Patents by Inventor Zhijiang Liao

Zhijiang Liao 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 FOR DETECTING ABNORMAL DIRECT CURRENT VOLTAGE MEASUREMENT IN HIGH VOLTAGE FLEXIBLE DIRECT CURRENT TRANSMISSION SYSTEM
    Publication number: 20240097434
    Abstract: A method for detecting abnormal direct current voltage measurement in a modular multilevel converter high voltage direct current transmission system is provided. In the method, a valve group voltage at a detection pole is obtained, voltages at voltage measurement points at the detection pole are collected, and comparison and determination are performed based on the actual arrangement of the voltage measurement points, and then whether an abnormal measurement occurs at each of the voltage measurement points is determined.
    Type: Application
    Filed: May 18, 2022
    Publication date: March 21, 2024
    Applicant: ELECTRIC POWER RESEARCH INSTITUTE. CHINA SOUTHERN POWER GRID
    Inventors: Qinlei CHEN, Shuyong LI, Qi GUO, Libin HUANG, Xuehua LIN, Zhijiang LIU, Deyang CHEN, Chao LUO, Guanming ZENG, Mengjun LIAO, Lijun DENG, Liu CUI, Zhida HUANG, Haiping GUO, Tianyu GUO
  • Ethernet ring protection switching method and node
    Patent number: 10721094
    Abstract: An Ethernet ring protection switching (ERPS) method and a node, where the method includes clearing, by a first node, media access control (MAC) address forwarding tables of a first ERPS port and a second ERPS port, and simultaneously changing multiple ports including the first ERPS port and the second ERPS port to a broadcasting state when the first ERPS port becomes faulty, where the second ERPS port is another ERPS port except the first ERPS port, sending, in a broadcasting manner using a port in the multiple ports, the MAC packet to a target node when a MAC packet is received, and changing the multiple ports to a forwarding state, learning a MAC address according to a broadcasting path of the MAC packet to obtain a target MAC address forwarding table of the second ERPS port. Hence, ERPS efficiency may be improved.
    Type: Grant
    Filed: October 26, 2017
    Date of Patent: July 21, 2020
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Wenhua Xiao, Zufa Yang, Jingtao Li, Hongjun Gao, Zhijiang Liao
  • Ethernet Ring Protection Switching Method and Node
    Publication number: 20180048488
    Abstract: An Ethernet ring protection switching (ERPS) method and a node, where the method includes clearing, by a first node, media access control (MAC) address forwarding tables of a first ERPS port and a second ERPS port, and simultaneously changing multiple ports including the first ERPS port and the second ERPS port to a broadcasting state when the first ERPS port becomes faulty, where the second ERPS port is another ERPS port except the first ERPS port, sending, in a broadcasting manner using a port in the multiple ports, the MAC packet to a target node when a MAC packet is received, and changing the multiple ports to a forwarding state, learning a MAC address according to a broadcasting path of the MAC packet to obtain a target MAC address forwarding table of the second ERPS port. Hence, ERPS efficiency may be improved.
    Type: Application
    Filed: October 26, 2017
    Publication date: February 15, 2018
    Inventors: Wenhua Xiao, Zufa Yang, Jingtao Li, Hongjun Gao, Zhijiang Liao