Patents by Inventor Xiaoqian MENG

Xiaoqian MENG 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).

  • Photovoltaic system and leakage current control method for photovoltaic system
    Patent number: 11837868
    Abstract: A photovoltaic system and a leakage current control method for the photovoltaic system includes at least one photovoltaic module group, at least one photovoltaic inverter, a grounded metal frame, and a sampling control unit. The photovoltaic module group is mounted on the grounded metal frame. An output end of the photovoltaic module group is connected to an input end of the photovoltaic inverter, and an output end of the photovoltaic inverter is connected to a power grid. The sampling control unit is coupled to both the photovoltaic module group and the photovoltaic inverter and is configured to detect a current value of a leakage current formed by a common-mode voltage of the photovoltaic inverter on a parasitic capacitor. Herein, the parasitic capacitor exists between the photovoltaic module group and the grounded metal frame.
    Type: Grant
    Filed: March 25, 2022
    Date of Patent: December 5, 2023
    Assignee: Huawei Digital Power Technologies Co., Ltd.
    Inventors: Xiaoqian Meng, Haibin Guo, Yongbing Gao
  • PHOTOVOLTAIC SYSTEM AND LEAKAGE CURRENT CONTROL METHOD FOR PHOTOVOLTAIC SYSTEM
    Publication number: 20220311246
    Abstract: A photovoltaic system and a leakage current control method for the photovoltaic system includes at least one photovoltaic module group, at least one photovoltaic inverter, a grounded metal frame, and a sampling control unit. The photovoltaic module group is mounted on the grounded metal frame. An output end of the photovoltaic module group is connected to an input end of the photovoltaic inverter, and an output end of the photovoltaic inverter is connected to a power grid. The sampling control unit is coupled to both the photovoltaic module group and the photovoltaic inverter and is configured to detect a current value of a leakage current formed by a common-mode voltage of the photovoltaic inverter on a parasitic capacitor. Herein, the parasitic capacitor exists between the photovoltaic module group and the grounded metal frame.
    Type: Application
    Filed: March 25, 2022
    Publication date: September 29, 2022
    Applicant: Huawei Digital Power Technologies Co., Ltd.
    Inventors: Xiaoqian MENG, Haibin GUO, Yongbing GAO