Patents by Inventor Toyohiro Akebi
Toyohiro Akebi 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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Publication number: 20210033025Abstract: In one embodiment, a plant control apparatus controls a power plant. The apparatus includes a gas turbine, an exhaust heat recovery boiler to generate main steam, a first steam turbine driven by first steam, and a first valve to supply the first steam to the first steam turbine. The plant further includes a reheater to generate reheat steam, a second steam turbine driven by second steam, and second and third valves to supply the second steam to the second steam turbine. The apparatus includes an acquisition module to acquire a setting value of total output of the first and second steam turbines, and a control module to adjust the total output to the setting value by controlling opening degrees of the first, second and third valves. The control module controls the second and third valves to different opening degrees when adjusting the total output to the setting value.Type: ApplicationFiled: July 30, 2020Publication date: February 4, 2021Applicants: KABUSHIKI KAISHA TOSHIBA, TOSHIBA ENERGY SYSTEMS & SOLUTIONS CORPORATIONInventors: Ibrahim ABDURRAHMAN, Masayuki TOBO, Toyohiro AKEBI, Yusuke FUKAMACHI
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Patent number: 10450900Abstract: In one embodiment, a plant control apparatus is configured to control a power generating plant that includes a gas turbine configured to be driven by a gas, an exhaust heat recovery boiler configured to generate steam by using heat of an exhaust gas from the gas turbine, a temperature reducing apparatus configured to cool, through a cooling medium, the steam generated by the exhaust heat recovery boiler, and a steam turbine configured to be driven by the steam cooled by the temperature reducing apparatus. The plant control apparatus includes an output controller configured to control output of the gas turbine, and a temperature reduction controller configured to control a cooling operation of the steam by the temperature reducing apparatus while the output controller controls the output of the gas turbine.Type: GrantFiled: December 12, 2016Date of Patent: October 22, 2019Assignee: KABUSHIKI KAISHA TOSHIBAInventors: Takayuki Iida, Masayuki Tobo, Toyohiro Akebi
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Patent number: 10378375Abstract: In one embodiment, a power generation planning support apparatus includes an acquiring module configured to acquire a physical quantity that represents a startup condition of a turbine. The apparatus further includes a first storage module configured to store first information that represents a relationship between a startup schedule of the turbine and the physical quantity. The apparatus further includes a predicting module configured to predict the startup schedule of the turbine, based on the physical quantity acquired by the acquiring module and the first information stored in the first storage module. The apparatus further includes an outputting module configured to output the startup schedule predicted by the predicting module.Type: GrantFiled: February 11, 2016Date of Patent: August 13, 2019Assignee: KABUSHIKI KAISHA TOSHIBAInventors: Tsukasa Takeuchi, Makoto Takahashi, Yoji Kubo, Masaki Katsumata, Toyohiro Akebi, Masaru Dejima, Keiko Shimizu, Dai Murayama, Shingo Tamaru
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Patent number: 10087786Abstract: In one embodiment, a combined cycle power plant includes first and second superheaters to generate first and second main steams, first and second reheaters to heat first and second discharge steams to generate first and second reheat steams, and a steam turbine to be supplied with the merged first and second reheat steams. The plant further includes a first valve to adjust a flow rate of the first discharge or reheat steam, and a second valve to adjust a flow rate of the second discharge or reheat steam. A plant control apparatus includes a determination module to determine a target opening degree of the second valve by using flow rates of the first and second main steams, and a controller to compare the determined target opening degree with a valve opening degree of the second valve and to control the second valve based on a comparison result.Type: GrantFiled: September 2, 2015Date of Patent: October 2, 2018Assignee: KABUSHIKI KAISHA TOSHIBAInventors: Hikaru Kiga, Masayuki Tobo, Toyohiro Akebi, Keiichi Nakamura
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Publication number: 20170183980Abstract: In one embodiment, a plant control apparatus is configured to control a power generating plant that includes a gas turbine configured to be driven by a gas, an exhaust heat recovery boiler configured to generate steam by using heat of an exhaust gas from the gas turbine, a temperature reducing apparatus configured to cool, through a cooling medium, the steam generated by the exhaust heat recovery boiler, and a steam turbine configured to be driven by the steam cooled by the temperature reducing apparatus. The plant control apparatus includes an output controller configured to control output of the gas turbine, and a temperature reduction controller configured to control a cooling operation of the steam by the temperature reducing apparatus while the output controller controls the output of the gas turbine.Type: ApplicationFiled: December 12, 2016Publication date: June 29, 2017Applicant: Kabushiki Kaisha ToshibaInventors: Takayuki IIDA, Masayuki TOBO, Toyohiro AKEBI
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Publication number: 20160247074Abstract: In one embodiment, a power generation planning support apparatus includes an acquiring module configured to acquire a physical quantity that represents a startup condition of a turbine. The apparatus further includes a first storage module configured to store first information that represents a relationship between a startup schedule of the turbine and the physical quantity. The apparatus further includes a predicting module configured to predict the startup schedule of the turbine, based on the physical quantity acquired by the acquiring module and the first information stored in the first storage module. The apparatus further includes an outputting module configured to output the startup schedule predicted by the predicting module.Type: ApplicationFiled: February 11, 2016Publication date: August 25, 2016Applicant: Kabushiki Kaisha ToshibaInventors: Tsukasa TAKEUCHI, Makoto TAKAHASHI, Yoji KUBO, Masaki KATSUMATA, Toyohiro AKEBI, Masaru DEJIMA, Keiko SHIMIZU, Dai MURAYAMA, Shingo TAMARU
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Publication number: 20160076404Abstract: In one embodiment, a combined cycle power plant includes first and second superheaters to generate first and second main steams, first and second reheaters to heat first and second discharge steams to generate first and second reheat steams, and a steam turbine to be supplied with the merged first and second reheat steams. The plant further includes a first valve to adjust a flow rate of the first discharge or reheat steam, and a second valve to adjust a flow rate of the second discharge or reheat steam. A plant control apparatus includes a determination module to determine a target opening degree of the second valve by using flow rates of the first and second main steams, and a controller to compare the determined target opening degree with a valve opening degree of the second valve and to control the second valve based on a comparison result.Type: ApplicationFiled: September 2, 2015Publication date: March 17, 2016Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Hikaru KIGA, Masayuki TOBO, Toyohiro AKEBI, Keiichi NAKAMURA
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Patent number: 8511093Abstract: A power generation plant comprises a plant control device (600) including two switchable control modes, i.e., a gas-turbine load control mode (7a) and a steam-turbine load control mode (7b). When the control is performed with the gas-turbine load control mode (7a), a fuel valve (104a) is controlled based on a load of a whole generator set (100), and a steam regulating valve (203a) is controlled based on an exhaust pressure of a steam turbine (202a). When the control is performed with the steam-turbine load control mode (7b), the fuel valve (104a) is controlled such that a valve opening degree thereof is maintained constant, and the steam regulating valve (203a) is controlled based on a load of the whole generator set (100).Type: GrantFiled: September 18, 2008Date of Patent: August 20, 2013Assignee: Kabushiki Kaisha ToshibaInventors: Haruo Oguchi, Toyohiro Akebi, Takeshi Koi, Takahiro Moribe
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Publication number: 20100275610Abstract: A power generation plant comprises a plant control device (600) including two switchable control modes, i.e., a gas-turbine load control mode (7a) and a steam-turbine load control mode (7b). When the control is performed with the gas-turbine load control mode (7a), a fuel valve (104a) is controlled based on a load of a whole generator set (100), and a steam regulating valve (203a) is controlled based on an exhaust pressure of a steam turbine (202a). When the control is performed with the steam-turbine load control mode (7b), the fuel valve (104a) is controlled such that a valve opening degree thereof is maintained constant, and the steam regulating valve (203a) is controlled based on a load of the whole generator set (100).Type: ApplicationFiled: September 19, 2008Publication date: November 4, 2010Inventors: Haruo Oguchi, Toyohiro Akebi, Takeshi Koi, Takahiro Moribe