Patents by Inventor Johan SALJ

Johan SALJ 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).

  • Handling of lost time synchronization in a substation network
    Patent number: 12166350
    Abstract: There is provided mechanisms for handling time shifted data streams in a substation network. A method is performed by an IED. The method comprises receiving a respective data stream from at least two time synchronized data sources in the substation network. The method comprises blocking, upon detecting a time shift between the data streams resulting from one of the data sources losing its time synchronization and until a configured time amount has expired, a protection function in the substation network from acting based on the data streams.
    Type: Grant
    Filed: April 14, 2020
    Date of Patent: December 10, 2024
    Assignee: HITACHI ENERGY LTD
    Inventors: Carl Byman, Johan Salj, Henrik Pind
  • Time synchronization between IEDs of different substations
    Patent number: 12003087
    Abstract: There is provided mechanisms for time-synchronized communication of packets between a first substation and a second substation interconnected by a communication channel. Samples obtained within the second substation are provided with time information associated with a common reference clock and sent to the first substation, at which a time-wise synchronization of the received samples with samples obtained within the first substation is performed by means of the time information and a time difference between the common reference clock and a local reference clock of the first substation.
    Type: Grant
    Filed: January 27, 2021
    Date of Patent: June 4, 2024
    Assignee: Hitachi Energy Ltd
    Inventor: Johan Salj
  • TIME SYNCHRONIZATION BETWEEN IEDS OF DIFFERENT SUBSTATIONS
    Publication number: 20230077975
    Abstract: There is provided mechanisms for time-synchronized communication of packets between a first substation and a second substation interconnected by a communication channel. Samples obtained within the second substation are provided with time information associated with a common reference clock and sent to the first substation, at which a time-wise synchronization of the received samples with samples obtained within the first substation is performed by means of the time information and a time difference between the common reference clock and a local reference clock of the first substation.
    Type: Application
    Filed: January 27, 2021
    Publication date: March 16, 2023
    Inventor: Johan SALJ
  • HANDLING OF LOST TIME SYNCHRONIZATION IN A SUBSTATION NETWORK
    Publication number: 20220181878
    Abstract: There is provided mechanisms for handling time shifted data streams in a substation network. A method is performed by an IED. The method comprises receiving a respective data stream from at least two time synchronized data sources in the substation network. The method comprises blocking, upon detecting a time shift between the data streams resulting from one of the data sources losing its time synchronization and until a configured time amount has expired, a protection function in the substation network from acting based on the data streams.
    Type: Application
    Filed: April 14, 2020
    Publication date: June 9, 2022
    Inventors: Carl BYMAN, Johan SALJ, Henrik PIND