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公开(公告)号：US20200076321A1
公开(公告)日：2020-03-05
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： 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.
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公开(公告)号：US20190326770A1
公开(公告)日：2019-10-24
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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3.发明申请公开(公告)号：US20200185901A1
公开(公告)日：2020-06-11
申请号：US16617124
申请日：2018-05-22
发明人： Lei PAN , Jie TIAN , Yunlong Dong , Yu LU , Ruhai HUANG , Chongxue JIANG , Jiang LU , Baoshun ZHANG , Defeng QIU , Hua XIE
摘要： A method and apparatus for suppressing the impact of a compensator on line distance protection is provided, wherein the method comprises: obtaining a first current of a line connected to a compensator or series converters in the compensator, and a first voltage of a bus connected to the compensator or the line connected to the compensator; exiting the series converters and series transformers if the first current is greater than a preset current threshold and a duration is greater than a first preset time threshold; exiting the series converters and the series transformers if the first voltage is less than or equal to a preset voltage threshold and duration is greater than a second preset time threshold set the output voltage of the series converters to zero, and if a second current of an element corresponding to the first current meets conditions which the first current needs to meet; and otherwise, canceling the setting of the output voltage of the series converters to zero and obtaining a first current if a second voltage of the line corresponding to the first voltage is greater than the preset voltage threshold and the duration is greater than a third preset time threshold.
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公开(公告)号：US20190157871A1
公开(公告)日：2019-05-23
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
CPC分类号： H02J3/36 , H02J3/00 , H02J3/1807 , H02J3/1814 , H02M7/7575
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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