Patents by Inventor Neil-QiNan Li

Neil-QiNan Li 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).

  • UHVDC converter transformer re-usage for LCC to VSC upgrade
    Patent number: 11894684
    Abstract: A voltage source converter (VSC) system of a high-voltage direct current (HVDC) system is disclosed. The system includes a number of line-commutated converter (LCC) transformers. Each LCC transformer is operable to transform alternate current (AC) voltage. A number of VSC converter units are connected in series and coupled to the plurality of LCC transformers. Each VSC converter unit is operable to convert between the AC voltage and direct current (DC) voltage. A bypass breaker is connected in parallel with at least one of the VSC converter units and operable to be closed to bypass the at least one VSC converter unit.
    Type: Grant
    Filed: December 6, 2017
    Date of Patent: February 6, 2024
    Assignee: Hitachi Energy Ltd
    Inventors: Mats Andersson, ChunMing Yuan, XiaoBo Yang, DaWei Yao, Neil-QiNan Li
  • UHVDC Converter Transformer Re-Usage for LCC to VSC Upgrade
    Publication number: 20200313571
    Abstract: A voltage source converter (VSC) system of a high-voltage direct current (HVDC) system is disclosed. The system includes a number of line-commutated converter (LCC) transformers. Each LCC transformer is operable to transform alternate current (AC) voltage. A number of VSC converter units are connected in series and coupled to the plurality of LCC transformers. Each VSC converter unit is operable to convert between the AC voltage and direct current (DC) voltage. A bypass breaker is connected in parallel with at least one of the VSC converter units and operable to be closed to bypass the at least one VSC converter unit.
    Type: Application
    Filed: December 6, 2017
    Publication date: October 1, 2020
    Inventors: Mats Andersson, ChunMing Yuan, XiaoBo Yang, DaWei Yao, Neil-QiNan Li