Patents by Inventor Felipe SOBRINHO

Felipe SOBRINHO 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).

  • Change of current return path in a bipole power transmission system
    Patent number: 9973004
    Abstract: An arrangement for changing current return path in a bipole direct current power transmission system includes a converter station having an active and a passive converter connected in series between an active and a passive pole line via a first neutral bus, a metallic return transfer switch in an electrode line, a ground return transfer switch in a current redirecting path between the passive pole line and the neutral bus and a control unit which in case of change to the passive pole line for providing a return current path is configured to, upon control of power related to the active converter from steady-state to zero, close the ground return transfer switch and thereafter open the metallic return transfer switch, whereupon power related to the active converter may be controlled back to steady state.
    Type: Grant
    Filed: May 18, 2015
    Date of Patent: May 15, 2018
    Assignee: ABB SCHWEIZ AG
    Inventors: Tommy Holmgren, David Shearer, Felipe Sobrinho, Hector-Armando Avila, Per-Erik Björklund, Sören Nyberg
  • CHANGE OF CURRENT RETURN PATH IN A BIPOLE POWER TRANSMISSION SYSTEM
    Publication number: 20180109109
    Abstract: An arrangement for changing current return path in a bipole direct current power transmission system includes a converter station having an active and a passive converter connected in series between an active and a passive pole line via a first neutral bus, a metallic return transfer switch in an electrode line, a ground return transfer switch in a current redirecting path between the passive pole line and the neutral bus and a control unit which in case of change to the passive pole line for providing a return current path is configured to, upon control of power related to the active converter from steady-state to zero, close the ground return transfer switch and thereafter open the metallic return transfer switch, whereupon power related to the active converter may be controlled back to steady state.
    Type: Application
    Filed: May 18, 2015
    Publication date: April 19, 2018
    Applicant: ABB Schweiz AG
    Inventors: Tommy HOLMGREN, David SHEARER, Felipe SOBRINHO, Hector-Armando AVILA, Per-Erik BJÖRKLUND, Sören NYBERG