Testing device for operation of current changing chain and control method
A test device and operation test technology, which is applied in the field of power electronics, can solve the problems of many device components, large operating noise, and many maintenance tasks, and achieve low system capacity requirements, reduce power waste, and achieve simple effects
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Embodiment 2
[0048] This embodiment is basically the same as Embodiment 1, but the difference with Embodiment 1 is:
[0049] The link module of this embodiment includes a parallel half-bridge structure and capacitors; the half-bridge structure includes IGBT modules with upper and lower bridge arms, and each IGBT module includes anti-parallel IGBTs and diodes. The midpoint of the chain link module and the positive pole (or negative pole) of the DC side are used as the AC outlet, and the AC sides of each chain link module are connected end to end.
[0050] Reactors are installed between the midpoint of each commutation chain and the upper and lower link modules; connect the midpoint of one commutation chain to one end of the single-phase system through a soft starting circuit, and connect the midpoint of the other commutation chain The midpoint is connected to the other end of the single-phase system through a soft-start circuit (or not connected to a soft-start circuit). Such as figure 2...
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Abstract
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