Patents by Inventor Jiudong DING
Jiudong DING 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: 11355932Abstract: Disclosed are a control method and system for a parallel converter system, including a common AC voltage controller and a separate current controller for each converter; the AC voltage controller generates an active current, a wattless current, and a system voltage phase reference value and, by means of communication, sends same to the current controller of each converter in island control mode to be a converter control signal; the active and wattless current outputted by each converter, along with the corresponding current reference value, accomplish the objective of the parallel converter system collectively controlling the amplitude and frequency of an AC bus voltage. The method and system are highly reliable and effectively ensure the synchronization of a plurality of converters.Type: GrantFiled: May 22, 2018Date of Patent: June 7, 2022Assignees: NR ELECTRIC CO., LTD, NR ENGINEERING CO., LTDInventors: Nannan Wang, Yu Lu, Yunlong Dong, Jie Tian, Chongxue Jiang, Jiacheng Wang, Gang Li, Jiudong Ding, Haiying Li
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Patent number: 11146071Abstract: A coordinated control method for series voltage source converter valve groups comprises: allocating a total direct-current voltage reference value or a total active power reference value at the end where a direct-current electrode series voltage source converter valve group is located according to the total number of voltage source converter valve groups in series; for a direct-current voltage control end, controlling the direct-current voltage of each valve group according to the assigned direct-current voltage reference value for each valve group; for an active power control end, controlling the active power of each valve group according to the assigned active power reference value for each valve group and based on adding the active power compensation amount of the valve group which has voltage equalization effects on the valve group. Correspondingly, also providing a coordinated control device for series voltage source converter valve groups.Type: GrantFiled: November 28, 2018Date of Patent: October 12, 2021Assignees: NR ELECTRIC CO., LTD., NR ENGINEERING CO., LTD.Inventors: Jiang Lu, Yu Lu, Yunlong Dong, Yongping Wang, Jie Tian, Haiying Li, Zhaoqing Hu, Nannan Wang, Ke Wang, Jiudong Ding
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Publication number: 20210126462Abstract: A coordinated control method for series voltage source converter valve groups comprises: allocating a total direct-current voltage reference value or a total active power reference value at the end where a direct-current electrode series voltage source converter valve group is located according to the total number of voltage source converter valve groups in series; for a direct-current voltage control end, controlling the direct-current voltage of each valve group according to the assigned direct-current voltage reference value for each valve group; for an active power control end, controlling the active power of each valve group according to the assigned active power reference value for each valve group and based on adding the active power compensation amount of the valve group which has voltage equalization effects on the valve group. Correspondingly, also providing a coordinated control device for series voltage source converter valve groups.Type: ApplicationFiled: November 28, 2018Publication date: April 29, 2021Applicants: NR ELECTRIC CO., LTD., NR ENGINEERING CO., LTD.Inventors: Jiang LU, Yu LU, Yunlong DONG, Yongping WANG, Jie TIAN, Haiying LI, Zhaoqing HU, Nannan WANG, Ke WANG, Jiudong DING
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Patent number: 10840702Abstract: Provided in the present invention is a direct current power grid voltage control method, dividing control of a direct current power grid voltage into three processes, namely natural voltage regulation, first voltage regulation and second voltage regulation; the converter stations in the direct current power grid are divided into three types, namely power regulation converter stations, auxiliary voltage regulation converter stations, and voltage regulation converter stations, on the basis of whether the converter station has a voltage regulation capacity, the power regulation converter stations operating in a fixed power control mode, the voltage regulation converter stations operating in a fixed voltage control mode or an auxiliary voltage control mode, and the auxiliary voltage control converter stations operating in the auxiliary voltage control mode; all the converter stations in the direct current power grid participate in natural voltage regulation, the auxiliary voltage regulation converter stations andType: GrantFiled: March 29, 2017Date of Patent: November 17, 2020Assignees: NR ELECTRIC CO., LTD, NR ENGINEERING CO., LTDInventors: Jiudong Ding, Yu Lu, Yunlong Dong, Gang Li, Zhaoqing Hu
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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: 20200212674Abstract: Disclosed are a control method and system for a parallel converter system, including a common AC voltage controller and a separate current controller for each converter; the AC voltage controller generates an active current, a wattless current, and a system voltage phase reference value and, by means of communication, sends same to the current controller of each converter in island control mode to be a converter control signal; the active and wattless current outputted by each converter, along with the corresponding current reference value, accomplish the objective of the parallel converter system collectively controlling the amplitude and frequency of an AC bus voltage. The method and system are highly reliable and effectively ensure the synchronization of a plurality of converters.Type: ApplicationFiled: May 22, 2018Publication date: July 2, 2020Inventors: Nannan WANG, Yu LU, Yunlong DONG, Jie TIAN, Chongxue JIANG, Jiacheng WANG, Gang LI, Jiudong DING, Haiying LI
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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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Publication number: 20190341777Abstract: Provided in the present invention is a direct current power grid voltage control method, dividing control of a direct current power grid voltage into three processes, namely natural voltage regulation, first voltage regulation and second voltage regulation; the converter stations in the direct current power grid are divided into three types, namely power regulation converter stations, auxiliary voltage regulation converter stations, and voltage regulation converter stations, on the basis of whether the converter station has a voltage regulation capacity, the power regulation converter stations operating in a fixed power control mode, the voltage regulation converter stations operating in a fixed voltage control mode or an auxiliary voltage control mode, and the auxiliary voltage control converter stations operating in the auxiliary voltage control mode; all the converter stations in the direct current power grid participate in natural voltage regulation, the auxiliary voltage regulation converter stations andType: ApplicationFiled: March 29, 2017Publication date: November 7, 2019Applicants: NR ELECTRIC CO., LTD, NR ENGINEERING CO., LTDInventors: Jiudong DING, Yu LU, Yunlong DONG, Gang LI, Zhaoqing HU
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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: 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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Patent number: 10218184Abstract: The present invention provides a method for inhibiting multiple inverter stations from entering a passive control mode in an island state. The method includes dividing inverter stations into groups in advance; a principle for group division is dividing inverter stations whose alternating-current sides are connected to each other through an alternating-current line in a normal running condition into a group; priorities of the inverter stations are preset in each group to tune relevant fixed values of the inverter stations for island detection; a tuning principle is that an inverter station with a higher priority has a more sensitive relevant fixed value, and an island state is more easily detected for the corresponding inverter station; an inverter station for which an island state is detected can enter a passive control mode only when all the other inverter stations with priorities higher than the priority of the inverter station in the group send enabling signals.Type: GrantFiled: November 24, 2015Date of Patent: February 26, 2019Assignees: NR ELECTRIC CO., LTD., NR ENGINEERING CO., LTD.Inventors: Yunlong Dong, Jie Tian, Dongming Cao, Haiying Li, Jiudong Ding, Zhaoqing Hu, Gang Li, Haibin Liu, Yu Lu
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Patent number: 9876420Abstract: A submodule distributed control method, device and system are provided. Submodules of each bridge arm are grouped. Each group corresponds to one valve based controller. An upper-level control device calculates a weight of each group according to a bridge arm current, an average voltage of normal submodules in each group, and the number of the normal submodules in each group; calculates, according to the number of submodules to be input in a corresponding bridge arm, the number of submodules being input in each group and delivers the number to the valve based controller. The valve based controller operates according to a voltage balancing policy and a gating method that are provided in the prior art.Type: GrantFiled: October 28, 2015Date of Patent: January 23, 2018Assignees: NR ELECTRIC CO., LTD, NR ENGINEERING CO., LTDInventors: Jiudong Ding, Jie Tian, Yunlong Dong, Haiying Li, Dongming Cao, Haibin Liu, Yu Lu
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Publication number: 20170331297Abstract: The present invention provides a method for inhibiting multiple inverter stations from entering a passive control mode in an island state. The method includes dividing inverter stations into groups in advance; a principle for group division is dividing inverter stations whose alternating-current sides are connected to each other through an alternating-current line in a normal running condition into a group; priorities of the inverter stations are preset in each group to tune relevant fixed values of the inverter stations for island detection; a tuning principle is that an inverter station with a higher priority has a more sensitive relevant fixed value, and an island state is more easily detected for the corresponding inverter station; an inverter station for which an island state is detected can enter a passive control mode only when all the other inverter stations with priorities higher than the priority of the inverter station in the group send enabling signals.Type: ApplicationFiled: November 24, 2015Publication date: November 16, 2017Applicant: NR ELECTRIC CO., LTD.Inventors: Yunlong Dong, Jie Tian, Dongming Cao, Haiying Li, Jiudong Ding, Zhaoqing Hu, Gang Li, Haibin Liu, Yu Lu
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Publication number: 20170317574Abstract: A submodule distributed control method, device and system are provided. Submodules of each bridge arm are grouped. Each group corresponds to one valve based controller. An upper-level control device calculates a weight of each group according to a bridge arm current, an average voltage of normal submodules in each group, and the number of the normal submodules in each group; calculates, according to the number of submodules to be input in a corresponding bridge arm, the number of submodules being input in each group and delivers the number to the valve based controller. The valve based controller operates according to a voltage balancing policy and a gating method that are provided in the prior art.Type: ApplicationFiled: October 28, 2015Publication date: November 2, 2017Applicants: NR ELECTRIC CO., LTD, NR ENGINEERING CO., LTDInventors: Jiudong DING, Jie TIAN, Yunlong DONG, Haiying LI, Dongming CAO, Haibin LIU, Yu LU