Patents by Inventor Chuanjun BAI

Chuanjun BAI 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).

  • Method and apparatus for controlling hybrid direct-current transmission system
    Patent number: 10700525
    Abstract: A method and apparatus for controlling a hybrid direct-current (DC) transmission system. The method comprises: adjusting the total number of inserted sub-modules of a modular multi-level converter and the polarity of an output level of the inserted sub-modules in real time, according to a DC voltage of a rectifier station at other end; or adjusting the total number of inserted sub-modules of a modular multi-level converter and the polarity of an output level of the inserted sub-modules in real time, according to the magnitude of a DC current or DC power; or adjusting the total number of inserted sub-modules of a modular multi-level converter and the polarity of an output level of the inserted sub-modules in real time, according to both the magnitude of the DC current and the DC voltage of the rectifier station at the other end. The method can effectively control the DC voltage and the direct current of a hybrid DC transmission system, avoiding the power transmitting breakdown.
    Type: Grant
    Filed: January 19, 2017
    Date of Patent: June 30, 2020
    Assignees: NR ELECTRIC CO., LTD, NR ENGINEERING CO., LTD
    Inventors: Wenqiang Zhao, Nannan Wang, Yongping Wang, Jiang Lu, Chuanjun Bai, Yu Lu
  • Method And Apparatus For Controlling Hybrid Direct-Current Transmission System
    Publication number: 20190052087
    Abstract: A method and apparatus for controlling a hybrid direct-current (DC) transmission system. The method comprises: adjusting the total number of inserted sub-modules of a modular multi-level converter and the polarity of an output level of the inserted sub-modules in real time, according to a DC voltage of a rectifier station at other end; or adjusting the total number of inserted sub-modules of a modular multi-level converter and the polarity of an output level of the inserted sub-modules in real time, according to the magnitude of a DC current or DC power; or adjusting the total number of inserted sub-modules of a modular multi-level converter and the polarity of an output level of the inserted sub-modules in real time, according to both the magnitude of the DC current and the DC voltage of the rectifier station at the other end. The method can effectively control the DC voltage and the direct current of a hybrid DC transmission system, avoiding the power transmitting breakdown.
    Type: Application
    Filed: January 19, 2017
    Publication date: February 14, 2019
    Applicants: NR Electric Co., Ltd., NR Engineering Co., Ltd.
    Inventors: Wenqiang ZHAO, Nannan WANG, Yongping WANG, Jiang LU, Chuanjun BAI, Yu LU