Patents by Inventor Kazuyoshi SHIMADA

Kazuyoshi SHIMADA 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).

  • System interconnecting facility
    Patent number: 10714936
    Abstract: A system interconnecting facility is connected to a power system, and includes a plurality of power converters connected to the power system, a plurality of transformers provided between the power system and the power converters, a plurality of switches provided between the transformers and the power converters, and a controller that controls the opening and closing of the switch. The controller outputs, to the switches, open and close commands in so that the number of closed switches is out of a closed switch number range where a harmonic voltage of the system interconnecting facility increases, based on a harmonic voltage containing rate characteristic that is a relation between the number of closed switches and a harmonic voltage containing rate of the system interconnecting facility. The system interconnecting facility is capable of suppressing a harmonic voltage even if a circuit structure differs depending on a situation.
    Type: Grant
    Filed: February 25, 2016
    Date of Patent: July 14, 2020
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Energy Systems & Solutions Corporation
    Inventors: Masayuki Kubota, Tsutomu Tanno, Mami Mizutani, Shinya Naoi, Masako Kiuchi, Midori Otsuki, Kazuyoshi Shimada
  • SYSTEM INTERCONNECTING FACILITY
    Publication number: 20190052079
    Abstract: A system interconnecting facility is connected to a power system, and includes a plurality of power converters connected to the power system, a plurality of transformers provided between the power system and the power converters, a plurality of switches provided between the transformers and the power converters, and a controller that controls the opening and closing of the switch. The controller outputs, to the switches, open and close commands in so that the number of closed switches is out of a closed switch number range where a harmonic voltage of the system interconnecting facility increases, based on a harmonic voltage containing rate characteristic that is a relation between the number of closed switches and a harmonic voltage containing rate of the system interconnecting facility. The system interconnecting facility is capable of suppressing a harmonic voltage even if a circuit structure differs depending on a situation.
    Type: Application
    Filed: February 25, 2016
    Publication date: February 14, 2019
    Applicants: Kabushiki Kaisha Toshiba, Toshiba Energy Systems & Solutions Corporation
    Inventors: Masayuki KUBOTA, Tsutomu TANNO, Mami MIZUTANI, Shinya NAOI, Masako KIUCHI, Midori OTSUKI, Kazuyoshi SHIMADA