Patents by Inventor Ghirmazion Ghebreyesus

Ghirmazion Ghebreyesus 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).

  • Power transmission networks
    Patent number: 10778011
    Abstract: In the field of high voltage direct current (HVDC) power transmission there is provided a power converter assembly (10) comprising a line-commutated power converter (12) that is configured to transfer power from a DC network (14) to a corresponding receiving AC network (16). The power converter assembly (10) also includes a control unit which is operatively associated with the line-commutated power converter (12) and is programmed, in response to the receiving AC network (16) exhibiting a reduced AC voltage (Va, Vb, Vc), to cause a reduction in the operating DC voltage (VDC) of the line-commutated power converter (12) by the DC network (14).
    Type: Grant
    Filed: October 31, 2017
    Date of Patent: September 15, 2020
    Assignee: GENERAL ELECTRIC TECHNOLOGY GMBH
    Inventors: Robert Whitehouse, Carl D. Barker, Ghirmazion Ghebreyesus
  • IMPROVEMENTS IN OR RELATING TO POWER TRANSMISSION NETWORKS
    Publication number: 20200067317
    Abstract: In the field of high voltage direct current (HVDC) power transmission there is provided a power converter assembly (10) comprising a line-commutated power converter (12) that is configured to transfer power from a DC network (14) to a corresponding receiving AC network (16). The power converter assembly (10) also includes a control unit which is operatively associated with the line-commutated power converter (12) and is programmed, in response to the receiving AC network (16) exhibiting a reduced AC voltage (Va, Vb, Vc), to cause a reduction in the operating DC voltage (VDC) of the line-commutated power converter (12) by the DC network (14).
    Type: Application
    Filed: October 31, 2017
    Publication date: February 27, 2020
    Inventors: Robert Whitehouse, Carl D. Barker, Ghirmazion Ghebreyesus