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1.发明申请公开(公告)号：US20220129054A1
公开(公告)日：2022-04-28
申请号：US17427388
申请日：2019-12-30
发明人： Dong Min CHOI
摘要： A submodule for conversion of DC power capable of a plurality thereof being connected in series and used for DC-DC conversion in accordance with the present invention comprises: a power switching element for switching DC power supply to convert a source of DC including voltage transformation; a DC capacitor for storing DC power opened or closed by the power switching element; a power supply unit for supplying power required to drive the submodule from the DC capacitor; a submodule controller for controlling whole operation of the submodule; memory for storing data required for operating the submodule controller; and a communicating unit for performing data communication with an external device; wherein the submodule controller may perform a program update during a start sequence of the submodule or during a stop sequence thereof, while DC-DC conversion is operated.
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公开(公告)号：US20220357764A1
公开(公告)日：2022-11-10
申请号：US17622648
申请日：2021-01-12
发明人： Dong Min CHOI
摘要： The present invention relates to an apparatus and a method for synchronizing a clock of VBE in a HVDC system capable of increasing reliability by synchronizing the clock of the VBE in the HVDC system to suppress harmonic generation and generate duplicate clock to supply stable clock to submodules. The apparatus for synchronizing the clock of the VBE in the HVDC system comprises an operation board for creating a reference clock and an interface board for controlling submodules on or off being synchronized to a reference clock.
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公开(公告)号：US20230275510A1
公开(公告)日：2023-08-31
申请号：US18002945
申请日：2021-11-19
发明人： Dong Min CHOI , Jung Won HONG
CPC分类号： H02M3/158 , H02M1/08 , H02J7/0068 , H02J2207/20
摘要： The present invention relates to a first-cycle charging device and method of a modular multi-level converter, in which, in order to prevent the overcharging of a capacitor in a submodule in a HVDC system, charging and discharging of the capacitor in the submodule are independently carried out, and charging of the submodule in the HVDC system is enabled to be gradually carried out so as to prevent sudden flow of an instantaneous current. The first-cycle charging device of the modular multi-level converter of the present invention comprises: a submodule provided with a capacitor so as to carry out alternating current power charging and discharging; and a submodule control unit for controlling the charging, discharging, and bypassing of the submodule.
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