Patents by Inventor Shunke SUI
Shunke SUI 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: 11329486Abstract: During initiation under an isolated island condition, the amplitude of a voltage reference wave output generated by a flexible DC transmission control and protection system is in a segmented mode, wherein a first segment of the reference wave amplitude begins at zero or a fixed value Ux and rapidly increases to Ua kV at a rate of a kV/s, avoiding a low output voltage reference wave and high error and harmonic content of a sampled voltage and current. A second segment increases to Ub kV at a rate of ? kV/s, a third segment increases to Uc kV at a rate of ? kV/s, and the Nth segment increases to a rated voltage of UN kV at a rate of ? kV/s, thereby achieving non-disturbance and shockless initiation of a flexible DC transmission system under an isolated island condition.Type: GrantFiled: April 27, 2018Date of Patent: May 10, 2022Assignees: NR ELECTRIC CO., LTD, NR ENGINEERING CO., LTDInventors: Ke Wang, Shunke Sui, Yu Lu, Yunlong Dong, Zhaoqing Hu, Gang Li
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Patent number: 10923906Abstract: A fault switch configuration and clearing method in a flexible DC converter station, the flexible DC converter station is configured with a grid side switch and a valve side phase-split switch in the converter station. When a fault occurs, a faulty phase and a non-faulty phase are detected and identified by means of differential protection or low voltage overcurrent. An alternating current zero crossing condition is created by means of firstly turn off the non-faulty phase valve side phase-split switch and the grid side switch, thereby cutting off the faulty phase, disconnecting the connection between a power supply and a fault point, and achieving the clearing for faults. The described fault-clearing method is simple and practical, highly reliable, and connection between the fault point and the power supply is quickly and effectively cut; converter station equipment is effectively protected, and further expansion of the fault is avoided.Type: GrantFiled: May 22, 2018Date of Patent: February 16, 2021Assignees: NR ELECTRIC CO., LTD., NR ENGINEERING CO., LTD.Inventors: Yu Lu, Gang Li, Jie Tian, Nannan Wang, Haiying Li, Chongxue Jiang, Shunke Sui
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Publication number: 20200220349Abstract: A fault switch configuration and clearing method in a flexible DC converter station, the flexible DC converter station is configured with a grid side switch and a valve side phase-split switch in the converter station. When a fault occurs, a faulty phase and a non-faulty phase are detected and identified by means of differential protection or low voltage overcurrent. An alternating current zero crossing condition is created by means of firstly turn off the non-faulty phase valve side phase-split switch and the grid side switch, thereby cutting off the faulty phase, disconnecting the connection between a power supply and a fault point, and achieving the clearing for faults. The described fault-clearing method is simple and practical, highly reliable, and connection between the fault point and the power supply is quickly and effectively cut; converter station equipment is effectively protected, and further expansion of the fault is avoided.Type: ApplicationFiled: May 22, 2018Publication date: July 9, 2020Applicants: NR ELECTRIC CO., LTD, NR ENGINEERING CO., LTDInventors: Yu LU, Gang LI, Jie TIAN, Nannan WANG, Haiying LI, Chongxue JIANG, Shunke SUI
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Publication number: 20200195013Abstract: During initiation under an isolated island condition, the amplitude of a voltage reference wave output generated by a flexible DC transmission control and protection system is in a segmented mode, wherein a first segment of the reference wave amplitude begins at zero or a fixed value Ux and rapidly increases to Ua kV at a rate of a kV/s, avoiding a low output voltage reference wave and high error and harmonic content of a sampled voltage and current. A second segment increases to Ub kV at a rate of ? kV/s, a third segment increases to Uc kV at a rate of ? kV/s, and the Nth segment increases to a rated voltage of UN kV at a rate of ? kV/s, thereby achieving non-disturbance and shockless initiation of a flexible DC transmission system under an isolated island condition.Type: ApplicationFiled: April 27, 2018Publication date: June 18, 2020Inventors: Ke WANG, Shunke SUI, Yu LU, Yunlong DONG, Zhaoqing HU, Gang LI
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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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Patent number: 10396562Abstract: A series compensation device suitable to double-circuit lines is disclosed. The device includes one series transformer and one converter. One converter and dual-circuit transmission lines are respectively connected to three windings of one series transformer. In the solution provided in the present application, the device can be independently installed in a power transmission system to be used as a static synchronous series compensator, and can also be used as a component of a unified power flow controller, a convertible static compensator, an interline power flow controller and a unified power quality conditioner to be connected to a power transmission system device in series. The device can save the capacity of a converter, improve the application efficiency of the series compensation device, and reduce the cost and area occupation.Type: GrantFiled: August 15, 2017Date of Patent: August 27, 2019Assignees: NR ELECTRIC CO., LTD, NR ENGINEERING CO., LTDInventors: Ruhai Huang, Yu Lu, Yunlong Dong, Lei Pan, Defeng Qiu, Chongxue Jiang, Jiang Lu, Gang Li, Zhaoqing Hu, Nannan Wang, Jiudong Ding, Ke Wang, Xianlai Hu, Hui Wang, Shunke Sui
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Publication number: 20190157871Abstract: A series compensation device suitable to double-circuit lines is disclosed. The device includes one series transformer and one converter. One converter and dual-circuit transmission lines are respectively connected to three windings of one series transformer. In the solution provided in the present application, the device can be independently installed in a power transmission system to be used as a static synchronous series compensator, and can also be used as a component of a unified power flow controller, a convertible static compensator, an interline power flow controller and a unified power quality conditioner to be connected to a power transmission system device in series. The device can save the capacity of a converter, improve the application efficiency of the series compensation device, and reduce the cost and area occupation.Type: ApplicationFiled: August 15, 2017Publication date: May 23, 2019Applicants: NR Electric Co., Ltd, NR Engineering Co., LtdInventors: Ruhai HUANG, Yu LU, Yunlong DONG, Lei PAN, Defeng QIU, Chongxue JIANG, Jiang LU, Gang LI, Zhaoqing HU, Nannan WANG, Jiudong DING, Ke WANG, Xianlai HU, Hui WANG, Shunke SUI
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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