Direct-current transformer
A technology of DC transformers and transformers, which is applied in the direction of converting DC power input to DC power output, instruments, and adjusting electrical variables, etc. It can solve the problems of large quality and occupied area of DC transformer, small quality and occupied area, and high cost. problem, to achieve the effect of low cost, small quality and small occupied area, and reduced occupied area
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Embodiment 1
[0045] Embodiment 1 of the present invention provides a DC transformer, such as figure 2 As shown, it is located between the low-voltage DC bus and the medium-voltage DC bus, which includes a plurality of DC transformer subunits; Embodiment 1 of the present invention uses k DC transformer subunits;
[0046] The input ends of the k DC transformer subunits are connected sequentially and connected to the low-voltage DC bus; the output terminals of the k DC transformer subunits are connected sequentially and connected to the medium voltage DC bus; specifically: the k DC transformer subunits The input ends are connected in parallel, and the output ends are connected in series.
[0047] Such as figure 1 As shown, the DC transformation subunit includes a DC / DC converter and a fault isolation voltage equalization module;
[0048] The input end of the DC / DC converter is connected to the low-voltage DC bus, the output end is connected to the input end of the fault isolation voltage e...
Embodiment 2
[0070] Embodiment 2 of the present invention provides a DC transformer, such as image 3 As shown, it is located between the low-voltage DC bus and the medium-voltage DC bus, which includes a plurality of DC transformer subunits; Embodiment 2 of the present invention includes k DC transformer subunits;
[0071] The input terminals of the k DC transformer subunits are connected sequentially, and connected to the low-voltage DC bus; the output terminals of the k DC transformer subunits are connected sequentially, and connected to the medium voltage DC bus; specifically, the input terminals of the k DC transformer subunits Both the terminal and the output terminal are connected in series.
[0072] Such as figure 1 As shown, the DC transformation subunit includes a DC / DC converter and a fault isolation voltage equalization module;
[0073] The input end of the DC / DC converter is connected to the low-voltage DC bus, the output end is connected to the input end of the fault isolat...
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