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公开(公告)号：US11146071B2
公开(公告)日：2021-10-12
申请号：US16770458
申请日：2018-11-28
发明人： Jiang Lu , Yu Lu , Yunlong Dong , Yongping Wang , Jie Tian , Haiying Li , Zhaoqing Hu , Nannan Wang , Ke Wang , Jiudong Ding
摘要： 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. The direct-current voltage equalization of each valve group in operation of the direct-current voltage control end or the active power control end of the series voltage source converter valve group is achieved.
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公开(公告)号：US11355932B2
公开(公告)日：2022-06-07
申请号：US16644225
申请日：2018-05-22
发明人： Nannan Wang , Yu Lu , Yunlong Dong , Jie Tian , Chongxue Jiang , Jiacheng Wang , Gang Li , Jiudong Ding , Haiying Li
摘要： 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.
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公开(公告)号：US09876420B2
公开(公告)日：2018-01-23
申请号：US15528100
申请日：2015-10-28
发明人： Jiudong Ding , Jie Tian , Yunlong Dong , Haiying Li , Dongming Cao , Haibin Liu , Yu Lu
CPC分类号： H02M1/00 , H02M7/00 , H02M7/483 , H02M2001/0003 , H02M2001/325 , H02M2007/4835
摘要： 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.
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4.发明授权公开(公告)号：US10218184B2
公开(公告)日：2019-02-26
申请号：US15533560
申请日：2015-11-24
发明人： Yunlong Dong , Jie Tian , Dongming Cao , Haiying Li , Jiudong Ding , Zhaoqing Hu , Gang Li , Haibin Liu , Yu Lu
摘要： 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.
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5.发明申请公开(公告)号：US20170331297A1
公开(公告)日：2017-11-16
申请号：US15533560
申请日：2015-11-24
发明人： Yunlong Dong , Jie Tian , Dongming Cao , Haiying Li , Jiudong Ding , Zhaoqing Hu , Gang Li , Haibin Liu , Yu Lu
CPC分类号： H02J3/46 , H02J1/10 , H02J3/00 , H02J3/005 , H02J3/36 , H02J3/38 , H02J2003/001 , H02J2003/388
摘要： 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.
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公开(公告)号：US10763761B2
公开(公告)日：2020-09-01
申请号：US16469086
申请日：2018-01-12
发明人： Jiudong Ding , Yu Lu , Yunlong Dong , Haiying Li , Jie Tian , Defeng Qiu , Tiangui Jiang , Jianyang Lian
摘要： 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.
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公开(公告)号：US10483788B2
公开(公告)日：2019-11-19
申请号：US16466835
申请日：2018-01-12
发明人： Jiudong Ding , Yu Lu , Yunlong Dong , Haiying Li , Jie Tian , Defeng Qiu , Tiangui Jiang , Jianyang Lian
摘要： 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.
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公开(公告)号：US10396562B2
公开(公告)日：2019-08-27
申请号：US16319300
申请日：2017-08-15
发明人： 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
摘要： 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.
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