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1.发明公开
公开(公告)号：EP4254701A1
公开(公告)日：2023-10-04
申请号：EP22762461.6
申请日：2022-02-28
发明人： FANG, Taixun , XIE, Yeyuan , YANG, Bing , LV, Wei , WANG, Wenjie , XU, Yuanzhen , CHEN, Yu , SUN, Chao
IPC分类号： H02H7/26
摘要： Disclosed are a multi-port hybrid direct current circuit breaker and a control method thereof. The circuit breaker includes at least two through-flow branches, at least two reversing branches and a breaking branch; each through-flow branch includes a first rapid mechanical switch and a one-way commutation switch which are connected in series; one ends of the through-flow branches are interconnected to form a direct current bus; each reversing branch includes a diode upper bridge arm and a diode lower bridge arm which are connected in series in the same direction; the other end of each through-flow branch is correspondingly connected to an intermediate point of each reversing branch to form a port; the breaking branch includes a one-way breaking switch and a nonlinear resistor which are connected in parallel; the breaking branch and the reversing branches are connected in parallel to form a first common bus and a second common bus.
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公开(公告)号：EP3477809A1
公开(公告)日：2019-05-01
申请号：EP17838379.0
申请日：2017-04-25
发明人： SHI, Wei , YANG, Bing , LV, Wei , WANG, Wenjie , XIE, Yeyuan , FANG, Taixun , CAO, Dongming
IPC分类号： H02H7/26
摘要： A closing control method for a high-voltage DC circuit breaker. The method comprises: closing breaking units of the transfer branch (2) group by group, then closing the main branch (1), and finally open the transfer branch. During the process of closing the breaking units of the transfer branch group by group, determine whether there is a fault in the power transmission system after closing current breaking unit group. if there is no fault, proceed to close the next breaking unit group until all breaking unit groups are closed before proceeding to the next step; if there is a fault, all the breaking units that have been closed are opened and the closing operation is ended. The method can pre-charge the power transmission system during the closing process of the high-voltage DC circuit breaker, and lower the overvoltage and system oscillation caused by the closing operation.
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公开(公告)号：EP3407446A1
公开(公告)日：2018-11-28
申请号：EP17785413.0
申请日：2017-04-17
发明人： CAO, Dongming , FANG, Taixun , XIE, Yeyuan , YANG, Bing , SHI, Wei , LV, Wei , WANG, Wenjie , LIU, Bin , WANG, Tao
摘要： A bridge-type circuit comprises a H-bridge switch module and a buffering and reclosing module. The H-bridge switch module comprises four power semiconductor switch devices (Ql, Q2, Q3, Q4). Every two of the four power semiconductor switch devices are connected in series in the same direction to form a bridge arm, and the two bridge arms are further connected in parallel. Middle points of the two bridge arms respectively serve as an input terminal and an output terminal. The buffering and reclosing module is connected in parallel with the two bridge arms of the full bridge module. Also provided are a direct current breaking device formed by connecting the above bridge-type circuits in cascade and a control method thereof. The direct current breaking device is provided with the buffering and reclosing module, such that line voltage fluctuation generated during a reclosing operation is small.
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