Patents by Inventor TIANGUI JIANG
TIANGUI JIANG 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).
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Patent number: 11264891Abstract: A redundant energy acquisition circuit of a power module includes at least one power semiconductor device, a first capacitor, and a first bypass switch. The redundant energy acquisition circuit of the power module includes: a power supply board acquiring energy from the first capacitor, supplying power to a control board, and charging a discharge circuit. A first charging circuit has one end connected to a positive electrode of the first capacitor and another end connected to the discharge circuit, and charges the discharge circuit when the power supply board is not operating normally. The control board controls the discharge circuit to close. The discharge circuit discharges and triggers the first bypass switch to close after the discharge circuit is closed.Type: GrantFiled: January 21, 2019Date of Patent: March 1, 2022Assignees: NR ELECTRIC CO., LTDInventors: Yeyuan Xie, Haiying Li, Tiangui Jiang, Minglian Zhu, Dongming Cao, Zhongfeng Zhang
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Publication number: 20210036600Abstract: A redundant energy acquisition circuit of a power module includes at least one power semiconductor device, a first capacitor, and a first bypass switch. The redundant energy acquisition circuit of the power module includes: a power supply board acquiring energy from the first capacitor, supplying power to a control board, and charging a discharge circuit. A first charging circuit has one end connected to a positive electrode of the first capacitor and another end connected to the discharge circuit, and charges the discharge circuit when the power supply board is not operating normally. The control board controls the discharge circuit to close. The discharge circuit discharges and triggers the first bypass switch to close after the discharge circuit is closed.Type: ApplicationFiled: January 21, 2019Publication date: February 4, 2021Inventors: Yeyuan XIE, Haiying LI, Tiangui JIANG, Minglian ZHU, Dongming CAO, Zhongfeng ZHANG
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Patent number: 10763761Abstract: A sub-module based hybrid converter is provided. By setting a half-controlled charging link of changing full bridge sub-modules from a blocked state to a half-blocked state one by one in a charging process, and raising the voltages of half bridge sub-modules to reach the starting point of a half bridge sub-module based self-powered supply in an uncontrolled stage of the half bridge sub-modules, the starting point of the sub-module based self-powered supply is increased, and the design difficulty of the sub-module based self- powered supply is reduced. The present invention also includes another charging method for a sub-module based hybrid converter.Type: GrantFiled: January 12, 2018Date of Patent: September 1, 2020Assignees: NR ELECTRIC CO., LTD., NR ENGINEERING CO., LTDInventors: Jiudong Ding, Yu Lu, Yunlong Dong, Haiying Li, Jie Tian, Defeng Qiu, Tiangui Jiang, Jianyang Lian
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Publication number: 20200076321Abstract: The present invention discloses a charging method for a sub-module based hybrid converter. By setting a half-controlled charging link of changing full bridge sub-modules from a blocked state to a half-blocked state one by one in a charging process, and raising the voltages of half bridge sub-modules to reach the starting point of a half bridge sub-module based self-powered supply in an uncontrolled stage of the half bridge sub-modules, the starting point of the sub-module based self-powered supply is increased, and the design difficulty of the sub-module based self-powered supply is reduced. The present invention also discloses another charging method for a sub-module based hybrid converter. The above objective can also be achieved by setting a half-controlled charging link of changing the full bridge sub-modules from a blocked state to a bypassed state one by one in the charging process.Type: ApplicationFiled: January 12, 2018Publication date: March 5, 2020Applicants: NR ELECTRIC CO., LTD, NR ENGINEERING CO., LTDInventors: Jiudong DING, Yu LU, Yunlong DONG, Haiying LI, Jie TIAN, Defeng QIU, Tiangui JIANG, Jianyang LIAN
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Patent number: 10483788Abstract: The present invention discloses a charging method for a sub-module based hybrid converter. By setting a half-controlled charging link of half-blocking all full bridge sub-modules in a charging process, and raising the voltages of half bridge sub-modules to reach the starting point of a half bridge sub-module based self-powered supply in an uncontrolled stage of the half bridge sub-modules, the starting point of the sub-module based self-powered supply is increased, and the design difficulty of the sub-module based self-powered supply is reduced. The present invention also discloses another charging method for a sub-module based hybrid converter. The above objective can also be achieved by setting a half-controlled charging link of bypassing all full bridge sub-modules in the charging process.Type: GrantFiled: January 12, 2018Date of Patent: November 19, 2019Assignees: NR ELECTRIC CO., LTD, NR ENGINEERING CO., LTDInventors: Jiudong Ding, Yu Lu, Yunlong Dong, Haiying Li, Jie Tian, Defeng Qiu, Tiangui Jiang, Jianyang Lian
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Patent number: 10476261Abstract: A method for fault positioning and recovery of a voltage source converter includes following steps. Locking a converter station when it is detected that an alternating-current voltage contains a zero sequence voltage or a direct-current voltage contains an unbalanced voltage. Positioning a fault by continuing to detect the zero sequence voltage of an alternating-current side of the converter. Recovering operation of each station after the fault is positioned. The method for fault positioning and recovery is simple, practical, has high reliability, and can effectively detect the problems that each station contains a zero sequence voltage of an alternating-current side and cannot easily position a fault caused due to transmission of the zero sequence voltage of the alternating-current side to an opposite-side alternating-current system via a voltage source converter.Type: GrantFiled: April 25, 2017Date of Patent: November 12, 2019Assignees: NR ELECTRIC CO., LTD, NR ENGINEERING CO., LTDInventors: Gang Li, Yu Lu, Zhaoqing Hu, Jie Tian, Yunlong Dong, Tiangui Jiang, Haiying Li, Yadong Feng, Ke Wang, Jiang Lu, Shunke Sui, Hui Wang, Nannan Wang
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Publication number: 20190326770Abstract: The present invention discloses a charging method for a sub-module based hybrid converter. By setting a half-controlled charging link of half-blocking all full bridge sub-modules in a charging process, and raising the voltages of half bridge sub-modules to reach the starting point of a half bridge sub-module based self-powered supply in an uncontrolled stage of the half bridge sub-modules, the starting point of the sub-module based self-powered supply is increased, and the design difficulty of the sub-module based self-powered supply is reduced. The present invention also discloses another charging method for a sub-module based hybrid converter. The above objective can also be achieved by setting a half-controlled charging link of bypassing all full bridge sub-modules in the charging process.Type: ApplicationFiled: January 12, 2018Publication date: October 24, 2019Applicants: NR ELECTRIC CO., LTD, NR ENGINEERING CO., LTDInventors: Jiudong DING, Yu LU, Yunlong DONG, Haiying LI, Jie TIAN, Defeng QIU, Tiangui JIANG, Jianyang LIAN
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Patent number: 10326275Abstract: Provided is a method for controlling a zero sequence voltage of a voltage source converter. When an alternating current system ground fault occurs, a zero sequence voltage at an alternating current (AC) side or a zero sequence voltage at a direct current (DC) side of a converter is detected. If the detected zero sequence voltage is greater than a set value V0ref, a DC side voltage of the converter can be increased to a set value Udc0, thereby generating an appropriate reference wave at the AC side of the converter to match an AC voltage, and accordingly controlling overmodulation of a reference wave at a faulty station to suppress fluctuation of a DC voltage.Type: GrantFiled: April 19, 2017Date of Patent: June 18, 2019Assignees: NR ELECTRIC CO., LTD, NR ENGINEERING CO., LTDInventors: Ke Wang, Gang Li, Yu Lu, Yunlong Dong, Jiang Lu, Zhaoqing Hu, Tiangui Jiang
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Publication number: 20190140441Abstract: A method for fault positioning and recovery of a voltage source converter includes following steps. Locking a converter station when it is detected that an alternating-current voltage contains a zero sequence voltage or a direct-current voltage contains an unbalanced voltage. Positioning a fault by continuing to detect the zero sequence voltage of an alternating-current side of the converter. Recovering operation of each station after the fault is positioned. The method for fault positioning and recovery is simple, practical, has high reliability, and can effectively detect the problems that each station contains a zero sequence voltage of an alternating-current side and cannot easily position a fault caused due to transmission of the zero sequence voltage of the alternating-current side to an opposite-side alternating-current system via a voltage source converter.Type: ApplicationFiled: April 25, 2017Publication date: May 9, 2019Applicants: NR ELECTRIC CO., LTD, NR ENGINEERING CO., LTDInventors: Gang LI, Yu LU, Zhaoqing HU, Jie TIAN, Yunlong DONG, Tiangui JIANG, Haiying LI, Yadong FENG, Ke WANG, Jiang LU, Shunke SUI, Hui WANG, Nannan WANG
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Publication number: 20190109459Abstract: Provided is a method for controlling a zero sequence voltage of a voltage source converter. When an alternating current system ground fault occurs, a zero sequence voltage at an alternating current (AC) side or a zero sequence voltage at a direct current (DC) side of a converter is detected. If the detected zero sequence voltage is greater than a set value V0ref, a DC side voltage of the converter can be increased to a set value Udc0, thereby generating an appropriate reference wave at the AC side of the converter to match an AC voltage, and accordingly controlling overmodulation of a reference wave at a faulty station to suppress fluctuation of a DC voltage.Type: ApplicationFiled: April 19, 2017Publication date: April 11, 2019Applicants: NR ELECTRIC CO., LTD, NR ENGINEERING CO., LTDInventors: Ke WANG, Gang LI, Yu LU, Yunlong DONG, Jiang LU, Zhaoqing HU, Tiangui JIANG
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Patent number: 10224833Abstract: Disclosed are a modulation method of a modular multilevel converter and a fault isolation method of a submodule unit. The modulation method comprises a first mode and a second mode, and the first mode and the second mode operate cyclically. In the first mode, a first power semiconductor switch and a second power semiconductor switch are turned on alternately, while a third power semiconductor switch is turned off normally and a fourth power semiconductor switch is turned on normally. In the second mode, the third power semiconductor switch and the fourth power semiconductor switch are turned on alternately, while the first power semiconductor switch is turned on normally and the second power semiconductor switch is turned off normally.Type: GrantFiled: July 13, 2016Date of Patent: March 5, 2019Assignees: NR ELECTRIC CO., LTD, NR ENGINEERING CO., LTD.Inventors: Yeyuan Xie, Dongming Cao, Tiangui Jiang, Minglian Zhu, Guanxian Yin
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Patent number: 10148083Abstract: Disclosed are a fault current-suppressing damper topology circuit and a control method thereof and a converter. An anode of a separate diode is connected to a positive electrode of a second switch module, a cathode of the separate diode is connected to one end of an energy storage capacitor, and the other end of the energy storage capacitor is connected to a negative electrode of a first switch module; a damping resistor is connected in parallel with an arrester and then with the first switch module; a bypass switch is connected in parallel between a terminal x1 and a terminal x2 of the damper topology circuit; a power supply system acquires energy from the energy storage capacitor and supplies power to a control system; and the control system controls an operating state of the damper topology circuit by controlling the bypass switch, the first switch module and the second switch module. The fault current-suppressing damper topology circuit is applied to voltage source converters.Type: GrantFiled: July 13, 2016Date of Patent: December 4, 2018Assignees: NR ELECTRIC CO., LTD, NR ENGINEERING CO., LTDInventors: Yeyuan Xie, Minglian Zhu, Tiangui Jiang, Chuanjun Bo, Min Li
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Publication number: 20180226900Abstract: Disclosed are a modulation method of a modular multilevel converter and a fault isolation method of a submodule unit. The modulation method comprises a first mode and a second mode, and the first mode and the second mode operate cyclically. In the first mode, a first power semiconductor switch and a second power semiconductor switch are turned on alternately, while a third power semiconductor switch is turned off normally and a fourth power semiconductor switch is turned on normally. In the second mode, the third power semiconductor switch and the fourth power semiconductor switch are turned on alternately, while the first power semiconductor switch is turned on normally and the second power semiconductor switch is turned off normally.Type: ApplicationFiled: July 13, 2016Publication date: August 9, 2018Applicants: NR ELECTRIC CO., LTD, NR ENGINEERING CO., LTDInventors: Yeyuan XIE, Dongming CAO, Tiangui JIANG, Minglian ZHU, Guanxian YIN
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Publication number: 20180183231Abstract: Disclosed are a fault current-suppressing damper topology circuit and a control method thereof and a converter. An anode of a separate diode is connected to a positive electrode of a second switch module, a cathode of the separate diode is connected to one end of an energy storage capacitor, and the other end of the energy storage capacitor is connected to a negative electrode of a first switch module; a damping resistor is connected in parallel with an arrester and then with the first switch module; a bypass switch is connected in parallel between a terminal x1 and a terminal x2 of the damper topology circuit; a power supply system acquires energy from the energy storage capacitor and supplies power to a control system; and the control system controls an operating state of the damper topology circuit by controlling the bypass switch, the first switch module and the second switch module. The fault current-suppressing damper topology circuit is applied to voltage source converters.Type: ApplicationFiled: July 13, 2016Publication date: June 28, 2018Applicants: NR ELECTRIC CO., LTD, NR ENGINEERING CO., LTDInventors: YEYUAN XIE, MINGLIAN ZHU, TIANGUI JIANG, CHUANJUN BO, MIN LI