Patents by Inventor Shigeru Warashina

Shigeru Warashina 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).

  • Electric power system simulator
    Patent number: 5317525
    Abstract: An electric power system simulator comprising first calculator which calculates a generator dynamic characteristic, second calculator which calculates a load dynamic characteristic and third calculator which calculates power transmission condition of an electric power system network, then the first calculator cyclically obtains an amplitude and a phase of an internal induced voltage of the generator based on data on an output power and a terminal voltage of the generator, and the second calculator calculates a load equivalent admittance at predetermined time based on data on an A.C.
    Type: Grant
    Filed: March 5, 1991
    Date of Patent: May 31, 1994
    Assignees: Mitsubishi Denki Kabushiki Kaisha, The Tokyo Electric Power Co., Inc.
    Inventors: Hisao Taoka, Isao Iyoda, Hideo Noguchi, Yukio Kojima, Shigeru Warashina, Nobuyuki Sato