Patents by Inventor Takafumi Ebara
Takafumi Ebara 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: 9787094Abstract: A power demand regulation system has a power demand regulation device that regulates the load applied to equipment of an electrical power system by a load apparatus operating by means of power from the electrical power system, which supplies power to consumers. When regulating the load to the equipment, the power demand regulation device selects a load apparatus as the subject of a request for an alteration of operating state on the basis of by-apparatus load information, which is information of each load apparatus, and a regulation target value, which is the amount of load that is to be regulated, and, in the period from the start to the end of regulation, executes a plurality of times the outputting of an alteration request that requests the alteration of the operating state of the selected load apparatus.Type: GrantFiled: November 28, 2012Date of Patent: October 10, 2017Assignee: Hitachi, Ltd.Inventors: Hirotaka Takahashi, Yasushi Tomita, Ikuma Sugamata, Akira Kobayashi, Tsukasa Onishi, Takafumi Ebara
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Patent number: 9444288Abstract: If a failure has occurred on the backbone-power-transmission-network side, i.e., the electric-power system, and if the power supply to a power-distributing/transforming substation is stopped, a power-distributing feeder is cut off from the electric-power system. Moreover, a monitor/control apparatus transmits a single-operation-permitting permission signal to a distributed power-source system which is connected to the cut-off power-distributing feeder. Here, the distributed power-source system supplies its power to the power-distributing feeder only during a time-interval in which the system is receiving the permission signal. A general load and an important load, which are connected to the power-distributing feeder, find it possible to continue their activities by taking advantage of this power.Type: GrantFiled: September 14, 2012Date of Patent: September 13, 2016Assignee: Hitachi, Ltd.Inventors: Yasuo Sato, Takafumi Ebara, Masahiro Watanabe
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METHOD OF RECEIVING CHARGE, METHOD OF CONTROLLING CHARGE, CHARGE CONTROL UNIT AND CHARGING EQUIPMENT
Publication number: 20150326040Abstract: Charging equipment and a charge control unit are provided, in which a plurality of devices mounted with battery can be simultaneously charged by the single charging equipment. Further, a method of controlling charge and a method of receiving charge are also provided. The charging equipment supplies electric power to the battery for charging, comprising a power output part which outputs DC power used for charging, a plurality of user operation units which can be connected with a vehicle equipped with a battery as a device mounted with battery, and the charge control unit which controls a power supply from the power output part to the user operation unit. Herein, the charge control unit distributes the electric power outputted from the power output part to supply the distributed power to the user operation unit connected with the vehicle.Type: ApplicationFiled: July 22, 2015Publication date: November 12, 2015Applicant: HITACHI, LTD.Inventors: Shoji Kawai, Tomoyuki Marui, Masami Takahashi, Kazumi Rissen, Takafumi Ebara, Kei Yonezawa, Yoshihito Nasu -
Method of receiving charge, method of controlling charge, charge control unit and charging equipment
Patent number: 9168841Abstract: Charging equipment and a charge control unit are provided, in which a plurality of devices mounted with battery can be simultaneously charged by the single charging equipment. Further, a method of controlling charge and a method of receiving charge are also provided. The charging equipment supplies electric power to the battery for charging, comprising a power output part which outputs DC power used for charging, a plurality of user operation units which can be connected with a vehicle equipped with a battery as a device mounted with battery, and the charge control unit which controls a power supply from the power output part to the user operation unit. Herein, the charge control unit distributes the electric power outputted from the power output part to supply the distributed power to the user operation unit connected with the vehicle.Type: GrantFiled: May 18, 2011Date of Patent: October 27, 2015Assignee: HITACHI, LTD.Inventors: Shoji Kawai, Tomoyuki Marui, Masami Takahashi, Kazumi Rissen, Takafumi Ebara, Kei Yonezawa, Yoshihito Nasu -
Patent number: 9001480Abstract: A distributed energy resources control apparatus for controlling power from a distributed energy resource in a system section separable from a power system includes a detecting unit, a receiving unit, and a control unit. The detecting unit detects a fault of the power system. The receiving unit receives a signal indicating authorization for the distributed energy resource to perform independent operation as linking with the system section, when the system section is separated from the power system. The control unit controls a power converter converting power from the distributed energy resource and outputting to the system section, based on measurement results of a voltage and a frequency of the system section, when the fault is detected and the signal is received.Type: GrantFiled: February 19, 2013Date of Patent: April 7, 2015Assignee: Hitachi, Ltd.Inventors: Yasuo Sato, Takafumi Ebara, Masahiro Watanabe, Tsukasa Onishi
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Publication number: 20140327309Abstract: A power demand regulation system has a power demand regulation device that regulates the load applied to equipment of an electrical power system by a load apparatus operating by means of power from the electrical power system, which supplies power to consumers. When regulating the load to the equipment, the power demand regulation device selects a load apparatus as the subject of a request for an alteration of operating state on the basis of by-apparatus load information, which is information of each load apparatus, and a regulation target value, which is the amount of load that is to be regulated, and, in the period from the start to the end of regulation, executes a plurality of times the outputting of an alteration request that requests the alteration of the operating state of the selected load apparatus.Type: ApplicationFiled: November 28, 2012Publication date: November 6, 2014Inventors: Hirotaka Takahashi, Yasushi Tomita, Ikuma Sugamata, Akira Kobayashi, Tsukasa Onishi, Takafumi Ebara
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Patent number: 8560135Abstract: An energy management system includes an equipment data management unit which manages charging/discharging loss of a battery and heat radiation loss of an electric water heater, and causes a control unit to perform control to give priority based on the comparison to the energy storage facility more reducing loss and store energy. The energy management system includes a system operation calculation unit which predicts voltage distribution of the next day of a distribution system or demand-and-supply balance amount of the entire system by state monitoring data of a power system, calculates a demand amount increasing target value necessary for avoiding a photovoltaic power generation amount suppression on a consumer end by the voltage distribution of the next day of the distribution system or the demand-and-supply balance amount, and controls the energy storage facilities so as to satisfy the demand amount increasing target value on the consumer end.Type: GrantFiled: February 16, 2011Date of Patent: October 15, 2013Assignee: Hitachi, Ltd.Inventors: Yasushi Tomita, Masahiro Watanabe, Takafumi Ebara, Yuichi Otake, Akira Kobayashi, Hideyuki Kawamura
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Publication number: 20130258730Abstract: A distributed energy resources control apparatus for controlling power from a distributed energy resource in a system section separable from a power system includes a detecting unit, a receiving unit, and a control unit. The detecting unit detects a fault of the power system. The receiving unit receives a signal indicating authorization for the distributed energy resource to perform independent operation as linking with the system section, when the system section is separated from the power system. The control unit controls a power converter converting power from the distributed energy resource and outputting to the system section, based on measurement results of a voltage and a frequency of the system section, when the fault is detected and the signal is received.Type: ApplicationFiled: February 19, 2013Publication date: October 3, 2013Applicant: HITACHI, LTD.Inventors: Yasuo SATO, Takafumi EBARA, Masahiro WATANABE, Tsukasa ONISHI
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Publication number: 20130069447Abstract: If a failure has occurred on the backbone-power-transmission-network side, i.e., the electric-power system, and if the power supply to a power-distributing/transforming substation is stopped, a power-distributing feeder is cut off from the electric-power system. Moreover, a monitor/control apparatus transmits a single-operation-permitting permission signal to a distributed power-source system which is connected to the cut-off power-distributing feeder. Here, the distributed power-source system supplies its power to the power-distributing feeder only during a time-interval in which the system is receiving the permission signal. A general load and an important load, which are connected to the power-distributing feeder, find it possible to continue their activities by taking advantage of this power.Type: ApplicationFiled: September 14, 2012Publication date: March 21, 2013Applicant: HITACHI, LTD.Inventors: Yasuo SATO, Takafumi EBARA, Masahiro WATANABE
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METHOD OF RECEIVING CHARGE, METHOD OF CONTROLLING CHARGE, CHARGE CONTROL UNIT AND CHARGING EQUIPMENT
Publication number: 20110285345Abstract: Charging equipment and a charge control unit are provided, in which a plurality of devices mounted with battery can be simultaneously charged by the single charging equipment. Further, a method of controlling charge and a method of receiving charge are also provided. The charging equipment supplies electric power to the battery for charging, comprising a power output part which outputs DC power used for charging, a plurality of user operation units which can be connected with a vehicle equipped with a battery as a device mounted with battery, and the charge control unit which controls a power supply from the power output part to the user operation unit. Herein, the charge control unit distributes the electric power outputted from the power output part to supply the distributed power to the user operation unit connected with the vehicle.Type: ApplicationFiled: May 18, 2011Publication date: November 24, 2011Inventors: Shoji Kawai, Tomoyuki Marui, Masami Takahashi, Kazumi Rissen, Takafumi Ebara, Kei Yonezawa, Yoshihito Nasu -
Publication number: 20110238232Abstract: An energy management system includes an equipment data management unit which manages charging/discharging loss of a battery and heat radiation loss of an electric water heater, and causes a control unit to perform control to give priority based on the comparison to the energy storage facility more reducing loss and store energy. The energy management system includes a system operation calculation unit which predicts voltage distribution of the next day of a distribution system or demand-and-supply balance amount of the entire system by state monitoring data of a power system, calculates a demand amount increasing target value necessary for avoiding a photovoltaic power generation amount suppression on a consumer end by the voltage distribution of the next day of the distribution system or the demand-and-supply balance amount, and controls the energy storage facilities so as to satisfy the demand amount increasing target value on the consumer end.Type: ApplicationFiled: February 16, 2011Publication date: September 29, 2011Inventors: Yasushi TOMITA, Masahiro Watanabe, Takafumi Ebara, Yuichi Otake, Akira Kobayashi, Hideyuki Kawamura