Novel DC power electronic transformer topology having automatic fault removal capability
A power electronics, self-cutting technology, applied in high-efficiency power electronic conversion, conversion of DC power input to DC power output, adjustment of electrical variables, etc., can solve problems such as occupying equipment volume, fault spread, contactor or capacitor burning, Achieve the effect of reducing volume and weight, improving efficiency and reducing quantity
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[0032] Attached below figure 1 -7. A detailed description of the new DC power electronic transformer topology with fault self-removal capability. It should be emphasized that the following description is only exemplary, and is not intended to limit the scope of the present invention and its application.
[0033] figure 2 It is a schematic diagram of the basic topological structure of a DC power electronic transformer used in occasion one. The medium and high voltage DC bus P p With medium and high voltage DC bus P n Between n DC support capacitors C i1 , C i2 ,..., C in Connected in series from top to bottom, respectively as the input capacitance of n bidirectional isolated DC / DC converters, low-voltage DC bus Q p With low voltage DC bus Q n Between n DC support capacitors C o1 , C o2 ,..., C on In parallel, they are used as the output capacitors of n bidirectional isolated DC / DC converters; at the same time, n groups of switching bridge arms of a voltage equalizing converter ar...
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