Patents Assigned to Tokyo Electric Power Company, Incorporated
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Publication number: 20170177016Abstract: A smart power flow solver integrates the TRUST-TECH based power flow methodology into a power flow solution. A first solver is applied to a power flow problem of a power system. If results of the first solver diverge, A Trust-Tech based solver is applied to the power flow problem by: transforming the power flow problem to an unconstrained global optimization problem; iteratively solving a dynamical system associated with the unconstrained global optimization problem; and determining whether a solution exists for the power flow problem based on whether the iteratively solving of the dynamical system converges. If a solution exists for the power flow problem, a second solver is then applied to the power flow problem. An operating state of the power system is generated based on results of the second solver to enable proper operation of the power system.Type: ApplicationFiled: December 21, 2015Publication date: June 22, 2017Applicants: Bigwood Technology, Inc., Tokyo Electric Power Company, IncorporatedInventors: Hsiao-Dong Chiang, Bin Wang, Tao Wang, Ryuya Tanabe
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Patent number: 9625191Abstract: The condensing apparatus 71 includes: a compressor 10 which has a compression part 20 compressing a working fluid; a condenser 13 which condenses the working fluid compressed by the compression part 20; and a spray mechanism 81 including a nozzle 82 which sprays a cooling fluid into a fluid passage 91 to cool the working fluid flowing through the fluid passage 91 between a discharge opening CS2 of the compression part 20 and an inlet 13a of the condenser 13.Type: GrantFiled: April 13, 2012Date of Patent: April 18, 2017Assignees: Tokyo Electric Power Company, Incorporated, Chubu Electric Power Company, Incorporated, THE KANSAI ELECTRIC POWER CO., INC., Kobe Steel, Ltd., DANISH TECHNOLOGICAL INSTITUTE, JOHNSON CONTROLS DENMARK APSInventors: Ryo Fujisawa, Masatake Toshima, Yoshihiro Nakayama, Yoshitaka Baba, Satoshi Ide, Koichiro Iizuka, Kunihiko Suto, Hiroshi Egawa, Ichirou Sakuraba, Daisuke Hayashi, Keiji Sugano, Hans Madsboll, Klaus Damgaard Kristensen
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Patent number: 9494154Abstract: The refrigerator includes: a cooling-water line having a cooling-water pump to thereby send water for cooling a refrigerant inside of a condenser; a lubricating-water supply line connecting the part downstream from the cooling-water pump on the cooling-water line and a compressor 4 and supplying water flowing through the cooling-water line as a lubricant to the compressor 4; and a backup portion supplying water to the lubricating-water supply line instead of supplying water from the cooling-water line when the cooling-water pump is not driven.Type: GrantFiled: March 15, 2011Date of Patent: November 15, 2016Assignees: Tokyo Electric Power Company, Incorporated, Chubu Electric Power Company, Incorporated, THE KANSAI ELECTRIC POWER CO., INC., KABUSHI KAISHA KOBE SEIKO SHO, DANISH TECHNOLOGICAL INSTITUTE, JOHNSON CONTROLS DENMARK APSInventors: Ryo Fujisawa, Masatake Toshima, Toshikatsu Kanemura, Yoshihiro Nakayama, Koichiro Iizuka, Satoshi Ide, Kunihiko Suto, Kazutaka Kurashige, Ichirou Sakuraba, Daisuke Hayashi, Keiji Sugano, Shinji Shato, Hans Madsboll, Klaus Damgaard Kristensen
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Patent number: 9243419Abstract: A rod portion is coupled to a support wire at one end thereof and is rotatably coupled to a base portion of the anchor body portion. The anchor body portion includes the resistance plate body, an inner reinforcing plate, and an outer reinforcing plate, a first hitting portion is provided on the outer reinforcing plate, and a second hitting portion to be hit next to the first hitting portion is provided at a position higher than the first hitting portion.Type: GrantFiled: December 10, 2014Date of Patent: January 26, 2016Assignees: Tokyo Electric Power Company, Incorporated, Iwabuchi CorporationInventors: Yuya Niidome, Mitsuhiro Kuwabara
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Patent number: 9239164Abstract: A slag monitoring device 100 for a coal gasifier includes a slag hole camera 11 that observes a slag hole 3 from which molten slag flows out, a water surface camera 12 that observes a situation in which the slag flowing out from the slag hole 3 falls onto a water surface 5H of cooling water 5, a falling sound sensor 13 that observes a sound of the slag falling onto the water surface 5H, and a processing device 20 that determines a solidification and adhesion position of the slag based on an opening area of the slag hole 3 observed by the slag hole camera 11 and falling lines and falling positions of the slag observed by the water surface camera.Type: GrantFiled: September 17, 2010Date of Patent: January 19, 2016Assignees: MITSUBISHI HITACHI POWER SYSTEMS, LTD., HOKKAIDO ELECTRIC POWER COMPANY, INCORPORATED, TOHOKU ELECTRIC POWER CO., INC., THE TOKYO ELECTRIC POWER COMPANY, INCORPORATED, CHUBU ELECTRIC POWER CO., INC., HOKURIKU ELECTRIC POWER COMPANY, THE KANSAI ELECTRIC POWER CO., INC., THE CHUGOKU ELECTRIC POWER CO., INC., SHIKOKU ELECTRIC POWER CO., INC., KYUSHU ELECTRIC POWER CO., INC., ELECTRIC POWER DEVELOPMENT CO., LTD., CENTRAL RESEARCH INSTITUTE OF ELECTRIC POWER INDUSTRY, JOBAN JOINT POWER CO., LTD.Inventors: Masami Iida, Yoshinori Koyama, Katsuhiko Yokohama, Naoki Suganuma, Mutsuaki Taguchi
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Patent number: 9219364Abstract: A public power supply system makes it possible to use power in a public location both conveniently and safely without erroneous operations. An outlet, to which power is supplied from a distribution line, is installed in advance in a predetermined public location and a communication terminal requesting the outlet to supply power and a center server are connected in advance via an Internet and when there is a request to the outlet to supply power, the center server outputs a current supply command to a current control unit via a communication network (Internet or telephone network) and the current control unit permits supply of a current to be supplied to the outlet when there is a current supply command and there is information to allow supply of a current to the outlet generated using a remote control prevention device installed near the outlet.Type: GrantFiled: March 14, 2011Date of Patent: December 22, 2015Assignee: Tokyo Electric Power Company, IncorporatedInventors: Shota Tomiyama, Kengo Muraki, Masayuki Shigehara
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Patent number: 9206818Abstract: An axial flow compressor includes: an electric motor including a rotating shaft; a compression portion including a driving shaft connected without a speed-up gear to the rotating shaft of the electric motor and a rotor rotating together with the driving shaft, the compression portion driving the driving shaft and thereby compressing a working fluid; and a velocity reducing portion having a space for reducing the flow velocity of a working fluid discharged from a discharge opening of the compression portion. The rotating shaft of the electric motor is connected to the end of the driving shaft on the side of the discharge opening; and the velocity reducing portion is disposed so as to surround the electric motor.Type: GrantFiled: March 15, 2011Date of Patent: December 8, 2015Assignees: Tokyo Electric Power Company, Incorporated, Chuba Electric Power Company, Incorporated, THE KANSAI ELECTRIC POWER CO., INC., KABUSHIKI KAISHA KOBE SEIKO SHO, DANISH TECHNOLOGICAL INSTITUTE, JOHNSON CONTROLS DENMARK APSInventors: Yoshihiro Nakayama, Yoshitaka Baba, Satoshi Ide, Koichiro Iizuka, Ryo Fujisawa, Masatake Toshima, Kunihiko Suto, Kazutaka Kurashige, Hiroshi Egawa, Ichirou Sakuraba, Daisuke Hayashi, Keiji Sugano, Svend Rasmussen, Ziad Al-Janabi, Finn Jensen, Lars Bay Moller, Hans Madsboll, Christian Svarregaard-Jensen, Klaus Damgaard Kristensen
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Patent number: 9188135Abstract: An axial flow compressor includes: a rotor having a rotor vane; a first pressing member joined to one end surface of the rotor; a second pressing member joined to the other end surface of the rotor; a rotor shaft portion penetrating the first pressing member, the rotor and the second pressing member; and a nut which fixes the first pressing member and the second pressing member on the rotor shaft portion with the first pressing member and the second pressing member holding the rotor between. The rotor shaft portion is made of a material having a lower linear expansion coefficient than that of a material making at least a part of the rotor. The material making at least a part of the rotor may be aluminum or aluminum alloy.Type: GrantFiled: March 15, 2011Date of Patent: November 17, 2015Assignees: Tokyo Electric Power Company, Incorporated, Chubu Electric Power Company, Incorporated, THE KANSAI ELECTRIC POWER CO., INC., KABUSHIKI KAISHA KOBE SEIKO SHO, DANISH TECHNOLOGICAL INSTITUTE, JOHNSON CONTROLS DENMARK APSInventors: Yoshihiro Nakayama, Yoshitaka Baba, Satoshi Ide, Koichiro Iizuka, Ryo Fujisawa, Masatake Toshima, Kunihiko Suto, Kazutaka Kurashige, Ichirou Sakuraba, Daisuke Hayashi, Keiji Sugano, Svend Rasmussen, Ziad Al-Janabi, Finn Jensen, Lars Bay Moller, Hans Madsboll, Christian Svarregaard-Jensen, Klaus Damgaard Kristensen
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Publication number: 20150322689Abstract: A rod portion is coupled to a support wire at one end thereof and is rotatably coupled to a base portion of the anchor body portion. The anchor body portion includes the resistance plate body, an inner reinforcing plate, and an outer reinforcing plate, a first hitting portion is provided on the outer reinforcing plate, and a second hitting portion to be hit next to the first hitting portion is provided at a position higher than the first hitting portion.Type: ApplicationFiled: December 10, 2014Publication date: November 12, 2015Applicants: TOKYO ELECTRIC POWER COMPANY, INCORPORATED, IWABUCHI CORPORATIONInventors: Yuya NIIDOME, Mitsuhiro KUWABARA
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Patent number: 8997665Abstract: A leading end located in a two-stage entrained-flow bed coal gasifier has a double-walled structure including an outer cylinder and an inner cylinder, and cooling water for cooling the leading end is supplied through an interior of the inner cylinder to cool the leading end and is then returned to a base end through a space formed between the outer cylinder and the inner cylinder. The space formed between the outer cylinder and the inner cylinder has a smaller channel area than the interior of the inner cylinder, and a swirling flow along a guide formed on an outer circumferential surface of the inner cylinder and a substantially linear flow in a longitudinal direction of the outer cylinder and the inner cylinder are applied to the cooling water returned to the base end through the space formed between the outer cylinder and the inner cylinder.Type: GrantFiled: October 5, 2009Date of Patent: April 7, 2015Assignees: Mitsubishi Hitachi Power Systems, Ltd., Joban Joint Power Co., Ltd., Hokkaido Electric Power Company, Incorporated, Tohoku Electric Power Co., Inc., The Tokyo Electric Power Company, Incorporated, Chubu Electric Power Co. Inc., Hokuriku Electric Power Company, The Kansai Electric Power Co., Inc., The Chugoku Electric Power Co., Inc., Shikoku Electric Power Co., Inc., Kyushu Electric Power Co., Inc., Electric Power Development Co., Ltd., Central Research Institute of Electric Power IndustryInventors: Shinya Hamasaki, Toshimi Ohtsuka, Yoshinori Koyama, Katsuhiko Yokohama, Yasunari Shibata, Jun Kasai
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Patent number: 8731131Abstract: In a method of reducing corrosion of a material constituting a nuclear reactor structure, an electrochemical corrosion potential is controlled by injecting a solution or a suspension containing a substance generating an excitation current by an action of at least one of radiation, light, and heat existing in a nuclear reactor, or a metal or a metallic compound forming the substance generating the excitation current under the condition in the nuclear reactor to allow the substance generating the excitation current to adhere to the surface of the nuclear reactor structural material, and by injecting hydrogen in cooling water of the nuclear reactor while controlling the hydrogen concentration in a feed water.Type: GrantFiled: September 14, 2012Date of Patent: May 20, 2014Assignees: Kabushiki Kaisha Toshiba, Ishikawajima-Harima Heavy Industries Co., Ltd., The Tokyo Electric Power Company, IncorporatedInventors: Seiji Yamamoto, Tadasu Yotsuyanagi, Nagayoshi Ichikawa, Tetsuo Oosato, Masato Okamura, Junichi Takagi, Kenji Yamazaki, Shunichi Suzuki, Kenro Takamori, Mitsuru Sambongi, Takeshi Shibano, Takashi Hirano, Yuichi Fukaya
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Patent number: 8731132Abstract: In a nuclear power plant, a corrosion-resistant oxide film on a surface of the metal component of a reactor structure is exposed to a high-temperature water, the corrosion-resistant oxide film containing an oxide having a property of a P-type semiconductor, and a catalytic substance having a property of an N-type semiconductor is deposited on the oxide film. The oxide film maintains the property of the P-type semiconductor.Type: GrantFiled: January 31, 2012Date of Patent: May 20, 2014Assignees: Kabushiki Kaisha Toshiba, The Tokyo Electric Power Company, IncorporatedInventors: Masato Okamura, Tetsuo Oosato, Seiji Yamamoto, Tadasu Yotsuyanagi, Nagayoshi Ichikawa, Kenji Yamazaki, Junichi Takagi, Hidehiro Urata, Shunichi Suzuki, Kenro Takamori, Junichi Suzuki
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Patent number: 8681925Abstract: In a nuclear power plant, a corrosion-resistant oxide film on a surface of the metal component of a reactor structure is exposed to a high-temperature water, the corrosion-resistant oxide film containing an oxide having a property of a P-type semiconductor, and a catalytic substance having a property of an N-type semiconductor is deposited on the oxide film. The oxide film maintains the property of the P-type semiconductor.Type: GrantFiled: January 31, 2012Date of Patent: March 25, 2014Assignees: Kabushiki Kaisha Toshiba, The Tokyo Electric Power Company, IncorporatedInventors: Masato Okamura, Tetsuo Oosato, Seiji Yamamoto, Tadasu Yotsuyanagi, Nagayoshi Ichikawa, Kenji Yamazaki, Junichi Takagi, Hidehiro Urata, Shunichi Suzuki, Kenro Takamori, Junichi Suzuki
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Publication number: 20130070888Abstract: In a method of reducing corrosion of a material constituting a nuclear reactor structure, an electrochemical corrosion potential is controlled by injecting a solution or a suspension containing a substance generating an excitation current by an action of at least one of radiation, light, and heat existing in a nuclear reactor, or a metal or a metallic compound forming the substance generating the excitation current under the condition in the nuclear reactor to allow the substance generating the excitation current to adhere to the surface of the nuclear reactor structural material, and by injecting hydrogen in cooling water of the nuclear reactor while controlling the hydrogen concentration in a feed water.Type: ApplicationFiled: September 14, 2012Publication date: March 21, 2013Applicants: KABUSHIKI KAISHA TOSHIBA, THE TOKYO ELECTRIC POWER COMPANY, INCORPORATED, ISHIKAWAJIMA-HARIMA HEAVY INDUSTRIES CO., LTD.Inventors: Seiji YAMAMOTO, Tadasu Yotsuyanagi, Nagayoshi Ichikawa, Tetsuo Oosato, Masato Okamura, Junichi Takagi, Kenji Yamazaki, Shunichi Suzuki, Kenro Takamori, Mitsuru Sambongi, Takeshi Shibano, Takashi Hirano, Yuichi Fukaya
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Publication number: 20130022474Abstract: An axial flow compressor includes: a rotor having a rotor vane; a first pressing member joined to one end surface of the rotor; a second pressing member joined to the other end surface of the rotor; a rotor shaft portion penetrating the first pressing member, the rotor and the second pressing member; and a nut which fixes the first pressing member and the second pressing member on the rotor shaft portion with the first pressing member and the second pressing member holding the rotor between. The rotor shaft portion is made of a material having a lower linear expansion coefficient than that of a material making at least a part of the rotor. The material making at least a part of the rotor may be aluminum or aluminum alloy.Type: ApplicationFiled: March 15, 2011Publication date: January 24, 2013Applicants: Tokyo Electric Power Company, Incorporated, Chubu Electric Power Company, Incorporated, JOHNSON CONTROLS DENMARK APS, KABUSHIKI KAISHA KOBE SEIKO SHO, DANISH TECHNOLOGICAL INSTITUTE, THE KANSAI ELECTRIC POWER CO., INC.Inventors: Yoshihiro Nakayama, Yoshitaka Baba, Satoshi Ide, Koichiro Iizuka, Ryo Fujisawa, Masatake Toshima, Kunihiko Suto, Kazutaka Kurashige, Ichirou Sakuraba, Daisuke Hayashi, Keiji Sugano, Svend Rasmussen, Ziad Al-Janabi, Finn Jensen, Lars Bay Moller, Hans Madsboll, Christian Svarregaard-Jensen, Klaus Damgaard Kristensen
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Publication number: 20130014537Abstract: The refrigerator includes: a cooling-water line having a cooling-water pump to thereby send water for cooling a refrigerant inside of a condenser; a lubricating-water supply line connecting the part downstream from the cooling-water pump on the cooling-water line and a compressor 4 and supplying water flowing through the cooling-water line as a lubricant to the compressor 4; and a backup portion supplying water to the lubricating-water supply line instead of supplying water from the cooling-water line when the cooling-water pump is not driven.Type: ApplicationFiled: March 15, 2011Publication date: January 17, 2013Applicants: TOKYO ELECTRIC POWER COMPANY, INCORPORATED, CHUBU ELECTRIC POWER COMPANY, INCORPORATED, JOHNSON CONTROLS DENMARK APS, KABUSHIKI KAISHA KOBE SEIKO SHO, DANISH TECHNOLOGICAL INSTITUTE, THE KANSAI ELECTRIC POWER CO., INC.Inventors: Ryo Fujisawa, Masatake Toshima, Toshikatsu Kanemura, Yashihiro Nakayama, Koichiro Iizuka, Satoshi Ide, Kunihiko Suto, Kazutaka Kurashige, Ichirou Sakuraba, Daisuke Hayashi, Keiji Sugano, Shinji Shato, Hans Madsboll, Klaus Damgaard Kristensen
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Publication number: 20130011280Abstract: An axial flow compressor includes: an electric motor including a rotating shaft; a compression portion including a driving shaft connected without a speed-up gear to the rotating shaft of the electric motor and a rotor rotating together with the driving shaft, the compression portion driving the driving shaft and thereby compressing a working fluid; and a velocity reducing portion having a space for reducing the flow velocity of a working fluid discharged from a discharge opening of the compression portion. The rotating shaft of the electric motor is connected to the end of the driving shaft on the side of the discharge opening; and the velocity reducing portion is disposed so as to surround the electric motor.Type: ApplicationFiled: March 15, 2011Publication date: January 10, 2013Applicants: TOKYO ELECTRIC POWER COMPANY, INCORPORATED, CHUBU ELECTRIC POWER COMPANY, INCORPORATED, JOHNSON CONTROLS DENMARK APS, KABUSHIKI KAISHA KOBE SEIKO SHO, DANISH TECHNOLOGICAL INSTITUTE, THE KANSAI ELECTRIC POWER CO., INC.Inventors: Yoshihiro Nakayama, Yoshitaka Baba, Satoshi Ide, Koichiro Iizuka, Ryo Fujisawa, Masatake Toshima, Kunihiko Suto, Kazutaka Kurashige, Hiroshi Egawa, Ichirou Sakuraba, Daisuke Hayashi, Keiji Sugano, Svend Rasmussen, Ziad Al-Janabi, Finn Jensen, Lars Bay Moller, Hans Madsboll, Christian Svarregaard-Jensen, Klaus Damgaard Kristensen
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Patent number: 8333086Abstract: In the condenser provided with two of the degassing chambers separated by a cooling fluid, communication between the degassing chambers is prevented even if a pressure difference is increased between the degassing chambers.Type: GrantFiled: November 20, 2008Date of Patent: December 18, 2012Assignees: The Tokyo Electric Power Company, Incorporated, Chubu Electric Power Co., Inc., Kansai Electric Power Co., Inc., Kobe Steel, Ltd., Danish Technological Institute, Johnson Controls Denmark APSInventors: Ryo Fujisawa, Kazuto Okada, Masatake Toshima, Yoshihiro Nakayama, Koichiro Iizuka, Satoshi Ide, Kunihiko Suto, Kazutaka Kurashige, Ichirou Sakuraba, Daisuke Hayashi, Shinji Shato, Masaki Ikeuchi, Hans Madsboll, Christian Svarregaard-Jensen
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Patent number: 8326589Abstract: In the present invention, in a case where a stable equilibrium point calculation is not calculable by using a Newton method, a damping factor of a mechanical system differential equation of a generator is set to be greater than an actual value of the generator of the power system. By applying pseudo-transient simulation to the nonlinear differential algebraic equation of the power system including the mechanical system differential equation of the generator, in which the damping factor is set, a norm of a mechanical system equation is found. If the found norm meets a predetermined condition, variable values of the power system at a time when the norm is found are set as initial values of the nonlinear differential algebraic equation of the power system. A stable equilibrium point is determined by applying the Newton method to the nonlinear differential algebraic equation in which the initial values are set.Type: GrantFiled: August 4, 2010Date of Patent: December 4, 2012Assignees: The Tokyo Electric Power Company, Incorporated, BIGWOOD SYSTEMS, IncorporatedInventors: Hsiao-Dong Chiang, Hua Li, Yasuyuki Tada, Ryuya Tanabe
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Patent number: 8320514Abstract: In a nuclear power plant, a corrosion-resistant oxide film on a surface of the metal component of a reactor structure is exposed to a high-temperature water, the corrosion-resistant oxide film containing an oxide having a property of a P-type semiconductor, and a catalytic substance having a property of an N-type semiconductor is deposited on the oxide film. The oxide film maintains the property of the P-type semiconductor.Type: GrantFiled: December 8, 2005Date of Patent: November 27, 2012Assignees: Kabushiki Kaisha Toshiba, The Tokyo Electric Power Company, IncorporatedInventors: Masato Okamura, Tetsuo Oosato, Seiji Yamamoto, Tadasu Yotsuyanagi, Nagayoshi Ichikawa, Kenji Yamazaki, Junichi Takagi, Hidehiro Urata, Shunichi Suzuki, Kenro Takamori, Junichi Suzuki