Patents by Inventor Pengzhi Li

Pengzhi 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).

  • SELF-ENERGY-TAKING HYBRID DIRECT-CURRENT CIRCUIT BREAKER AND APPLICATION METHOD THEREFOR
    Publication number: 20250023339
    Abstract: Disclosed in the present application are a self-energy-taking hybrid direct-current circuit breaker and an application method therefor. In the self-energy-taking hybrid direct-current circuit breaker, a breaking branch is connected to a through-current branch in parallel, a first end of a grounding branch is connected to the breaking branch, and a second end of the grounding branch is grounded. When a direct-current system operates stably, the through-current branch conducts a steady-state running current of the direct-current system, and when the direct-current system breaks down, a self-energy-taking capacitor in the breaking branch assists a power electronic device in achieving the breaking of a fault current.
    Type: Application
    Filed: August 17, 2022
    Publication date: January 16, 2025
    Applicants: STATE GRID SMART GRID RESEARCH INSTITUTE CO., LTD., STATE GRID CORPORATION OF CHINA
    Inventors: Wandi ZHOU, Zhiyuan HE, Yuan LIU, Sheng ZHANG, Chong GAO, Pengzhi LI
  • Combined direct current circuit breaker and application method thereof
    Patent number: 10756535
    Abstract: A combined direct current circuit breaker includes a transfer branch, an energy absorption branch, at least two primary branches and at least two secondary branches; the transfer branch is connected in parallel with the energy absorption branch; the primary branches are in one-to-one correspondence with the second branches; the primary branches are connected with direct current outgoing lines of a direct current busbar in a high-voltage direct current power transmission system; the secondary branches are connected in series with the transfer branches and then connected in parallel with two ends of the primary branches corresponding to the secondary branches.
    Type: Grant
    Filed: May 22, 2017
    Date of Patent: August 25, 2020
    Assignees: GLOBAL ENERGY INTERCONNECTION RES. INST. CO., LTD., STATE GRID CORPORATION OF CHINA
    Inventors: Guangfu Tang, Zhiyuan He, Wandi Zhou, Xiaoguang Wei, Sheng Zhang, Yan Zhao, Xiang Luo, Pengzhi Li
  • NOVEL COMBINED DIRECT CURRENT CIRCUIT BREAKER AND APPLICATION METHOD THEREOF
    Publication number: 20190006838
    Abstract: A combined direct current circuit breaker includes a transfer branch, an energy absorption branch, at least two primary branches and at least two secondary branches; the transfer branch is connected in parallel with the energy absorption branch; the primary branches are in one-to-one correspondence with the second branches; the primary branches are connected with direct current outgoing lines of a direct current busbar in a high-voltage direct current power transmission system; the secondary branches are connected in series with the transfer branches and then connected in parallel with two ends of the primary branches corresponding to the secondary branches.
    Type: Application
    Filed: May 22, 2017
    Publication date: January 3, 2019
    Inventors: Guangfu Tang, Zhiyuan He, Wandi Zhou, Xiaoguang Wei, Sheng Zhang, Yan Zhao, Xiang Luo, Pengzhi Li