Patents by Inventor Tsuyoshi Takazawa

Tsuyoshi Takazawa 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).

  • COMMUNICATION RELAY DEVICE, COMMUNICATION CONTROL METHOD, AND NON-TRANSITORY COMPUTER READABLE STORAGE MEDIUM
    Publication number: 20230188377
    Abstract: A communication relay device includes a plurality of LAN ports configured to connect to at least one communication terminal; a first communication unit configured to receive first information transmitted from the at least one communication terminal via the plurality of LAN ports; a processor; and a memory configured to store a program, the program being executed by the processor to cause the processor to: set a LAN (Local Area Network) interface among a plurality of LAN interfaces for each of the plurality of LAN ports; set a MAC address from a plurality of MAC addresses for each of the plurality of LAN interfaces; and control communication so that each of the plurality of LAN interfaces functions as a virtual single switch associated with the MAC address.
    Type: Application
    Filed: November 16, 2022
    Publication date: June 15, 2023
    Inventors: Hayato DOI, Nobuhiko UEMURA, Tsuyoshi TAKAZAWA
  • Group-based BCU methods for on-line dynamical security assessments and energy margin calculations of practical power systems
    Patent number: 7761402
    Abstract: This invention relates to a method of determining stability of unstable equilibrium point (UEP) computed by using BCU method, comprising selecting UEP computed by using BCU method, obtaining a test vector Xtest for the selected UEP, say XUEP using the following equation: Xtest=Xspost+0.99(XUEP?Xspost) where Xspost is the SEP, and checking boundary condition of XUEP by simulating system trajectory of post-fault original system starting from Xtest.
    Type: Grant
    Filed: February 1, 2008
    Date of Patent: July 20, 2010
    Assignees: The Tokyo Electric Power Company, Incorporated, Bigwood Systems, Incorporated
    Inventors: Hsiao-Dong Chiang, Hua Li, Yasuyuki Tada, Tsuyoshi Takazawa, Takeshi Yamada, Atsushi Kurita, Kaoru Koyanagi
  • Group-based BCU methods for on-line dynamical security assessments and energy margin calculations of practical power systems
    Patent number: 7483826
    Abstract: This invention relates to a method of determining stability of unstable equilibrium point (UEP) computed by using BCU method, comprising selecting UEP computed by using BCU method, obtaining a test vector Xtest for the selected UEP, say XUEP using the following equation: Xtest=Xspost+0.99(XUEP?Xspost) where Xspost is the SEP, and checking boundary condition of XUEP by simulating system trajectory of post-fault original system starting from Xtest.
    Type: Grant
    Filed: February 9, 2005
    Date of Patent: January 27, 2009
    Assignees: The Tokyo Electric Power Company, Incorporated, Bigwood Systems, Incorporated
    Inventors: Hsiao-Dong Chiang, Hua Li, Yasuyuki Tada, Tsuyoshi Takazawa, Takeshi Yamada, Atsushi Kurita, Kaoru Koyanagi
  • GROUP-BASED BCU METHODS FOR ON-LINE DYNAMICAL SECURITY ASSESSMENTS AND ENERGY MARGIN CALCULATIONS OF PRACTICAL POWER SYSTEMS
    Publication number: 20080126060
    Abstract: This invention relates to a method of determining stability of unstable equilibrium point (UEP) computed by using BCU method, comprising selecting UEP computed by using BCU method, obtaining a test vector Xtest for the selected UEP, say XUEP using the following equation: Xtest=Xspost+0.99(XUEP?Xspost) where Xspost is the SEP, and checking boundary condition of XUEP by simulating system trajectory of post-fault original system starting from Xtest.
    Type: Application
    Filed: February 1, 2008
    Publication date: May 29, 2008
    Applicant: The Tokyo Electric Power Co. Inc.
    Inventors: Hsiao-Dong CHIANG, Hua Li, Yasuyuki Tada, Tsuyoshi Takazawa, Takeshi Yamada, Atsushi Kurita, Kaoru Koyanagi
  • Group-based BCU methods for on-line dynamical security assessments and energy margin calculations of practical power systems
    Publication number: 20060190227
    Abstract: This invention relates to a method of determining stability of unstable equilibrium point (UEP) computed by using BCU method, comprising selecting UEP computed by using BCU method, obtaining a test vector Xtest for the selected UEP, say XUEP using the following equation: Xtest=Xspost+0.99(XUEP?Xspost) where Xspost is the SEP, and checking boundary condition of XUEP by simulating system trajectory of post-fault original system starting from Xtest.
    Type: Application
    Filed: February 9, 2005
    Publication date: August 24, 2006
    Applicants: The Tokyo Electric Power Co. Inc., Bigwood Systems, Incorporated
    Inventors: Hsiao-Dong Chiang, Hua Li, Yasuyuki Tada, Tsuyoshi Takazawa, Takeshi Yamada, Atsushi Kurita, Kaoru Koyanagi