Patents by Inventor Helen-Xing Huang

Helen-Xing Huang 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).

  • Fault isolation and system restoration using power converter
    Patent number: 10411587
    Abstract: Unique systems, methods, techniques and apparatuses of a DC fault isolation system are disclosed. One exemplary embodiment is a power conversion system comprising a converter including a midpoint connection structured to receive AC power, a first converter arm, a second converter arm, and a control system. The control system is configured to operate the converter a fault condition mode in response to a DC fault condition, wherein the fault condition mode operates at least one full bridge cell of the second converter arm so as to interrupt current flowing between the midpoint connection and the second DC bus rail and operates the first converter arm so as to allow the AC power to flow between the midpoint connection and the first DC bus rail in response to detecting the DC fault condition.
    Type: Grant
    Filed: December 13, 2017
    Date of Patent: September 10, 2019
    Assignee: ABB Schweiz AG
    Inventors: Li Qi, Helen-Xing Huang, Xianyong Feng, Jiuping Pan
  • FAULT ISOLATION AND SYSTEM RESTORATION USING POWER CONVERTER
    Publication number: 20180166972
    Abstract: Unique systems, methods, techniques and apparatuses of a DC fault isolation system are disclosed. One exemplary embodiment is a power conversion system comprising a converter including a midpoint connection structured to receive AC power, a first converter arm, a second converter arm, and a control system. The control system is configured to operate the converter a fault condition mode in response to a DC fault condition, wherein the fault condition mode operates at least one full bridge cell of the second converter arm so as to interrupt current flowing between the midpoint connection and the second DC bus rail and operates the first converter arm so as to allow the AC power to flow between the midpoint connection and the first DC bus rail in response to detecting the DC fault condition.
    Type: Application
    Filed: December 13, 2017
    Publication date: June 14, 2018
    Inventors: Li Qi, Helen-Xing Huang, Xianyong Feng, Jiuping Pan