Inventor
HU ZHAOQING
CN13 patents
Patents
13 patentsUS10523131B2Dec 31, 2019
Reconfigurable MMC sub-module unit and control unit thereof
NR ELECTRIC CO LTD3 citations70
US10840702B2Nov 17, 2020
Direct current power grid voltage control method
NR ELECTRIC CO LTD1 citations61
US11146071B2Oct 12, 2021
Coordinated control method and device for series voltage source converter valve group
NR ELECTRIC CO LTD0 citations51
US10476261B2Nov 12, 2019
Method and system for fault positioning and recovery of voltage source converter
NR ELECTRIC CO LTD0 citations51
US10326275B2Jun 18, 2019
Method for controlling zero sequence voltage of voltage source converter
NR ELECTRIC CO LTD0 citations51
US10218184B2Feb 26, 2019
Method for inhibiting multiple inverter stations from entering passive control mode in island state
NR ELECTRIC CO LTD0 citations51
US11374411B2Jun 28, 2022
Converter control method and device
NR ELECTRIC CO LTD0 citations50
US11329486B2May 10, 2022
Method for initiating flexible DC transmission system under isolated island condition
NR ELECTRIC CO LTD0 citations50
US11289905B2Mar 29, 2022
Voltage and current control method and device for direct-current power transmission system
NR ELECTRIC CO LTD0 citations49
US10396562B2Aug 27, 2019
Series compensation device applicable to double-circuit line
NR ELECTRIC CO LTD0 citations48
US10418816B2Sep 17, 2019
Passive islanding-to-grid-connected switch method
NR ELECTRIC CO LTD0 citations41
US10461525B2Oct 29, 2019
Fault current limiting control and protection coordination method for converter of flexible direct current power transmission system operating in islanding state
NR ELECTRIC CO LTD0 citations40
US10270332B2Apr 23, 2019
Overload current limiting method for voltage source converter
NR ELECTRIC CO LTD0 citations40