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1.发明申请公开(公告)号：US20180183231A1
公开(公告)日：2018-06-28
申请号：US15570750
申请日：2016-07-13
发明人： YEYUAN XIE , MINGLIAN ZHU , TIANGUI JIANG , CHUANJUN BO , MIN LI
IPC分类号： H02H7/12 , H03K17/081
CPC分类号： H02H7/1203 , H02M1/32 , H02M7/5387 , H02M2007/4835 , H03K17/08116 , H03K17/08146
摘要： Disclosed are a fault current-suppressing damper topology circuit and a control method thereof and a converter. An anode of a separate diode is connected to a positive electrode of a second switch module, a cathode of the separate diode is connected to one end of an energy storage capacitor, and the other end of the energy storage capacitor is connected to a negative electrode of a first switch module; a damping resistor is connected in parallel with an arrester and then with the first switch module; a bypass switch is connected in parallel between a terminal x1 and a terminal x2 of the damper topology circuit; a power supply system acquires energy from the energy storage capacitor and supplies power to a control system; and the control system controls an operating state of the damper topology circuit by controlling the bypass switch, the first switch module and the second switch module. The fault current-suppressing damper topology circuit is applied to voltage source converters. In case of a DC fault, stress resulting from fault currents is reduced by use of a damping resistor, thereby avoiding damages to a device and achieving self-power supply, modularization and independent control. The fault current-suppressing damper topology circuit can be flexibly applied to various types of voltage source converters and has outstanding economic efficiency and technicality.
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公开(公告)号：US20210265835A1
公开(公告)日：2021-08-26
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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