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公开(公告)号：US09634476B1
公开(公告)日：2017-04-25
申请号：US15119730
申请日：2013-12-27
发明人： Dongming Cao , Taixun Fang , Yu Wang , Hao Yang , Bing Yang , Wei Shi , Wei Lu
摘要： An apparatus for breaking a line bidirectional current and a control method therefore. The apparatus comprises a breaking current branch circuit and an on-state current branch circuit, the breaking current branch circuit comprises one nonlinear resistor being connected in parallel to one first power semiconductor device, or one nonlinear resistor being connected in parallel to at least two first power semiconductor devices mutually connected in series; and the on-state current branch circuit comprises at least one bidirectional power semiconductor switch being connected in series to at least one high-speed isolation switch. The apparatus also comprises a bridge-type branch circuit. An apparatus for breaking a line bidirectional current, thereby greatly reducing costs of the apparatus and reducing difficulty in device layout, mounting and wiring of the apparatus on the premise of ensuring a breaking speed that is quick enough and a low loss.
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2.发明授权Apparatus for limiting current of line or breaking current, and control method thereof 有权用于限制线路或断路电流的装置及其控制方法公开(公告)号：US09362734B2
公开(公告)日：2016-06-07
申请号：US14764575
申请日：2013-12-27
发明人： Yu Wang , Dongming Cao , Taixun Fang , Hao Yang , Bing Yang , Wei Shi , Wei Lu
CPC分类号： H02H3/08 , H01H9/542 , H01H9/548 , H01H33/596 , H01H71/1045 , H01H2009/0083 , H02H9/02
摘要： An apparatus for limiting a current of a line or breaking a current, and a control method thereof are disclosed. The apparatus includes a current breaking branch (29) and a bridge branch. The bridge branch includes two bridge arms formed by four identical current commutation branches. Every two of the four current commutation branches are connected in series, and the formed two bridge arms are then connected in parallel. The two bridge arms are both connected in parallel to the current breaking branch, and middle points of the two bridge arms are separately connected to two ends of a line. Each current commutation branch includes at least one high-speed isolation switch (6) and at least one bidirectional power semiconductor switch (10) that are connected in series. The apparatus can turn off currents in two directions.
摘要翻译： 公开了一种限制线路电流或断开电流的装置及其控制方法。 该装置包括断路支路（29）和桥接支路。 桥分支包括由四个相同的当前换向分支形成的两个桥臂。 四个当前整流分支中的每两个串联连接，并且形成的两个桥臂然后并联连接。 两个桥臂均与当前断裂分支并联，两个桥臂的中点分别连接到一条线的两端。 每个电流换向分支包括串联连接的至少一个高速隔离开关（6）和至少一个双向功率半导体开关（10）。 该装置可以在两个方向关断电流。
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公开(公告)号：US11223291B2
公开(公告)日：2022-01-11
申请号：US17268536
申请日：2019-08-15
发明人： Chen Xie , Zhongfeng Zhang , Jie Tian , Yeyuan Xie , Haiying Li , Yu Wang , Jian Ge
摘要： A bipolar bidirectional DC converter comprises at least two valve group series (101, 102) and at least six magnetic elements (103), and said valve group series are divided into a Type-I valve group series (102) and a Type-II valve group series (101) each valve group series (101, 102) comprises a high-voltage DC port, a low-voltage DC port and at least three AC ports, and each AC port is connected to a magnetic element (103); and the other ends of the magnetic elements (103), which are connected to all the AC ports in the same valve group series (101, 102), are connected.
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公开(公告)号：US11342744B2
公开(公告)日：2022-05-24
申请号：US17251274
申请日：2019-04-01
发明人： Yeyuan Xie , Haiying Li , Yu Wang , Zhongfeng Zhang , Dongming Cao
摘要： A multi-voltage level direct current grid system and a control protection method, the direct current grid system comprising: at least two direct current buses; at least one direct current transformer, one end of which is connected to a first direct current bus while another end is connected to a second direct current bus or a lead-out wire, which may achieve direct current voltage conversion; and at least one lead-out wire current limiter, one end of the lead-out wire current limiter being connected to the second direct current bus while another end is connected to the lead-out wire; the lead-out wire current limiter comprises a first current-limiting unit, and the first current limiting unit comprises a group of direct current switches, as well as a first bypass switch and a first current-limiting resistor unit that are connected in parallel.
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5.发明授权公开(公告)号：US10279686B2
公开(公告)日：2019-05-07
申请号：US16080276
申请日：2017-03-01
发明人： Hao Yang , Yu Wang , Yeyuan Xie , Hongde Liu , Changwei Li
摘要： A locomotive regenerative electric energy feedback system with an ice melting function, comprising two regenerative electric energy feedback devices (1). A direct-current side positive electrode of the regenerative electric energy feedback device (1) is connected to a positive electrode bus of a subway traction network, wherein the positive electrode bus is connected to an uplink contact network and a downlink contact network respectively via a first switching switch (4) and a second switching switch (5). A direct-current side negative electrode of the regenerative electric energy feedback device (1) is connected to the downlink contact network or the uplink contact network via a third switching switch (2), and the direct-current side negative electrode is connected to a negative electrode bus of the subway traction network via a fourth switching switch (3). Further disclosed is a control method corresponding to the system. In the system and method, the ice melting function on a contact network circuit between two traction stations is achieved by means of switch switching and a control method for adjusting the regenerative electric energy feedback devices, and an original regenerative electric energy feedback device is used without adding an additional device, so that the reliability is high.
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