SHIELDING STRUCTURE FOR POWER CONVERSION SYSTEM AND METHOD THEREOF
    41.
    发明申请
    SHIELDING STRUCTURE FOR POWER CONVERSION SYSTEM AND METHOD THEREOF 审中-公开
    电力转换系统的屏蔽结构及其方法

    公开(公告)号:US20140055070A1

    公开(公告)日:2014-02-27

    申请号:US14011398

    申请日:2013-08-27

    Abstract: An electromagnetic shielding structure includes a first shielding material disposed at a first location with respect to at least one radiation source and a second shielding material attached with the first shielding material by fastening means. The second shielding material is disposed at a second location with respect to the at least one electromagnetic radiation source so as to define a predetermined gap between the first shielding material and the second shielding material. The first shielding material shields at least part of first frequency electromagnetic radiations generated from the at least one electromagnetic radiation source and penetrating through the second shielding material and the predetermined gap. The second shielding material shields at least part of second frequency electromagnetic radiations generated from the at least one electromagnetic radiation source.

    Abstract translation: 电磁屏蔽结构包括相对于至少一个辐射源设置在第一位置处的第一屏蔽材料和通过紧固装置附接有第一屏蔽材料的第二屏蔽材料。 第二屏蔽材料相对于至少一个电磁辐射源设置在第二位置,以便在第一屏蔽材料和第二屏蔽材料之间限定预定的间隙。 第一屏蔽材料屏蔽从至少一个电磁辐射源产生并穿透第二屏蔽材料和预定间隙的第一频率电磁辐射的至少一部分。 第二屏蔽材料屏蔽从至少一个电磁辐射源产生的第二频率电磁辐射的至少一部分。

    System and method for direct current power transmission

    公开(公告)号:US10916947B2

    公开(公告)日:2021-02-09

    申请号:US15129526

    申请日:2015-03-27

    Abstract: A modular substation (10) for subsea applications includes a plurality of modular DC/AC converters (32) configured for converting DC electrical power transmitted along a DC transmission link (24) into AC electrical power for supplying to a plurality of subsea loads (56). The plurality of modular DC/AC converters (32) is configured to couple in series to the DC transmission link (24) and couple in parallel to an AC distribution network (52). At least a first modular DC/AC converter (32) is configured to be selectively electrically and mechanically disconnected from the DC transmission link (24) and the AC distribution network (52) to facilitate maintenance of the first modular DC/AC converters (32) while the AC distribution network (52) continues to supply AC electrical power to at least one of the plurality of subsea loads (56). The modular substation (10) also comprises protection and bypass circuits (26) intended to isolate faulty DC/AC converters (32) and to facilitate safe maintenance and repair.

    Power semiconductor device and snubber circuit thereof

    公开(公告)号:US10389230B2

    公开(公告)日:2019-08-20

    申请号:US15903710

    申请日:2018-02-23

    Abstract: The present disclosure relates to a snubber circuit which comprises a static snubber unit, connected in parallel with the switch, for balancing a static voltage sharing across a switch when the switch is in a state of turn-on or turn-off; and a dynamic snubber unit for balance a dynamic voltage sharing across the switch when the switch is in a process of turn-on or turn-off, comprising a dynamic voltage sharing capacitor connected in parallel with the switch and having a relationship between a capacitance and a voltage of the dynamic voltage sharing capacitor; and a controller for controlling the capacitance of the dynamic voltage sharing capacitor to be in a predetermined working area of capacitance rising while the voltage across the switch is increasing. The present disclosure also relates to a power semiconductor device.

    System and method for full range control of dual active bridge

    公开(公告)号:US10073512B2

    公开(公告)日:2018-09-11

    申请号:US14547178

    申请日:2014-11-19

    CPC classification number: G06F1/3287 G06F1/3293 H02M3/33584

    Abstract: A power converter includes primary and secondary bridges, a transformer, and a controller configured to generate a switching mode map that correlates each of a plurality of switching modes to a respective set of value ranges of system parameters of the power converter. The sets of system parameter value ranges are contiguous and non-overlapping across the switching mode map, each of the plurality of switching modes includes gate trigger voltage timings for commuting at least one of the primary and secondary bridges. The controller is configured to obtain a plurality of measured system parameter values, select from the switching mode map one of the plurality of switching modes that correlates to the set of system parameter values containing the plurality of measured system parameter values, and adjust gate trigger voltage timings of at least one of the primary and secondary bridges, according to the selected switching mode.

    Wind converter control for weak grid

    公开(公告)号:US09970417B2

    公开(公告)日:2018-05-15

    申请号:US15098929

    申请日:2016-04-14

    CPC classification number: F03D9/257 F03D9/255 H02J3/386 H02P9/04 H02P2101/15

    Abstract: This disclosure relates to systems and methods for controlling a wind converter for a weak electrical grid. In one embodiment of the disclosure, a system for controlling the wind converter includes a wind converter connected to an electrical grid at a point of connection (POC) and operable to transfer a power to the electrical grid. The system includes a first control loop operable to calculate, based on electrical grid parameters and wind converter characteristics, a voltage reference to be generated by the wind converter. The system includes a second control loop to convert, based on the electrical grid parameters, the voltage reference into a current reference. The second loop converts the angle information of the voltage reference into a voltage at the POC. The system includes a third control to regulate, based at least on the current reference, the power transferred by the wind converter to the electrical grid.

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