Multifunctional arc extinction converter and control method thereof
A converter, multi-functional technology, applied in the direction of converting AC power input to DC power output, irreversible DC power input converting to AC power output, reactive power adjustment/elimination/compensation, etc., to reduce cascade module The effect of high power density and efficiency
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[0042] In order to facilitate the understanding of those skilled in the art, the present invention will be further described below with reference to the embodiments and the accompanying drawings, and the contents mentioned in the embodiments are not intended to limit the present invention.
[0043] like image 3 As shown, the topology of the Multi-Functional arcsuppression converter (MF-ASC) provided by this embodiment is composed of a three-phase four-arm diode-clamped (Neutral Point Clamped, NPC) square wave circuit unit It is composed of a cascaded H-bridge (Cascaded H-bridge, CHB) shaping circuit unit. image 3 middle, is the three-phase supply voltage, is the grid connection point voltage, is the neutral zero-sequence voltage; r a =r b =r c =r 0 is the three-phase line-to-ground resistance C a =C b =C c =C 0 is the three-phase line-to-ground capacitance, R f is the ground fault resistance. It is the shaping voltage output by the cascaded H-bridge shaping ...
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