Patents by Inventor Boliang LIU

Boliang LIU 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).

  • Control method for a parallel MMC unit of a LCC-MMC hybrid cascade converter station
    Patent number: 11616369
    Abstract: Provided is a control method for a parallel MMC unit of a LCC-MMC hybrid cascade converter station. The control strategy includes: 1) numbering all MMC units connected in parallel in a MMC valve manifold; (2) for a MMC unit using a constant direct-current voltage control manner, calculating a direct-current instruction value of the MMC unit according to a direct-current measurement value; (3) for a MMC unit using a constant active power control manner, calculating an active power instruction value of the MMC unit according to the rated capacity of the MMC unit and a direct-current instruction value of a system rectifier station; (4) for the MMC unit using the constant direct-current voltage control manner, correcting a direct-current voltage instruction value of the MMC unit by using the direct-current instruction value and the direct-current measurement value, and controlling the MMC unit according to the corrected direct-current voltage instruction value.
    Type: Grant
    Filed: October 1, 2020
    Date of Patent: March 28, 2023
    Assignees: STATE GRID JIANGSU ELECTRIC POWER CO., LTD., STATE GRID JIANGSU ELECTRIC POWER CO., LTD. ECONOMIC RESEARCH INSTITUTE, STATE GRID JIANGSU ELECTRIC POWER DESIGN CONSULTING INSTITUTE CO., LTD., STATE GRID CORPORATION OF CHINA, STATE GRID JIANGSU ELECTRIC POWER CO., LTD. MARKETING CENTER
    Inventors: Hui Cai, Zhenjian Xie, Zhuyi Peng, Feifei Zhao, Xingning Han, Caixuan Xu, Chengchen Huang, Zheng Xu, Ming Yan, Zheren Zhang, Wanchun Qi, Wenjia Zhang, Wentao Sun, Chen Li, Quanquan Wang, Boliang Liu
  • CONTROL METHOD FOR A PARALLEL MMC UNIT OF A LCC-MMC HYBRID CASCADE CONVERTER STATION
    Publication number: 20210143754
    Abstract: Provided is a control method for a parallel MMC unit of a LCC-MMC hybrid cascade converter station. The control strategy includes: 1) numbering all MMC units connected in parallel in a MMC valve manifold; (2) for a MMC unit using a constant direct-current voltage control manner, calculating a direct-current instruction value of the MMC unit according to a direct-current measurement value; (3) for a MMC unit using a constant active power control manner, calculating an active power instruction value of the MMC unit according to the rated capacity of the MMC unit and a direct-current instruction value of a system rectifier station; (4) for the MMC unit using the constant direct-current voltage control manner, correcting a direct-current voltage instruction value of the MMC unit by using the direct-current instruction value and the direct-current measurement value, and controlling the MMC unit according to the corrected direct-current voltage instruction value.
    Type: Application
    Filed: October 1, 2020
    Publication date: May 13, 2021
    Inventors: Hui CAI, Zhenjian XIE, Zhuyi PENG, Feifei ZHAO, Xingning HAN, Caixuan XU, Chengchen HUANG, Zheng XU, Ming YAN, Zheren ZHANG, Wanchun QI, Wenjia ZHANG, Wentao SUN, Chen LI, Quanquan WANG, Boliang LIU