro YOSHIDA, Takuya YOSHIDA, Kazunori YAMANAKA, Norihiro IYANAGA, Fumiyuki SUZUKI
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Publication number: 20170023933Abstract: To provide a start-up control device and a start-up control method for a power plant capable of changing the start-up completion estimated time to a desired time simply and safely while starting the power plant.Type: ApplicationFiled: July 21, 2016Publication date: January 26, 2017Inventors: Miyuki KAWATA, Yasuhiro YOSHIDA, Takuya YOSHIDA, Tatsuro YASHIKI, Eunkyeong KIM, Kazunori YAMANAKA, Norihiro IYANAGA, Atsushi YAMASHITA
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Publication number: 20170022847Abstract: There is provided a combined cycle power plant in which a high-pressure steam turbine and an intermediate-pressure steam turbine can operate in a state where amounts of thermal effect thereof are close to a limit value, and capable of reducing start-up time. A combined cycle power plant includes: an exhaust heat recovery boiler that includes a high-pressure superheater which superheats steam for a high-pressure steam turbine, and a reheater which reheats steam for an intermediate-pressure steam turbine; bypass pipes through which steam bypasses the high-pressure superheater and the reheater; bypass valves that regulate flow rates of steam which flows through the bypass pipes; and a bypass controller that controls the bypass valves such that a difference between thermal effect-amount margins of the turbines is decreased.Type: ApplicationFiled: July 20, 2016Publication date: January 26, 2017Inventors: Tatsuro YASHIKI, Yasuhiro YOSHIDA, Takuya YOSHIDA, Miyuki KAWATA, Eunkyeong KIM, Kazunori YAMANAKA, Norihiro IYANAGA, Fumiyuki SUZUKI
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Publication number: 20170002690Abstract: An object of the invention is to provide an activation control apparatus by which a steam turbine can be activated safely at a high speed in response to a state of a power generation plant.Type: ApplicationFiled: June 28, 2016Publication date: January 5, 2017Inventors: Yasuhiro YOSHIDA, Takuya YOSHIDA, Tatsuro YASHIKI, Kazunori YAMANAKA, Fumiyuki SUZUKI, Norihiro IYANAGA
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Publication number: 20170003676Abstract: A control parameter optimizing system and an operation optimizing apparatus equipped therewith are provided, the system being applicable to an existing plant without modifying the control panel or equipment of the plant, the system further being capable of optimizing the operation control of the plant in accordance with diverse operational requirements. The system includes an objective function setting section, a plant model, and a control parameter optimizing section. The control parameter optimizing section includes an optimization control parameter selecting section and an optimization control parameter adjusting section. The optimization control parameter selecting section selects as an optimization control parameter the control parameter for optimizing an objective function based on control logic information extracted from a power plant.Type: ApplicationFiled: June 28, 2016Publication date: January 5, 2017Inventors: Yasuhiro YOSHIDA, Takuya YOSHIDA, Takaaki SEKIAI, Yuya TOKUDA, Kazunori YAMANAKA, Atsushi YAMASHITA, Norihiro IYANAGA
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Publication number: 20150135712Abstract: A steam turbine plant activation control device is provided, which generates an activation schedule that enables a reduction in a time period required for the activation of a steam turbine plant without complex calculation such as prediction and calculation of a temperature and calculation of thermal stress.Type: ApplicationFiled: November 18, 2014Publication date: May 21, 2015Inventors: Eunkyeong KIM, Yasuhiro YOSHIDA, Tatsuro YASHIKI, Yukinori KATAGIRI, Takuya YOSHIDA, Kenichiro NOMURA, Kazunori YAMANAKA, Fumiyuki SUZUKI, Norihiro IYANAGA
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Publication number: 20150121874Abstract: Provided is a steam turbine plant activation control device that can flexibly handle an initial state amount of a steam turbine plant and activate a steam turbine at a high speed. The activation control device 21 for the steam turbine plant includes a heat source device 1 configured to heat a low-temperature fluid using a heat source medium and generate a high-temperature fluid, a steam generator 2 for generating steam by thermal exchange with the high-temperature fluid, a steam turbine 3 to be driven by the steam, and adjusters 11, 12, 13, 14, 15 configured to adjust operation amounts of the plant.Type: ApplicationFiled: November 3, 2014Publication date: May 7, 2015Inventors: Yasuhiro YOSHIDA, Takuya YOSHIDA, Tatsuro YASHIKI, Yukinori KATAGIRI, Eunkyeong KIM, Kenichiro NOMURA, Kazunori YAMANAKA, Fumiyuki SUZUKI, Norihiro IYANAGA
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Publication number: 20150121872Abstract: Providing a steam turbine power plant that can be safely activated at a high speed while maintaining thermal stress at a level equal to or lower than a limit in consideration of operational results of the plant, and a method for activating the steam turbine power plant.Type: ApplicationFiled: November 4, 2014Publication date: May 7, 2015Inventors: Tatsuro YASHIKI, Yukinori KATAGIRI, Takuya YOSHIDA, Miyuki KAWATA, Yasuhiro YOSHIDA, Eunkyeong KIM, Kenichiro NOMURA, Kazunori YAMANAKA, Fumiyuki SUZUKI, Norihiro IYANAGA